Articles | Volume 5, issue 1
https://doi.org/10.5194/soil-5-49-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-5-49-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Original research article
| 
31 Jan 2019
Original research article |
| 31 Jan 2019
| 31 Jan 2019
Application of a laser-based spectrometer for continuous in situ measurements of stable isotopes of soil CO2 in calcareous and acidic soils
Jobin Joseph
CORRESPONDING AUTHOR
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
Christoph Külls
Laboratory for Hydrology and International Water Management, University of Applied Sciences, Lübeck, Germany
Matthias Arend
Physiological Plant Ecology (PPE), Faculty of Integrative Biology, University of Basel, Basel, Switzerland
Marcus Schaub
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
Frank Hagedorn
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
Arthur Gessler
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
Markus Weiler
Faculty of Environment and Natural resources, University of Freiburg, Freiburg, Germany
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Jonas Pyschik, Stefan Seeger, Barbara Herbstritt, and Markus Weiler
EGUsphere, https://doi.org/10.5194/egusphere-2024-528, https://doi.org/10.5194/egusphere-2024-528, 2024
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We developed a device which automates the analysis process of stable water isotopes. Stable water isotopes are a natural tracer which many researchers use to investigate water (re-)distribution processes in environmental systems. The device helps to analyse such environmental samples by automating a formerly tidious manual labor process, alowwing for a higher sample throughput. This enables larger sampling campaigns, since more samples can be processed before reaching their limited storage time.
Alexander S. Brunmayr, Frank Hagedorn, Margaux Moreno Duborgel, Luisa I. Minich, and Heather D. Graven
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2023-242, https://doi.org/10.5194/gmd-2023-242, 2024
Preprint under review for GMD
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A new generation of soil models promises to more accurately predict the carbon cycle in soils under climate change. However, measurements of 14C (the radioactive carbon isotope) in soils reveal that the new soil models face similar problems as the traditional models: they underestimate the residence time of carbon in soils and may therefore overestimate the net uptake of CO2 by the land ecosystem. Proposed solutions include restructuring the models and calibrating model parameters with 14C data.
Tatjana C. Speckert, Jeannine Suremann, Konstantin Gavazov, Maria J. Santos, Frank Hagedorn, and Guido L. B. Wiesenberg
SOIL, 9, 609–621, https://doi.org/10.5194/soil-9-609-2023, https://doi.org/10.5194/soil-9-609-2023, 2023
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Soil organic carbon (SOC) is key player in the global carbon cycle. Afforestation on pastures potentially alters organic matter input and SOC sequestration. We investigated the effects of a Picea abies L. afforestation sequence (0 to 130 years) on a former subalpine pasture on SOC stocks and dynamics. We found no difference in the SOC stock after 130 years of afforestation and thus no additional SOC sequestration. SOC composition was altered due to a modified SOC input following afforestation.
Barbara Herbstritt, Benjamin Gralher, Stefan Seeger, Michael Rinderer, and Markus Weiler
Hydrol. Earth Syst. Sci., 27, 3701–3718, https://doi.org/10.5194/hess-27-3701-2023, https://doi.org/10.5194/hess-27-3701-2023, 2023
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We present a method to collect water vapor samples into bags in the field without an in-field analyser, followed by isotope analysis in the lab. This new method resolves even fine-scaled natural isotope variations. It combines low-cost and lightweight components for maximum spatial and temporal flexibility regarding environmental setups. Hence, it allows for sampling even in terrains that are rather difficult to access, enabling future extended isotope datasets in soil sciences and ecohydrology.
Stefan Seeger and Markus Weiler
Hydrol. Earth Syst. Sci., 27, 3393–3404, https://doi.org/10.5194/hess-27-3393-2023, https://doi.org/10.5194/hess-27-3393-2023, 2023
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This study proposes a low-budget method to quantify the radial distribution of water transport velocities within trees at a high spatial resolution. We observed a wide spread of water transport velocities within a tree stem section, which were on average 3 times faster than the flux velocity. The distribution of transport velocities has implications for studies that use water isotopic signatures to study root water uptake and usually assume uniform or even implicitly infinite velocities.
Robin Schwemmle, Hannes Leistert, Steinbrich Andreas, and Markus Weiler
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2023-118, https://doi.org/10.5194/gmd-2023-118, 2023
Revised manuscript accepted for GMD
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The new process-based hydrological toolbox model RoGeR (https://roger.readthedocs.io/) can be used to estimate the components of the hydrological cycle and the related travel times of pollutants through parts of the hydrological cycle. These estimations may contribute to an effective water resources management. This paper presents the toolbox concept and provides a simple example on providing estimations to water resources management.
Mauro Hermann, Matthias Röthlisberger, Arthur Gessler, Andreas Rigling, Cornelius Senf, Thomas Wohlgemuth, and Heini Wernli
Biogeosciences, 20, 1155–1180, https://doi.org/10.5194/bg-20-1155-2023, https://doi.org/10.5194/bg-20-1155-2023, 2023
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This study examines the multi-annual meteorological history of low-forest-greenness events in Europe's temperate and Mediterranean biome in 2002–2022. We systematically identify anomalies in temperature, precipitation, and weather systems as event precursors, with noteworthy differences between the two biomes. We also quantify the impact of the most extensive event in 2022 (37 % coverage), underlining the importance of understanding the forest–meteorology interaction in a changing climate.
Andreas Hänsler and Markus Weiler
Hydrol. Earth Syst. Sci., 26, 5069–5084, https://doi.org/10.5194/hess-26-5069-2022, https://doi.org/10.5194/hess-26-5069-2022, 2022
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Spatially explicit quantification of design storms is essential for flood risk assessment and planning. However, available datasets are mainly based on spatially interpolated station-based design storms. Since the spatial interpolation of the data inherits a large potential for uncertainty, we develop an approach to be able to derive spatially explicit design storms on the basis of weather radar data. We find that our approach leads to an improved spatial representation of design storms.
Anne Hartmann, Markus Weiler, Konrad Greinwald, and Theresa Blume
Hydrol. Earth Syst. Sci., 26, 4953–4974, https://doi.org/10.5194/hess-26-4953-2022, https://doi.org/10.5194/hess-26-4953-2022, 2022
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Analyzing the impact of soil age and rainfall intensity on vertical subsurface flow paths in calcareous soils, with a special focus on preferential flow occurrence, shows how water flow paths are linked to the organization of evolving landscapes. The observed increase in preferential flow occurrence with increasing moraine age provides important but rare data for a proper representation of hydrological processes within the feedback cycle of the hydro-pedo-geomorphological system.
Nils Hinrich Kaplan, Theresa Blume, and Markus Weiler
Hydrol. Earth Syst. Sci., 26, 2671–2696, https://doi.org/10.5194/hess-26-2671-2022, https://doi.org/10.5194/hess-26-2671-2022, 2022
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This study is analyses how characteristics of precipitation events and soil moisture and temperature dynamics during these events can be used to model the associated streamflow responses in intermittent streams. The models are used to identify differences between the dominant controls of streamflow intermittency in three distinct geologies of the Attert catchment, Luxembourg. Overall, soil moisture was found to be the most important control of intermittent streamflow in all geologies.
Jasmin Fetzer, Emmanuel Frossard, Klaus Kaiser, and Frank Hagedorn
Biogeosciences, 19, 1527–1546, https://doi.org/10.5194/bg-19-1527-2022, https://doi.org/10.5194/bg-19-1527-2022, 2022
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As leaching is a major pathway of nitrogen and phosphorus loss in forest soils, we investigated several potential drivers in two contrasting beech forests. The composition of leachates, obtained by zero-tension lysimeters, varied by season, and climatic extremes influenced the magnitude of leaching. Effects of nitrogen and phosphorus fertilization varied with soil nutrient status and sorption properties, and leaching from the low-nutrient soil was more sensitive to environmental factors.
