Articles | Volume 6, issue 1
Original research article
23 Mar 2020
Original research article |  | 23 Mar 2020

Depletion of soil carbon and aggregation after strong warming of a subarctic Andosol under forest and grassland cover

Christopher Poeplau, Páll Sigurðsson, and Bjarni D. Sigurdsson


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Short summary
Global warming leads to increased mineralisation of soil organic matter, inducing a positive climate–carbon cycle feedback loop. Loss of organic matter can be associated with loss of soil structure. Here we use a strong geothermal gradient to investigate soil warming effects on soil organic matter and structural parameters in subarctic forest and grassland soils. Strong depletion of organic matter caused a collapse of aggregates, highlighting the potential impact of warming on soil function.