Joint Seminar: Local and nonlocal effects of deforestation in a climate model

Deforestation impacts climate by altering the exchange of heat, moisture and momentum between the land surface and the atmosphere. Climate is influenced at the location where deforestation takes place ('local effects'), but also in neighboring or remote regions ('nonlocal effects') via feedbacks with the atmosphere and oceans. In this talk, I introduce our method to robustly separate the local  and nonlocal biogeophysical effects.
The local effects in MPI-ESM lead to a warming in most locations, which is in agreement with previous studies about local effects inferred from satellite observations. However, in MPI-ESM we find this warming to be more than
offset by a globally averaged cooling due to the nonlocal effects. Nonlocal effects of deforestation are cooling not only for a global-scale deforestation, but also for deforestation in the low latitudes and more realistic deforestation scenarios. The role of the atmosphere and oceans for the to the nonlocal effects will be discussed. Although the nonlocal effects can not be captured in observations, the nonlocal effects should not be neglected when assessing the climate effects of deforestation.




15:15 h


Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg


Johannes Winckler, MPI-M


Guidi Zhou
Karsten Peters

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