Benjamin Gralher, Barbara Herbstritt, and Markus Weiler
Hydrol. Earth Syst. Sci., 25, 5219–5235, https://doi.org/10.5194/hess-25-5219-2021, https://doi.org/10.5194/hess-25-5219-2021, 2021
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We scrutinized the quickest currently available method for stable isotope analysis of matrix-bound water. Simulating common procedures, we demonstrated the limits of certain materials currently used and identified a reliable and cost-efficient alternative. Further, we calculated the optimum proportions of important protocol aspects critical for precise and accurate analyses. Our unifying protocol suggestions increase data quality and comparability as well as the method's general applicability.
Jan Greiwe, Markus Weiler, and Jens Lange
Biogeosciences, 18, 4705–4715, https://doi.org/10.5194/bg-18-4705-2021, https://doi.org/10.5194/bg-18-4705-2021, 2021
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We analyzed variability in diel nitrate patterns at three locations in a lowland stream. Comparison of time lags between monitoring sites with water travel time indicated that diel patterns were created by in-stream processes rather than transported downstream from an upstream point of origin. Most of the patterns (70 %) could be explained by assimilatory nitrate uptake. The remaining patterns suggest seasonally varying dominance and synchronicity of different biochemical processes.
Stefan Seeger and Markus Weiler
Biogeosciences, 18, 4603–4627, https://doi.org/10.5194/bg-18-4603-2021, https://doi.org/10.5194/bg-18-4603-2021, 2021
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We developed a setup for fully automated in situ measurements of stable water isotopes in soil and the stems of fully grown trees. We used this setup in a 12-week field campaign to monitor the propagation of a labelling pulse from the soil up to a stem height of 8 m.
We could observe trees shifting their main water uptake depths multiple times, depending on water availability.
The gained knowledge about the temporal dynamics can help to improve water uptake models and future study designs.
Andreas Hänsler and Markus Weiler
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2021-366, https://doi.org/10.5194/hess-2021-366, 2021
Manuscript not accepted for further review
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Spatially explicit quantification on design storms are essential for flood risk assessment. However this information can be only achieved from substantially long records of rainfall measurements, usually only available for a few stations. Hence, design storms estimates from these few stations are then spatially interpolated leading to a major source of uncertainty. Therefore we defined a methodology to extend spatially explicit weather radar data to be used for the estimation of design storms.
Anne Hartmann, Markus Weiler, Konrad Greinwald, and Theresa Blume
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2021-242, https://doi.org/10.5194/hess-2021-242, 2021
Manuscript not accepted for further review
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Our field observation-based examination of flow path evolution, soil formation and vegetation succession across ten millennia on calcareous parent material shows how water flow paths and subsurface water storage are linked to the organization of evolving landscapes. We provide important but rare data and observations for a proper handling of hydrologic processes and their role within the feedback cycle of the hydro-pedo-geomorphological system.
Axel Schaffitel, Tobias Schuetz, and Markus Weiler
Geosci. Model Dev., 14, 2127–2142, https://doi.org/10.5194/gmd-14-2127-2021, https://doi.org/10.5194/gmd-14-2127-2021, 2021
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This paper presents FluSM, an algorithm to derive the water balance from soil moisture and metrological measurements. This data-driven water balance framework uses soil moisture as an input and therefore is applicable for cases with unclear processes and lacking parameters. In a case study, we apply FluSM to derive the water balance of 15 different permeable pavements under field conditions. These findings are of special interest for urban hydrology.
Robin Schwemmle, Dominic Demand, and Markus Weiler
Hydrol. Earth Syst. Sci., 25, 2187–2198, https://doi.org/10.5194/hess-25-2187-2021, https://doi.org/10.5194/hess-25-2187-2021, 2021
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A better understanding of the reasons why model performance is unsatisfying represents a crucial part for meaningful model evaluation. We propose the novel diagnostic efficiency (DE) measure and diagnostic polar plots. The proposed evaluation approach provides a diagnostic tool for model developers and model users and facilitates interpretation of model performance.
Severin-Luca Bellè, Asmeret Asefaw Berhe, Frank Hagedorn, Cristina Santin, Marcus Schiedung, Ilja van Meerveld, and Samuel Abiven
Biogeosciences, 18, 1105–1126, https://doi.org/10.5194/bg-18-1105-2021, https://doi.org/10.5194/bg-18-1105-2021, 2021
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Controls of pyrogenic carbon (PyC) redistribution under rainfall are largely unknown. However, PyC mobility can be substantial after initial rain in post-fire landscapes. We conducted a controlled simulation experiment on plots where PyC was applied on the soil surface. We identified redistribution of PyC by runoff and splash and vertical movement in the soil depending on soil texture and PyC characteristics (material and size). PyC also induced changes in exports of native soil organic carbon.
Michael Rinderer, Jaane Krüger, Friederike Lang, Heike Puhlmann, and Markus Weiler
Biogeosciences, 18, 1009–1027, https://doi.org/10.5194/bg-18-1009-2021, https://doi.org/10.5194/bg-18-1009-2021, 2021
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We quantified the lateral and vertical subsurface flow (SSF) and P concentrations of three beech forest plots with contrasting soil properties during sprinkling experiments. Vertical SSF was 2 orders of magnitude larger than lateral SSF, and both consisted mainly of pre-event water. P concentrations in SSF were high during the first 1 to 2 h (nutrient flushing) but nearly constant thereafter. This suggests that P in the soil solution was replenished fast by mineral or organic sources.
Merle Koelbing, Tobias Schuetz, and Markus Weiler
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2021-24, https://doi.org/10.5194/hess-2021-24, 2021
Revised manuscript not accepted
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Based on a unique and comprehensive data set of urban micro-meteorological variables, which were observed with a mobile climate station, we developed a new method to transfer mesoscale reference potential evapotranspiration to the urban microscale in street canyons. Our findings can be transferred easily to existing urban hydrologic models to improve modelling results with a more precise estimate of potential evapotranspiration on street level.
Hannah Gies, Frank Hagedorn, Maarten Lupker, Daniel Montluçon, Negar Haghipour, Tessa Sophia van der Voort, and Timothy Ian Eglinton
Biogeosciences, 18, 189–205, https://doi.org/10.5194/bg-18-189-2021, https://doi.org/10.5194/bg-18-189-2021, 2021
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Understanding controls on the persistence of organic matter in soils is essential to constrain its role in the carbon cycle. Emerging concepts suggest that the soil carbon pool is predominantly comprised of stabilized microbial residues. To test this hypothesis we isolated microbial membrane lipids from two Swiss soil profiles and measured their radiocarbon age. We find that the ages of these compounds are in the range of millenia and thus provide evidence for stabilized microbial mass in soils.
Anne Hartmann, Markus Weiler, and Theresa Blume
Earth Syst. Sci. Data, 12, 3189–3204, https://doi.org/10.5194/essd-12-3189-2020, https://doi.org/10.5194/essd-12-3189-2020, 2020
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Our analysis of soil physical and hydraulic properties across two soil chronosequences of 10 millennia in the Swiss Alps provides important observation of the evolution of soil hydraulic behavior. A strong co-evolution of soil physical and hydraulic properties was revealed by the observed change of fast-draining coarse-textured soils to slow-draining soils with a high water-holding capacity in correlation with a distinct change in structural properties and organic matter content.
Daniel Beiter, Markus Weiler, and Theresa Blume
Hydrol. Earth Syst. Sci., 24, 5713–5744, https://doi.org/10.5194/hess-24-5713-2020, https://doi.org/10.5194/hess-24-5713-2020, 2020
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We investigated the interactions between streams and their adjacent hillslopes in terms of water flow. It could be revealed that soil structure has a strong influence on how hillslopes connect to the streams, while the groundwater table tells us a lot about when the two connect. This observation could be used to improve models that try to predict whether or not hillslopes are in a state where a rain event will be likely to produce a flood in the stream.
Maria Staudinger, Stefan Seeger, Barbara Herbstritt, Michael Stoelzle, Jan Seibert, Kerstin Stahl, and Markus Weiler
Earth Syst. Sci. Data, 12, 3057–3066, https://doi.org/10.5194/essd-12-3057-2020, https://doi.org/10.5194/essd-12-3057-2020, 2020
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The data set CH-IRP provides isotope composition in precipitation and streamflow from 23 Swiss catchments, being unique regarding its long-term multi-catchment coverage along an alpine–pre-alpine gradient. CH-IRP contains fortnightly time series of stable water isotopes from streamflow grab samples complemented by time series in precipitation. Sampling conditions, catchment and climate information, lab standards and errors are provided together with areal precipitation and catchment boundaries.
