 |
| Titel |
Combined biogeophysical and biogeochemical effects of large-scale forest cover changes in the MPI earth system model |
| VerfasserIn |
Sebastian Bathiany, Martin Claussen, Brovkin Victor, Thomas Raddatz, Gayler Veronika |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250035901
|
|
|
|
|
|
| Zusammenfassung |
| Several previous studies have shown that biogeophysical effects can counteract the carbon
drawdown of forests and, in boreal latitudes, even overcompensate it due to large albedo
differences between forest canopy and snow. To investigate the role forest cover plays for
global climate, we conducted deforestation and afforestation experiments with the earth
system model of the Max Planck Institute for Meteorology (MPI-ESM). Complete
deforestation of the tropics (18.75Ë S - 15Ë N) exerts a global warming of 0.4 Ë
C due to an increase in CO2 concentration by initially 60 ppm and a decrease in
evapotranspiration in the deforested areas. In the northern latitudes (45Ë N - 90Ë N),
complete deforestation exerts a global cooling of 0.25 Ë C after 100 years, while
afforestation leads to an equally large warming, despite the counteracting changes in CO2
concentration. Earlier model studies are qualitatively confirmed by these findings. As
the response of temperature as well as terrestrial carbon pools is not of equal sign
at every land cell, considering forests as cooling in the tropics and warming in
high latitudes seems to be true only for the spatial mean, but not on a local scale. |
|
|
|
|
|
|