The publication "Proglacial wetlands: an overlooked CO2 sink within recently deglaciated landscapes" is the first to report on wetlands in recently deglaciated areas. The study demonstrates that wetlands are an important component of these landscapes, but have unfortunately been overlooked in previous studies. As glaciers retreat around the globe, there has been rapid growth of research on deglaciation and its effects. This study provides timely insights that should influence future research in deglaciated landscapes emphasising the importance of including wet soils.

This study investigates interactions between soil organic carbon (SOC) and calcium (Ca). It reveals that Ca contributes to SOC stability even in acidic soils, a finding that departs from previous assumptions that Ca's role is limited to neutral or alkaline soils. It also investigates the formation mechanisms driving the association of Ca with a characteristic fraction of SOC, highlighting the importance of decomposition processes in its formation. In this work, the authors employ advanced spectromicroscopy and targeted experiments to confirm that Ca binds SOC compounds rich in aromatic and phenolic groups after decomposition, preventing their loss as dissolved organic carbon. The identification of this biogeochemical mechanism has direct implications for improving soil carbon models and guiding Ca amendment practices in agriculture, enhancing soil carbon retention and contributing to climate resilience.

This manuscript is published as SOIL Letters publication as it provides a timely and important contribution, formulating six fundamental principles for the robust study of soil carbon saturation. This is an important topic in research on soil carbon and its role in climate change mitigation which should be of interest to the wider geoscience community.