Nils Hinrich Kaplan, Theresa Blume, and Markus Weiler
Hydrol. Earth Syst. Sci., 24, 5453–5472, https://doi.org/10.5194/hess-24-5453-2020, https://doi.org/10.5194/hess-24-5453-2020, 2020
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In recent decades the demand for detailed information of spatial and temporal dynamics of the stream network has grown in the fields of eco-hydrology and extreme flow prediction. We use temporal streamflow intermittency data obtained at various sites using innovative sensing technology as well as spatial predictors to predict and map probabilities of streamflow intermittency. This approach has the potential to provide intermittency maps for hydrological modelling and management practices.
Michael Stoelzle, Maria Staudinger, Kerstin Stahl, and Markus Weiler
Proc. IAHS, 383, 43–50, https://doi.org/10.5194/piahs-383-43-2020, https://doi.org/10.5194/piahs-383-43-2020, 2020
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The role of recharge and catchment storage is crucial to understand streamflow drought sensitivity. Here we introduce a model experiment with recharge stress tests as complement to climate scenarios to quantify the streamflow drought sensitivities of catchments in Switzerland. We identified a pre-drought period of 12 months as maximum storage-memory for the study catchments. From stress testing, we found up to 200 days longer summer streamflow droughts and minimum flow reductions of 50 %–80 %.
Anne Hartmann, Ekaterina Semenova, Markus Weiler, and Theresa Blume
Hydrol. Earth Syst. Sci., 24, 3271–3288, https://doi.org/10.5194/hess-24-3271-2020, https://doi.org/10.5194/hess-24-3271-2020, 2020
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Our field observation-based examination of flow path evolution, soil formation, and vegetation succession across 10 millennia shows how water flow paths and subsurface water storage are linked to the organization of evolving landscapes.
The increase found in water storage and preferential flow paths with increasing soil age shows the effect of the complex interaction of vegetation and soil development on flow paths, water balance, and runoff formation during landscape evolution.
Mirko Mälicke, Sibylle K. Hassler, Theresa Blume, Markus Weiler, and Erwin Zehe
Hydrol. Earth Syst. Sci., 24, 2633–2653, https://doi.org/10.5194/hess-24-2633-2020, https://doi.org/10.5194/hess-24-2633-2020, 2020
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We could show that distributed soil moisture time series bear a considerable amount of information about dynamic changes in soil moisture. We developed a new method to describe spatial patterns and analyze their persistency. By combining uncertainty propagation with information theory, we were able to calculate the information content of spatial similarity with respect to measurement uncertainty. This does help to understand when and why the soil is drying in an organized manner.
Axel Schaffitel, Tobias Schuetz, and Markus Weiler
Earth Syst. Sci. Data, 12, 501–517, https://doi.org/10.5194/essd-12-501-2020, https://doi.org/10.5194/essd-12-501-2020, 2020
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This paper contains detailed information about the instrumentation of permeable pavements with soil moisture sensors and the performance of infiltration experiments on these surfaces. The collected data are beneficial for studying urban water and energy cycles. They contain valuable information about the hydrological behavior of permeable pavements and urban subsurface heat anomalies. Due to the lack of similar data, we are convinced that the dataset is of great scientific value.
Michael Stoelzle, Tobias Schuetz, Markus Weiler, Kerstin Stahl, and Lena M. Tallaksen
Hydrol. Earth Syst. Sci., 24, 849–867, https://doi.org/10.5194/hess-24-849-2020, https://doi.org/10.5194/hess-24-849-2020, 2020
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During dry weather, different delayed sources of runoff (e.g. from groundwater, wetlands or snowmelt) modulate the magnitude and variability of streamflow. Hydrograph separation methods often do not distinguish these delayed contributions and mostly pool them into only two components (i.e. quickflow and baseflow). We propose a method that uncovers multiple components and demonstrates how they better reflect streamflow generation processes of different flow regimes.
Fabian Ries, Lara Kirn, and Markus Weiler
Earth Syst. Sci. Data, 12, 245–255, https://doi.org/10.5194/essd-12-245-2020, https://doi.org/10.5194/essd-12-245-2020, 2020
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Pluvial or flash floods generated by heavy precipitation events cause large economic damage and loss of life worldwide. As discharge observations from such extreme occurrences are rare, data from artificial sprinkling experiments offer valuable information on runoff generation processes, overland and subsurface flow rates, and response times. A extensive data set from 132 large-scale sprinkling experiments in Germany is described and presented in this paper.
Dominic Demand, Theresa Blume, and Markus Weiler
Hydrol. Earth Syst. Sci., 23, 4869–4889, https://doi.org/10.5194/hess-23-4869-2019, https://doi.org/10.5194/hess-23-4869-2019, 2019
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This study presents an analysis of 135 soil moisture profiles for identification of the spatial and temporal preferential flow occurrence in a complex landscape. Especially dry conditions and high rainfall intensities were found to increase preferential flow occurrence in soils. This results in a seasonal pattern of preferential flow with a higher occurrence in summer. During this time grasslands showed increased flow velocities, whereas forest sites exhibited a higher amount of bypass flow.
Nils Hinrich Kaplan, Ernestine Sohrt, Theresa Blume, and Markus Weiler
Earth Syst. Sci. Data, 11, 1363–1374, https://doi.org/10.5194/essd-11-1363-2019, https://doi.org/10.5194/essd-11-1363-2019, 2019
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Different sensing techniques including time-lapse imagery, electric conductivity and stage measurements were used to generate a combined dataset of the presence and absence of streamflow within a large number of nested sub-catchments in the Attert catchment, Luxembourg. The first sites of observation were established in 2013 and successively extended to a total number of 182 in 2016. The dataset can be used to improve understanding of the temporal and spatial dynamics of the stream network.
Tessa Sophia van der Voort, Utsav Mannu, Frank Hagedorn, Cameron McIntyre, Lorenz Walthert, Patrick Schleppi, Negar Haghipour, and Timothy Ian Eglinton
Biogeosciences, 16, 3233–3246, https://doi.org/10.5194/bg-16-3233-2019, https://doi.org/10.5194/bg-16-3233-2019, 2019
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The carbon stored in soils is the largest reservoir of organic carbon on land. In the context of greenhouse gas emissions and a changing climate, it is very important to understand how stable the carbon in the soil is and why. The deeper parts of the soil have often been overlooked even though they store a lot of carbon. In this paper, we discovered that although deep soil carbon is expected to be old and stable, there can be a significant young component that cycles much faster.
Barbara Herbstritt, Benjamin Gralher, and Markus Weiler
Hydrol. Earth Syst. Sci., 23, 3007–3019, https://doi.org/10.5194/hess-23-3007-2019, https://doi.org/10.5194/hess-23-3007-2019, 2019
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We describe a novel technique for the precise, quasi real-time observation of water-stable isotopes in gross precipitation and throughfall from tree canopies in parallel. Various processes (e.g. rainfall intensity, evapotranspiration, exchange with ambient vapour) thereby control throughfall intensity and isotopic composition. The achieved temporal resolution now competes with common meteorological measurements, thus enabling new ways to employ water-stable isotopes in forested catchments.
Emily F. Solly, Valentino Weber, Stephan Zimmermann, Lorenz Walthert, Frank Hagedorn, and Michael W. I. Schmidt
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-33, https://doi.org/10.5194/bg-2019-33, 2019
Revised manuscript not accepted
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Soils are the largest reservoir of carbon on land. In the context of global change, it is important to assess which environmental variables are needed to describe changes in the content of soil organic carbon. We assessed how climatic, vegetation and edaphic variables explain the variance of soil organic carbon content in Swiss forests. Our results provide a first indication that considering the effective cation exchange capacity of soils in future biogeochemical simulations could be beneficial.
