Effects of Tropical Deforestation on Global Hydroclimate: A Multimodel Ensemble Analysis
-
- Natalia Hasler
- National Center for Atmospheric Research, Boulder, Colorado
-
- David Werth
- Savannah River National Laboratory, Aiken, South Carolina
-
- Roni Avissar
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina
書誌事項
- 公開日
- 2009-03-01
- DOI
-
- 10.1175/2008jcli2157.1
- 公開者
- American Meteorological Society
この論文をさがす
説明
<jats:title>Abstract</jats:title> <jats:p>Two multimodel ensembles (MME) were produced with the GISS Model II (GM II), the GISS Atmosphere Model (AM), and the NCAR Community Climate System Model (CCSM) to evaluate the effects of tropical deforestation on the global hydroclimate. Each MME used the same 48-yr period but the two were differentiated by their land-cover types. In the “control” case, current vegetation was used, and in the “deforested” case, all tropical rain forests were converted to a mixture of shrubs and grassland. Globally, the control simulations produced with the three GCMs compared well to observations, both in the time mean and in the temporal variability, although various biases exist in the different tropical rain forests.</jats:p> <jats:p>The local precipitation response to deforestation is very strong. The remote effect in the tropics (away from the deforested tropical areas) is strong as well, but the effects at midlatitudes are weaker. In the MME, the impacts tend to be attenuated relative to the individual models.</jats:p> <jats:p>The significance of the geopotential and precipitation responses was evaluated with a bootstrap method, and results varied during the year. Tropical deforestation also produced anomalous fluxes in potential energy that were a direct response to the deforestation. These different analyses confirmed the existence of a teleconnection mechanism due to deforestation.</jats:p>
収録刊行物
-
- Journal of Climate
-
Journal of Climate 22 (5), 1124-1141, 2009-03-01
American Meteorological Society
