Modelling climate response to historical land cover change

climate with other forcings, climate responses to the changing atmospheric CO2 concentration and In order to estimate the eVect of historical land solar irradiance are also analysed. When all three cover change (deforestation) on climate, we perform factors are taken into account, dynamics of northern a set of experiments with a climate system model hemisphere temperature during the last 300 years of intermediate complexity - CLIMBER-2. We within the model are generally in agreement with focus on the biophysical eVect of the land cover the observed (reconstructed) temperature trend. We change on climate and do not explicitly account for conclude that the impact of historical land cover the biogeochemical eVect. A dynamic scenario of changes on climate is comparable with the impact deforestation during the last millennium is of the other climate forcings and that land cover formulated based on the rates of land conversion forcing is important for reproducing historical to agriculture. The deforestation scenario causes a climate change. global cooling of 0.35 ∞C with a more notable cooling of the northern hemisphere (0.5 ∞C). The Key words. Modelling, climate change, climate forcing, land cover change, deforestation, solar cooling is most pronounced in the northern middle and high latitudes, especially during the spring irradiance, carbon dioxide, land-atmosphere interaction, climate-biosphere interactions. season. To compare the eVect of deforestation on

[1]  H. Treut,et al.  The albedo of temperate and boreal forest and the Northern Hemisphere climate: a sensitivity experiment using the LMD GCM , 1994 .

[2]  Douglas V. Hoyt,et al.  A discussion of plausible solar irradiance variations, 1700-1992 , 1993 .

[3]  E. Eltahir,et al.  The response to deforestation and desertification in a model of West African monsoons , 1997 .

[4]  U. Cubasch,et al.  Simulation of the influence of solar radiation variations on the global climate with an ocean-atmosphere general circulation model , 1997 .

[5]  D. Elliott-Fisk.  The boreal forest , 1988 .

[6]  A. Henderson‐sellers,et al.  A global archive of land cover and soils data for use in general circulation climate models , 1985 .

[7]  K. Shine.  Radiative Forcing of Climate Change , 2000 .

[8]  V. Brovkin,et al.  On the stability of the high-latitude climate-vegetation system in a coupled atmosphere-biosphere model , 1999 .

[9]  D. Rind.  The Potential for Modeling the Effects of Different Forcing Factors on Climate During the Past 2000 Years , 1996 .

[10]  G. Woodwell,et al.  Changes in the Carbon Content of Terrestrial Biota and Soils between 1860 and 1980: A Net Release of CO"2 to the Atmosphere , 1983 .

[11]  Petoukhov,et al.  The influence of vegetation-atmosphere-ocean interaction on climate during the mid-holocene , 1998, Science.

[12]  David Pollard,et al.  Coupling dynamic models of climate and vegetation , 1998 .

[13]  Ann Henderson-Sellers,et al.  Biosphere-atmosphere transfer scheme(BATS) version 1e as coupled to the NCAR community climate model , 1993 .

[14]  G. Thomas,et al.  The Boreal Forests and Climate , 1992 .

[15]  Gordon B. Bonan,et al.  Effects of Land Use on the Climate of the United States , 1997 .

[16]  G. Bonan,et al.  Effects of boreal forest vegetation on global climate , 1992, Nature.

[17]  Stefan Rahmstorf,et al.  Simulation of modern and glacial climates with a coupled global model of intermediate complexity , 1998, Nature.

[18]  Roger A. Pielke,et al.  Interactions between the atmosphere and terrestrial ecosystems: influence on weather and climate , 1998 .

[19]  David Pollard,et al.  Coupling dynamic models of climate and vegetation , 1998 .

[20]  Malcolm K. Hughes,et al.  Global-scale temperature patterns and climate forcing over the past six centuries , 1998, Nature.

[21]  V. Brovkin,et al.  A continuous climate-vegetation classification for use in climate-biosphere studies , 1997 .