Mirko Mälicke, Sibylle K. Hassler, Markus Weiler, Theresa Blume, and Erwin Zehe
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2018-396, https://doi.org/10.5194/hess-2018-396, 2018
Manuscript not accepted for further review
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In this study we use time dependent variograms to identify periods of organized soil moisture during drying. We could identify emerging spatial patterns which imply periods of terrestrial control on soil moisture organization. The coupling of time dependent variograms with density based clustering is a new approach to detect similarity in spatial patterns. The presented method is useful to describe states of organization and improve kriging workflows by extending their prerequisites.
Jana von Freyberg, Scott T. Allen, Stefan Seeger, Markus Weiler, and James W. Kirchner
Hydrol. Earth Syst. Sci., 22, 3841–3861, https://doi.org/10.5194/hess-22-3841-2018, https://doi.org/10.5194/hess-22-3841-2018, 2018
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We explored how the fraction of streamflow younger than ca. 3 months (Fyw) varies with landscape characteristics and climatic forcing, using an extensive isotope data set from 22 Swiss catchments. Overall, Fyw tends to be larger when catchments are wet and discharge is correspondingly higher, indicating an increase in the proportional contribution of faster flow paths at higher flows. We quantify this
discharge sensitivityof Fyw and relate it to the dominant streamflow-generating mechanisms.
Natalie Orlowski, Lutz Breuer, Nicolas Angeli, Pascal Boeckx, Christophe Brumbt, Craig S. Cook, Maren Dubbert, Jens Dyckmans, Barbora Gallagher, Benjamin Gralher, Barbara Herbstritt, Pedro Hervé-Fernández, Christophe Hissler, Paul Koeniger, Arnaud Legout, Chandelle Joan Macdonald, Carlos Oyarzún, Regine Redelstein, Christof Seidler, Rolf Siegwolf, Christine Stumpp, Simon Thomsen, Markus Weiler, Christiane Werner, and Jeffrey J. McDonnell
Hydrol. Earth Syst. Sci., 22, 3619–3637, https://doi.org/10.5194/hess-22-3619-2018, https://doi.org/10.5194/hess-22-3619-2018, 2018
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To extract water from soils for isotopic analysis, cryogenic water extraction is the most widely used removal technique. This work presents results from a worldwide laboratory intercomparison test of cryogenic extraction systems. Our results showed large differences in retrieved isotopic signatures among participating laboratories linked to interactions between soil type and properties, system setup, extraction efficiency, extraction system leaks, and each lab’s internal accuracy.
Jakob Sohrt, Heike Puhlmann, and Markus Weiler
SOIL Discuss., https://doi.org/10.5194/soil-2018-13, https://doi.org/10.5194/soil-2018-13, 2018
Revised manuscript not accepted
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We sampled concentrations of phosphorus (P) in laterally flowing water in the organic layer of three beech forest sites. Sampling frequency was in the range to minutes to ours with the intent of capturing short term variability of this parameter and the underlying mechanisms, which were analyzed with a modeling approach. While site affiliation was found to be a strong influence on P concentrations in lateral flow, some universal effects – like antecedent soil moisture – could also be determined.
Daphné Freudiger, David Mennekes, Jan Seibert, and Markus Weiler
Earth Syst. Sci. Data, 10, 805–814, https://doi.org/10.5194/essd-10-805-2018, https://doi.org/10.5194/essd-10-805-2018, 2018
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To understand glacier changes in the Swiss Alps at the large scale, long-term datasets are needed. To fill the gap between the existing glacier inventories of the Swiss Alps between 1850 and 1973, we digitized glacier outlines from topographic historical maps of Switzerland for the time periods ca. 1900 and ca. 1935. We found that > 88 % of the digitized glacier area was plausible compared to four inventories. The presented dataset is therefore valuable information for long-term glacier studies.
Michael P. Schwab, Julian Klaus, Laurent Pfister, and Markus Weiler
Biogeosciences, 15, 2177–2188, https://doi.org/10.5194/bg-15-2177-2018, https://doi.org/10.5194/bg-15-2177-2018, 2018
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We studied the diel fluctuations of dissolved organic carbon (DOC) concentrations in a small stream in Luxembourg. We identified an increased proportion of DOC from terrestrial sources as responsible for the peaks in DOC in the afternoon. Warmer water temperatures in the riparian zone in the afternoon increased the amount of water flowing towards the stream. Consequently, an increased amount of DOC-rich water from the riparian zone was entering the stream.
Jan Seibert, Marc J. P. Vis, Irene Kohn, Markus Weiler, and Kerstin Stahl
Hydrol. Earth Syst. Sci., 22, 2211–2224, https://doi.org/10.5194/hess-22-2211-2018, https://doi.org/10.5194/hess-22-2211-2018, 2018
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In many glacio-hydrological models glacier areas are assumed to be constant over time, which is a crucial limitation. Here we describe a novel approach to translate mass balances as simulated by the (glacio)hydrological model into glacier area changes. We combined the Δh approach of Huss et al. (2010) with the bucket-type model HBV and introduced a lookup table approach, which also allows periods with advancing glaciers to be represented, which is not possible with the original Huss method.
Sibylle Kathrin Hassler, Markus Weiler, and Theresa Blume
Hydrol. Earth Syst. Sci., 22, 13–30, https://doi.org/10.5194/hess-22-13-2018, https://doi.org/10.5194/hess-22-13-2018, 2018
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We use sap velocity measurements from 61 trees on 132 days to gain knowledge about the controls of landscape-scale transpiration, distinguishing tree-, stand- and site-specific controls on sap velocity and sap flow patterns and examining their dynamics during the vegetation period. Our results show that these patterns are not exclusively determined by tree characteristics. Thus, including site characteristics such as geology and aspect could be beneficial for modelling or management purposes.
Willem J. van Verseveld, Holly R. Barnard, Chris B. Graham, Jeffrey J. McDonnell, J. Renée Brooks, and Markus Weiler
Hydrol. Earth Syst. Sci., 21, 5891–5910, https://doi.org/10.5194/hess-21-5891-2017, https://doi.org/10.5194/hess-21-5891-2017, 2017
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How stream water responds immediately to a rainfall or snow event, while the average time it takes water to travel through the hillslope can be years or decades and is poorly understood. We assessed this difference by combining a 24-day sprinkler experiment (a tracer was applied at the start) with a process-based hydrologic model. Immobile soil water, deep groundwater contribution and soil depth variability explained this difference at our hillslope site.
Michael P. Schwab, Julian Klaus, Laurent Pfister, and Markus Weiler
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2017-416, https://doi.org/10.5194/hess-2017-416, 2017
Revised manuscript not accepted
Lisa Angermann, Conrad Jackisch, Niklas Allroggen, Matthias Sprenger, Erwin Zehe, Jens Tronicke, Markus Weiler, and Theresa Blume
Hydrol. Earth Syst. Sci., 21, 3727–3748, https://doi.org/10.5194/hess-21-3727-2017, https://doi.org/10.5194/hess-21-3727-2017, 2017
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This study investigates the temporal dynamics and response velocities of lateral preferential flow at the hillslope. The results are compared to catchment response behavior to infer the large-scale implications of the observed processes. A large portion of mobile water flows through preferential flow paths in the structured soils, causing an immediate discharge response. The study presents a methodological approach to cover the spatial and temporal domain of these highly heterogeneous processes.
Conrad Jackisch, Lisa Angermann, Niklas Allroggen, Matthias Sprenger, Theresa Blume, Jens Tronicke, and Erwin Zehe
Hydrol. Earth Syst. Sci., 21, 3749–3775, https://doi.org/10.5194/hess-21-3749-2017, https://doi.org/10.5194/hess-21-3749-2017, 2017
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Rapid subsurface flow in structured soils facilitates fast vertical and lateral redistribution of event water. We present its in situ exploration through local measurements and irrigation experiments. Special emphasis is given to a coherent combination of hydrological and geophysical methods. The study highlights that form and function operate as conjugated pairs. Dynamic imaging through time-lapse GPR was key to observing both and to identifying hydrologically relevant structures.
