WE WELCOME JOSEFINE WALZ, POST DOC, WORKING WITH ELLEN DORREPAAL IN ABISKO
I have a profound interest in landscape evolution and soil processes of the Earth’s cold regions. Previously, I worked on greenhouse gas production from degrading permafrost in Siberia. Most of this research took place in summer. In the current winter ecology project in Abisko, however, we will focus the role of winter processes in plant and microbial carbon transformations. We plan to measure CO2 and CH4 emissions throughout an entire year to estimate the contribution of winter emissions to the annual carbon exchange from tundra ecosystems. By applying an isotope-labelling technique we will further partition the respired carbon into autotrophic and heterotrophic sources. Additionally, ecophysiological parameters will be measured to investigate the temperature and light limitations to plant carbon uptake in winter. Overall, this project will give us a better insight into cold-season emissions and a better constrain of an often neglected climate-feedback.