Wie hängen Vegetationsänderungen und Klimawandel zusammen?
What link is there between vegetation changes and climate change?
Many regions of the world have already undergone substantial man-made climate change. Main drivers of the climate change
are emissions from burning of coal, oil, and natural gas, but also the transformation of natural vegetation to agricultural
areas. In particular clearing of forests constitutes a substantial source of greenhouse gases, but it also influences
climate directly: you can easily notice how temperature and humidity change when you walk through fallow land, cropland,
and forest. The interaction of these various effects of vegetation changes on climate is complex and less well understood
than the effects of fossil-fuel burning. This process understanding is, however, required to assess the consequences of
future agricultural expansion. Furthermore, we would like to deliberately change the vegetation cover in the future in a way
that mitigates global climate change. These topics are focus of my research.
For me, a fascinating aspect of my research is the combination of many different disciplines, such as biology, economy,
meteorology, and history. This interdisciplinarity was also the reason for me to study geography instead of one of the
purely physical climate disciplines. Here, I moved from field measurements and the analysis of satellite data to the global
perspective. During my PhD work at the Max Planck Institute for Meteorology I used global climate models to simulate in
detail the effects of past agricultural expansion. At the Department of Global Ecology at the Carnegie Institution in
Stanford I now apply this knowledge to future scenarios. At the same time I change my perspective from the influence of man
on vegetation and climate to the influence of climate change on vegetation and man – e.g. via altered yields. With my
research I hope to contribute to our ability to assess the consequences of human activity and of a changing climate and
to adapt our actions accordingly.