Tessa Sophia van der Voort, Frank Hagedorn, Cameron McIntyre, Claudia Zell, Lorenz Walthert, Patrick Schleppi, Xiaojuan Feng, and Timothy Ian Eglinton
Biogeosciences, 13, 3427–3439, https://doi.org/10.5194/bg-13-3427-2016, https://doi.org/10.5194/bg-13-3427-2016, 2016
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This study explores heterogeneity in 14C content of soil organic matter (SOM) at different spatial scales and across climatic and geologic gradients, which is essential for a better understanding of SOM stability. Results reveal that despite dissimilar environmental conditions, 14C contents in topsoils is relatively uniform and 14C trends with depth are similar. Plot-scale variability is significant. Statistical analysis found a significant correlation of 14C contents (0–5 cm) and temperature.
Maik Renner, Sibylle K. Hassler, Theresa Blume, Markus Weiler, Anke Hildebrandt, Marcus Guderle, Stanislaus J. Schymanski, and Axel Kleidon
Hydrol. Earth Syst. Sci., 20, 2063–2083, https://doi.org/10.5194/hess-20-2063-2016, https://doi.org/10.5194/hess-20-2063-2016, 2016
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We estimated forest transpiration (European beech) along a steep valley cross section. Atmospheric demand, obtained by the thermodynamic limit of maximum power, is the dominant control of transpiration at all sites.
To our surprise we find that transpiration is rather similar across sites with different aspect (north vs. south) and different stand structure due to systematically varying sap velocities. Such a compensation effect is highly relevant for modeling and upscaling of transpiration.
Katharina F. Gimbel, Heike Puhlmann, and Markus Weiler
Hydrol. Earth Syst. Sci., 20, 1301–1317, https://doi.org/10.5194/hess-20-1301-2016, https://doi.org/10.5194/hess-20-1301-2016, 2016
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It is usually assumed that soil properties are not affected by drought events. We used dye tracer experiments to test this assumption on six forest soils, which were forced into drought conditions. The results of this study show clear evidence for changes in infiltration pathways. In addition, most soils developed soil water repellency. Overall, the results suggest that the past climatic conditions are more important than the actual soil moisture status regarding hydrophobicity and infiltration.
Tobias Schuetz, Chantal Gascuel-Odoux, Patrick Durand, and Markus Weiler
Hydrol. Earth Syst. Sci., 20, 843–857, https://doi.org/10.5194/hess-20-843-2016, https://doi.org/10.5194/hess-20-843-2016, 2016
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We quantify the spatio-temporal impact of distinct nitrate sinks and sources on stream network nitrate dynamics in an agricultural headwater. By applying a data-driven modelling approach, we are able to fully distinguish between mixing and dilution processes, and biogeochemical in-stream removal processes along the stream network. In-stream nitrate removal is estimated by applying a novel transfer coefficient based on energy availability.
A. Hartmann, J. Kobler, M. Kralik, T. Dirnböck, F. Humer, and M. Weiler
Biogeosciences, 13, 159–174, https://doi.org/10.5194/bg-13-159-2016, https://doi.org/10.5194/bg-13-159-2016, 2016
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We consider the time period before and after a wind disturbance in an Austrian karst system. Using a process-based flow and solute transport simulation model we estimate impacts on DIN and DOC. We show that DIN increases for several years, while DOC remains within its pre-disturbance variability. Simulated transit times indicate that impact passes through the hydrological system within some months but with a small fraction exceeding transit times of even a year.
M. Sprenger, T. H. M. Volkmann, T. Blume, and M. Weiler
Hydrol. Earth Syst. Sci., 19, 2617–2635, https://doi.org/10.5194/hess-19-2617-2015, https://doi.org/10.5194/hess-19-2617-2015, 2015
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We present a novel approach that includes information about the pore water stable isotopic composition in inverse model approaches to estimate soil hydraulic parameters. Different approaches are presented and their adequacy regarding the model efficiency, realism and parameter identifiability are discussed. The advantages of the new approach are shown by an application of the inverse estimated parameters to infer the water balance and the transit time for three different study sites.
M. Staudinger, M. Weiler, and J. Seibert
Hydrol. Earth Syst. Sci., 19, 1371–1384, https://doi.org/10.5194/hess-19-1371-2015, https://doi.org/10.5194/hess-19-1371-2015, 2015
K. F. Gimbel, K. Felsmann, M. Baudis, H. Puhlmann, A. Gessler, H. Bruelheide, Z. Kayler, R. H. Ellerbrock, A. Ulrich, E. Welk, and M. Weiler
Biogeosciences, 12, 961–975, https://doi.org/10.5194/bg-12-961-2015, https://doi.org/10.5194/bg-12-961-2015, 2015
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This paper introduces a novel rainfall reduction experiment to investigate drought effects on soil-forest-understory-ecosystems. An annual drought with a return period of 40 years was imposed, while other ecosystem variables (humidity, air & soil temperature) remained unaffected. The first year of drought showed considerable changes in soil moisture dynamics, which affected leaf stomatal conductance of understory species as well as evapotranspiration rates of the forest understory ecosystem.
J. Schwaab, M. Bavay, E. Davin, F. Hagedorn, F. Hüsler, M. Lehning, M. Schneebeli, E. Thürig, and P. Bebi
Biogeosciences, 12, 467–487, https://doi.org/10.5194/bg-12-467-2015, https://doi.org/10.5194/bg-12-467-2015, 2015
S. Seeger and M. Weiler
Hydrol. Earth Syst. Sci., 18, 4751–4771, https://doi.org/10.5194/hess-18-4751-2014, https://doi.org/10.5194/hess-18-4751-2014, 2014
E. Zehe, U. Ehret, L. Pfister, T. Blume, B. Schröder, M. Westhoff, C. Jackisch, S. J. Schymanski, M. Weiler, K. Schulz, N. Allroggen, J. Tronicke, L. van Schaik, P. Dietrich, U. Scherer, J. Eccard, V. Wulfmeyer, and A. Kleidon
Hydrol. Earth Syst. Sci., 18, 4635–4655, https://doi.org/10.5194/hess-18-4635-2014, https://doi.org/10.5194/hess-18-4635-2014, 2014
J. Schwerdtfeger, M. S. Johnson, E. G. Couto, R. S. S. Amorim, L. Sanches, J. H. Campelo Jr., and M. Weiler
Hydrol. Earth Syst. Sci., 18, 4407–4422, https://doi.org/10.5194/hess-18-4407-2014, https://doi.org/10.5194/hess-18-4407-2014, 2014
B. Merz, J. Aerts, K. Arnbjerg-Nielsen, M. Baldi, A. Becker, A. Bichet, G. Blöschl, L. M. Bouwer, A. Brauer, F. Cioffi, J. M. Delgado, M. Gocht, F. Guzzetti, S. Harrigan, K. Hirschboeck, C. Kilsby, W. Kron, H.-H. Kwon, U. Lall, R. Merz, K. Nissen, P. Salvatti, T. Swierczynski, U. Ulbrich, A. Viglione, P. J. Ward, M. Weiler, B. Wilhelm, and M. Nied
Nat. Hazards Earth Syst. Sci., 14, 1921–1942, https://doi.org/10.5194/nhess-14-1921-2014, https://doi.org/10.5194/nhess-14-1921-2014, 2014
D. Freudiger, I. Kohn, K. Stahl, and M. Weiler
Hydrol. Earth Syst. Sci., 18, 2695–2709, https://doi.org/10.5194/hess-18-2695-2014, https://doi.org/10.5194/hess-18-2695-2014, 2014
R. S. Smith, R. D. Moore, M. Weiler, and G. Jost
Hydrol. Earth Syst. Sci., 18, 1835–1856, https://doi.org/10.5194/hess-18-1835-2014, https://doi.org/10.5194/hess-18-1835-2014, 2014
T. H. M. Volkmann and M. Weiler
Hydrol. Earth Syst. Sci., 18, 1819–1833, https://doi.org/10.5194/hess-18-1819-2014, https://doi.org/10.5194/hess-18-1819-2014, 2014
M. Gassmann, C. Stamm, O. Olsson, J. Lange, K. Kümmerer, and M. Weiler
Hydrol. Earth Syst. Sci., 17, 5213–5228, https://doi.org/10.5194/hess-17-5213-2013, https://doi.org/10.5194/hess-17-5213-2013, 2013
A. Hartmann, M. Weiler, T. Wagener, J. Lange, M. Kralik, F. Humer, N. Mizyed, A. Rimmer, J. A. Barberá, B. Andreo, C. Butscher, and P. Huggenberger
Hydrol. Earth Syst. Sci., 17, 3305–3321, https://doi.org/10.5194/hess-17-3305-2013, https://doi.org/10.5194/hess-17-3305-2013, 2013
N. Dietermann and M. Weiler
Hydrol. Earth Syst. Sci., 17, 2657–2668, https://doi.org/10.5194/hess-17-2657-2013, https://doi.org/10.5194/hess-17-2657-2013, 2013
J. Garvelmann, S. Pohl, and M. Weiler
Hydrol. Earth Syst. Sci., 17, 1415–1429, https://doi.org/10.5194/hess-17-1415-2013, https://doi.org/10.5194/hess-17-1415-2013, 2013
M. Stoelzle, K. Stahl, and M. Weiler
Hydrol. Earth Syst. Sci., 17, 817–828, https://doi.org/10.5194/hess-17-817-2013, https://doi.org/10.5194/hess-17-817-2013, 2013
Related subject area
Soils and atmosphere
Nutrient limitations regulate soil greenhouse gas fluxes from tropical forests: evidence from an ecosystem-scale nutrient manipulation experiment in Uganda
Oxygen isotope exchange between water and carbon dioxide in soils is controlled by pH, nitrate and microbial biomass through links to carbonic anhydrase activity
Microbial community responses determine how soil–atmosphere exchange of carbonyl sulfide, carbon monoxide, and nitric oxide responds to soil moisture
Mitigating N2O emissions from soil: from patching leaks to transformative action
Joseph Tamale, Roman Hüppi, Marco Griepentrog, Laban Frank Turyagyenda, Matti Barthel, Sebastian Doetterl, Peter Fiener, and Oliver van Straaten
SOIL, 7, 433–451, https://doi.org/10.5194/soil-7-433-2021, https://doi.org/10.5194/soil-7-433-2021, 2021
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Soil greenhouse gas (GHG) fluxes were measured monthly from nitrogen (N), phosphorous (P), N and P, and control plots of the first nutrient manipulation experiment located in an African pristine tropical forest using static chambers. The results suggest (1) contrasting soil GHG responses to nutrient addition, hence highlighting the complexity of the tropical forests, and (2) that the feedback of tropical forests to the global soil GHG budget could be altered by changes in N and P availability.
Sam P. Jones, Aurore Kaisermann, Jérôme Ogée, Steven Wohl, Alexander W. Cheesman, Lucas A. Cernusak, and Lisa Wingate
SOIL, 7, 145–159, https://doi.org/10.5194/soil-7-145-2021, https://doi.org/10.5194/soil-7-145-2021, 2021
Short summary
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Understanding how the rate of oxygen isotope exchange between water and CO2 varies in soils is key for using the oxygen isotope composition of atmospheric CO2 as a tracer of biosphere CO2 fluxes at large scales. Across 44 diverse soils the rate of this exchange responded to pH, nitrate and microbial biomass, which are hypothesised to alter activity of the enzyme carbonic anhydrase in soils. Using these three soil traits, it is now possible to predict how this isotopic exchange varies spatially.
Thomas Behrendt, Elisa C. P. Catão, Rüdiger Bunk, Zhigang Yi, Elena Schweer, Steffen Kolb, Jürgen Kesselmeier, and Susan Trumbore
SOIL, 5, 121–135, https://doi.org/10.5194/soil-5-121-2019, https://doi.org/10.5194/soil-5-121-2019, 2019
Short summary
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We measured net fluxes of OCS from nine soils with different land use in a dynamic chamber system and analyzed for one soil RNA relative abundance and gene transcripts. Our data suggest that indeed carbonic anhydrase (CA) plays an important role for OCS exchange, but the role of other enzymes might have been underestimated. Our study is the first assessment of the environmental significance of different microbial groups producing and consuming OCS by various enzymes other than CA.
C. Decock, J. Lee, M. Necpalova, E. I. P. Pereira, D. M. Tendall, and J. Six
SOIL, 1, 687–694, https://doi.org/10.5194/soil-1-687-2015, https://doi.org/10.5194/soil-1-687-2015, 2015
Short summary
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Further progress in understanding and mitigating N2O emissions from soil lies within transdisciplinary research that reaches across spatial scales and takes an ambitious look into the future.
Cited articles
Allan, D. W., Ashby, N., and Hodge, C. C.: The Science of Timekeeping,
Hewlett-Packard, 88, available at:
http://www.allanstime.com/Publications/DWA/Science_Timekeeping/TheScienceOfTimekeeping.pdf
(last access: 16 March 2018), 1997.
Arend, M., Gessler, A., and Schaub, M.: The influence of the soil on spring
and autumn phenology in European beech, Tree Physiol., 36, 78–85,
https://doi.org/10.1093/treephys/tpv087, 2016.
Baer, D. S., Paul, J. B., Gupta, M., and O'Keefe, A.: Sensitive absorption
measurements in the near-infrared region using off-axis
integrated-cavity-output spectroscopy, Appl. Phys. B-Lasers O., 75, 261–265,
https://doi.org/10.1007/s00340-002-0971-z, 2002.
Barthel, M., Sturm, P., Hammerle, A., Buchmann, N., Gentsch, L., Siegwolf,
R., and Knohl, A.: Soil
Bertolini, T., Inglima, I., Rubino, M., Marzaioli, F., Lubritto, C., Subke,
J.-A., Peressotti, A., and Cotrufo, M. F.: Sampling soil-derived
CO2 for analysis of isotopic composition: a comparison of different
techniques, Isot. Environ. Healt. S., 42, 57–65,
https://doi.org/10.1080/10256010500503312, 2006.
Bond-Lamberty, B. and Thomson, A.: Temperature-associated increases in the
global soil respiration record, Nature, 464, 579–582,
https://doi.org/10.1038/nature08930, 2010.
Bowen, G. J. and Beerling, D. J.: An integrated model for soil organic carbon
and CO2: Implications for paleosol carbonate pCO2
paleobarometry, Global Biogeochem. Cy., 18, GB1026,
https://doi.org/10.1029/2003GB002117, 2004.
Bowling, D. R., Sargent, S. D., Tanner, B. D., and Ehleringer, J. R.: Tunable
diode laser absorption spectroscopy for stable isotope studies of
ecosystem–atmosphere CO2 exchange, Agr. Forest. Meteorol., 118,
1–19, https://doi.org/10.1016/S0168-1923(03)00074-1, 2003.
Bowling, D. R., Egan, J. E., Hall, S. J., and Risk, D. A.: Environmental
forcing does not induce diel or synoptic variation in the carbon isotope
content of forest soil respiration, Biogeosciences, 12, 5143–5160,
https://doi.org/10.5194/bg-12-5143-2015, 2015.
Breecker, D. and Sharp, Z. D.: A field and laboratory method for monitoring
the concentration and isotopic composition of soil CO2, Rapid
Commun. Mass Sp., 22, 449–454, https://doi.org/10.1002/rcm.3382, 2008.
Brenninkmeijer, C. A. M., Kraft, P., and Mook, W. G.: Oxygen isotope
fractionation between CO2 and H2O, Chem. Geol., 41,
181–190, https://doi.org/10.1016/S0009-2541(83)80015-1, 1983.
Cerling, T. E.: The stable isotopic composition of modern soil carbonate and
its relationship to climate, Earth Planet. Sc. Lett., 71, 229–240,
https://doi.org/10.1016/0012-821X(84)90089-X, 1984.
Emmerich, W. E.: Carbon dioxide fluxes in a semiarid environment with high
carbonate soils, Agr. Forest. Meteorol., 116, 91–102, 2003.
Francey, R. J. and Tans, P. P.: Latitudinal variation in oxygen-18 of
atmospheric CO2, Nature, 327, 495–497, https://doi.org/10.1038/327495a0, 1987.
Gangi, L., Rothfuss, Y., Ogée, J., Wingate, L., Vereecken, H., and
Brüggemann, N.: A New Method for In Situ Measurements of Oxygen
Isotopologues of Soil Water and Carbon Dioxide with High Time Resolution,
Vadose Zone J., 14, 0, https://doi.org/10.2136/vzj2014.11.0169, 2015.
Glatting, G., Kletting, P., Reske, S. N., Hohl, K., and Ring, C.: Choosing
the optimal fit function: Comparison of the Akaike information criterion and
the F-test, Med. Phys., 34, 4285–4292, https://doi.org/10.1118/1.2794176, 2007.
Guillon, S., Pili, E., and Agrinier, P.: Using a laser-based CO2
carbon isotope analyser to investigate gas transfer in geological media,
Appl. Phys. B, 107, 449–457, https://doi.org/10.1007/s00340-012-4942-8, 2012.
Gut, A., Blatter, A., Fahrni, M., Lehmann, B. E., Neftel, A., and
Staffelbach, T.: A new membrane tube technique (METT) for continuous gas
measurements in soils, Plant Soil, 198, 79–88, https://doi.org/10.1023/A:1004277519234,
1998.
Harwood, K. G., Gillon, J. S., Roberts, A., and Griffiths, H.: Determinants
of isotopic coupling of CO2 and water vapour within a Quercus
petraea forest canopy, Oecologia, 119, 109–119, https://doi.org/10.1007/s004420050766,
1999.
Hurvich, C. M. and Tsai, C.: Regression and time series model selection in
small samples, Biometrika, 76, 297–307, https://doi.org/10.1093/biomet/76.2.297, 1989.
IUSS (International Union of Soil Sciences) Working Group WRB: World
Reference Base for Soil Resources 2014, update 2015 International soil
classification system for naming soils and creating legends for soil maps,
World Soil Resources Reports No. 106, FAO, Rome, Italy, 2015.
Jochheim, H., Wirth, S., and von Unold, G.: A multi-layer, closed-loop system
for continuous measurement of soil CO2 concentration, J. Plant
Nutr. Soil Sci., 181, 61–68, https://doi.org/10.1002/jpln.201700259, 2018.
Joseph, J.: Application of a laser-based spectrometer for continuous insitu
measurements of stable isotopes of soil CO2 in calcareous and
acidic soils (Data set), Zenodo, https://doi.org/10.5281/zenodo.2551238, 2019.
Jost, H.-J., Castrillo, A., and Wilson, H. W.: Simultaneous
13C∕12C and 18O∕16O isotope ratio measurements on
CO2 based on off-axis integrated cavity output spectroscopy, Isot.
Environ. Healt. S., 42, 37–45, https://doi.org/10.1080/10256010500503163, 2006.
Kammer, A., Tuzson, B., Emmenegger, L., Knohl, A., Mohn, J., and Hagedorn,
F.: Application of a quantum cascade laser-based spectrometer in a closed
chamber system for real-time δ13C and δ18O
measurements of soil-respired CO2, Agr. Forest. Meteorol., 151,
39–48, https://doi.org/10.1016/j.agrformet.2010.09.001, 2011.
Kato, T., Nakazawa, T., Aoki, S., Sugawara, S., and Ishizawa, M.: Seasonal
variation of the oxygen isotopic ratio of atmospheric carbon dioxide in a
temperate forest, Japan, Global Biogeochem. Cy., 18, GB2020,
https://doi.org/10.1029/2003GB002173, 2004.
Kayler, Z. E., Sulzman, E. W., Rugh, W. D., Mix, A. C., and Bond, B. J.: Soil
biology and biochemistry, Pergamon, available at:
https://www.cabdirect.org/cabdirect/abstract/20103097455 (last access:
16 March 2018), 2010.
Keeling, C. D.: The concentration and isotopic abundances of atmospheric
carbon dioxide in rural areas, Geochim. Cosmochim. Ac., 13, 322–334,
https://doi.org/10.1016/0016-7037(58)90033-4, 1958.
Kerstel, E. and Gianfrani, L.: Advances in laser-based isotope ratio
measurements: selected applications, Appl. Phys. B, 92, 439–449,
https://doi.org/10.1007/s00340-008-3128-x, 2008.
Kuster, T. M., Arend, M., Bleuler, P., Günthardt-Goerg, M. S., and
Schulin, R.: Water regime and growth of young oak stands subjected to
air-warming and drought on two different forest soils in a model ecosystem
experiment, Plant Biol., 15, 138–147, https://doi.org/10.1111/j.1438-8677.2011.00552.x,
2013.
Kuzyakov, Y.: Sources of CO2 efflux from soil and review of
partitioning methods, Soil Biol. Biochem., 38, 425–448,
https://doi.org/10.1016/j.soilbio.2005.08.020, 2006.
Levin, I., Graul, R., and Trivett, N. B. A.: Long-term observations of
atmospheric CO2 and carbon isotopes at continental sites in
Germany, Tellus B, 47, 23–34, https://doi.org/10.1034/j.1600-0889.47.issue1.4.x, 1995.
Maier, M. and Schack-Kirchner, H.: Using the gradient method to determine
soil gas flux: A review, Agr. Forest. Meteorol., 192–193, 78–95,
https://doi.org/10.1016/j.agrformet.2014.03.006, 2014.
Mortazavi, B., Prater, J. L., and Chanton, J. P.: A field-based method for
simultaneous measurements of the δ18O and δ13C
of soil CO2 efflux, Biogeosciences, 1, 1–9,
https://doi.org/10.5194/bg-1-1-2004, 2004.
Nelson, D. D., McManus, J. B., Herndon, S. C., Zahniser, M. S., Tuzson, B.,
and Emmenegger, L.: New method for isotopic ratio measurements of atmospheric
carbon dioxide using a 4.3 µm pulsed quantum cascade laser, Appl.
Phys. B, 90, 301–309, https://doi.org/10.1007/s00340-007-2894-1, 2008.
Oerter, E. J. and Amundson, R.: Climate controls on spatial and temporal
variations in the formation of pedogenic carbonate in the western Great Basin
of North America, Geol. Soc. Am. Bull., 128, 1095–1104,
https://doi.org/10.1130/B31367.1, 2016.
Ohlsson, K., Singh, B., Holm, S., Nordgren, A., Lovdahl, L., and Hogberg, P.:
Uncertainties in static closed chamber measurements of the carbon isotopic
ratio of soil-respired CO, Soil Biol. Biochem., 37, 2273–2276,
https://doi.org/10.1016/j.soilbio.2005.03.023, 2005.
O'Keefe, A. and Deacon, D. A. G.: Cavity ring-down optical spectrometer for
absorption measurements using pulsed laser sources, Rev. Sci. Instrum., 59,
2544–2551, https://doi.org/10.1063/1.1139895, 1988.
O'Keefe, A., Scherer, J. J., and Paul, J. B.: Cw Integrated Cavity Output
Spectroscopy, Publ. Chem. Phys. Lett., 307, 343–349, 1999.
Parameswaran, K. R., Rosen, D. I., Allen, M. G., Ganz, A. M., and Risby, T.
H.: Off-axis integrated cavity output spectroscopy with a mid-infrared
interband cascade laser for real-time breath ethane measurements, Appl.
Optics, 48, B73-79, https://doi.org/10.1364/AO.48.000B73, 2009.
Parent, F., Plain, C., Epron, D., Maier, M., and Longdoz, B.: A new method
for continuously measuring the δ13C of soil CO2
concentrations at different depths by laser spectrometry, Eur. J. Soil Sci.,
64, 516–525, https://doi.org/10.1111/ejss.12047, 2013.
Peltola, J., Vainio, M., Ulvila, V., Siltanen, M., Metsälä, M., and
Halonen, L.: Off-axis re-entrant cavity ring-down spectroscopy with a
mid-infrared continuous-wave optical parametric oscillator, Appl. Phys. B,
107, 839–847, https://doi.org/10.1007/s00340-012-5074-x, 2012.
Plestenjak, G., Eler, K., Vodnik, D., Ferlan, M., Čater, M., Kanduč,
T., Simončič, P., and Ogrinc, N.: Sources of soil CO2 in
calcareous grassland with woody plant encroachment, J. Soils Sediments, 12,
1327–1338, https://doi.org/10.1007/s11368-012-0564-3, 2012.
Ramnarine, R., Wagner-Riddle, C., Dunfield, K. E., and Voroney, R. P.:
Contributions of carbonates to soil CO2 emissions, Can. J. Soil
Sci., 92, 599–607, https://doi.org/10.4141/cjss2011-025, 2012.
Risk, D. and Kellman, L.: Isotopic fractionation in non-equilibrium diffusive
environments, Geophys. Res. Lett., 35, L02403, https://doi.org/10.1029/2007GL032374,
2008.
Satakhun, D., Gay, F., Chairungsee, N., Kasemsap, P., Chantuma, P.,
Thanisawanyangkura, S., Thaler, P., and Epron, D.: Soil CO2 efflux
and soil carbon balance of a tropical rubber plantation, Ecol. Res., 28,
969–979, https://doi.org/10.1007/s11284-013-1079-0, 2013.
Schär, C., Vidale, P. L., Lüthi, D., Frei, C., Häberli, C.,
Liniger, M. A., and Appenzeller, C.: The role of increasing temperature
variability in European summer heatwaves, Nature, 427, 332–336,
https://doi.org/10.1038/nature02300, 2004.
Schindlbacher, A., Borken, W., Djukic, I., Brandstätter, C., Spötl,
C., and Wanek, W.: Contribution of carbonate weathering to the CO2
efflux from temperate forest soils, Biogeochemistry, 124, 273–290,
https://doi.org/10.1007/s10533-015-0097-0, 2015.
Schmidt, M. W. I., Torn, M. S., Abiven, S., Dittmar, T., Guggenberger, G.,
Janssens, I. A., Kleber, M., Kögel-Knabner, I., Lehmann, J., Manning, D.
A. C., Nannipieri, P., Rasse, D. P., Weiner, S., and Trumbore, S. E.:
Persistence of soil organic matter as an ecosystem property, Nature, 478,
49–56, https://doi.org/10.1038/nature10386, 2011.
Schönwitz, R., Stichler, W., and Ziegler, H.: δ13C values
of CO2 from soil respiration on sites with crops of C3 and
C4 type of photosynthesis, Oecologia, 69, 305–308,
https://doi.org/10.1007/BF00377638, 1986.
Serrano-Ortiz, P., Roland, M., Sanchez-Moral, S., Janssens, I. A., Domingo,
F., Goddéris, Y., and Kowalski, A. S.: Hidden, abiotic CO2
flows and gaseous reservoirs in the terrestrial carbon cycle: Review and
perspectives, Agr. Forest. Meteorol., 150, 321–329,
https://doi.org/10.1016/j.agrformet.2010.01.002, 2010.
Sperber, C. Von, Weiler, M., and Büggemann, N.: The effect of soil
moisture, soil particle size, litter layer and carbonic anhydrase on the
oxygen isotopic composition of soil-released CO2, Eur. J. Soil
Sci., 66, 566–576, https://doi.org/10.1111/ejss.12241, 2015.
Stevenson, B. A. and Verburg, P. S. J.: Effluxed CO2-13C from
sterilized and unsterilized treatments of a calcareous soil, Soil Biol.
Biochem., 38, 1727–1733, https://doi.org/10.1016/j.soilbio.2005.11.028, 2006.
Stumpp, C., Brüggemann, N., and Wingate, L.: Stable Isotope Approaches in
Vadose Zone Research, Vadose Zone J., 17, 0, https://doi.org/10.2136/vzj2018.05.0096,
2018.
Sturm, P., Eugster, W., and Knohl, A.: Eddy covariance measurements of
CO2 isotopologues with a quantum cascade laser absorption
spectrometer, Agr. Forest. Meteorol., 152, 73–82,
https://doi.org/10.1016/j.agrformet.2011.09.007, 2012.
Tamir, G., Shenker, M., Heller, H., Bloom, P. R., Fine, P., and Bar-Tal, A.:
Can Soil Carbonate Dissolution Lead to Overestimation of Soil Respiration?,
Soil Sci. Soc. Am. J., 75, 1414, https://doi.org/10.2136/sssaj2010.0396, 2011.
Torn, M. S., Davis, S., Bird, J. A., Shaw, M. R., and Conrad, M. E.:
Automated analysis of 13C∕12C ratios in CO2 and
dissolved inorganic carbon for ecological and environmental applications,
Rapid Commun. Mass Sp., 17, 2675–2682, https://doi.org/10.1002/rcm.1246, 2003.
von Basum, G., Halmer, D., Hering, P., Mürtz, M., Schiller, S.,
Müller, F., Popp, A., and Kühnemann, F.: Parts per trillion
sensitivity for ethane in air with an optical parametric oscillator cavity
leak-out spectrometer, Opt. Lett., 29, 797–799, https://doi.org/10.1364/OL.29.000797,
2004.
Werner, C. and Gessler, A.: Diel variations in the carbon isotope composition
of respired CO2 and associated carbon sources: a review of dynamics
and mechanisms, Biogeosciences, 8, 2437–2459,
https://doi.org/10.5194/bg-8-2437-2011, 2011.
Werner, C., Schnyder, H., Cuntz, M., Keitel, C., Zeeman, M. J., Dawson, T.
E., Badeck, F.-W., Brugnoli, E., Ghashghaie, J., Grams, T. E. E., Kayler, Z.
E., Lakatos, M., Lee, X., Máguas, C., Ogée, J., Rascher, K. G.,
Siegwolf, R. T. W., Unger, S., Welker, J., Wingate, L., and Gessler, A.:
Progress and challenges in using stable isotopes to trace plant carbon and
water relations across scales, Biogeosciences, 9, 3083–3111,
https://doi.org/10.5194/bg-9-3083-2012, 2012.
Wingate, L., Ogée, J., Cuntz, M., Genty, B., Reiter, I., Seibt, U.,
Yakir, D., Maseyk, K., Pendall, E. G., Barbour, M. M., Mortazavi, B.,
Burlett, R., Peylin, P., Miller, J., Mencuccini, M., Shim, J. H., Hunt, J.,
and Grace, J.: The impact of soil microorganisms on the global budget of
δ18O in atmospheric CO2, P. Natl. Acad. Sci. USA,
106, 22411–22415, https://doi.org/10.1073/pnas.0905210106, 2009.
Wingate, L., Ogée, J., Burlett, R., Bosc, A., Devaux, M., Grace, J.,
Loustau, D., and Gessler, A.: Photosynthetic carbon isotope discrimination
and its relationship to the carbon isotope signals of stem, soil and
ecosystem respiration, New Phytol., 188, 576–589,
https://doi.org/10.1111/j.1469-8137.2010.03384.x, 2010.
Yamaoka, K., Nakagawa, T., and Uno, T.: Application of Akaike's information
criterion (AIC) in the evaluation of linear pharmacokinetic equations, J.
Pharmacokinet. Biopharm., 6, 165–175, https://doi.org/10.1007/BF01117450, 1978.
Zamanian, K., Pustovoytov, K., and Kuzyakov, Y.: Pedogenic carbonates: Forms
and formation processes, Earth-Sci. Rev., 157, 1–17,
https://doi.org/10.1016/J.EARSCIREV.2016.03.003, 2016.
Short summary
By coupling an OA-ICOS with hydrophobic but gas-permeable membranes placed at different depths in acidic and calcareous soils, we investigated the contribution of abiotic and biotic components to total soil CO2 release. In calcareous Gleysol, CO2 originating from carbonate dissolution contributed to total soil CO2 concentration at detectable degrees, probably due to CO2 evasion from groundwater. Inward diffusion of atmospheric CO2 was found to be pronounced in the topsoil layers at both sites.
By coupling an OA-ICOS with hydrophobic but gas-permeable membranes placed at different depths...
