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Spatial Scale Dependency of the Modelled Climatic Response to Deforestation : Volume 9, Issue 10 (22/10/2012)

By Longobardi, P.

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Book Id: WPLBN0003981070
Format Type: PDF Article :
File Size: Pages 49
Reproduction Date: 2015

Title: Spatial Scale Dependency of the Modelled Climatic Response to Deforestation : Volume 9, Issue 10 (22/10/2012)  
Author: Longobardi, P.
Volume: Vol. 9, Issue 10
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description
Description: Climate and Atmospheric Sciences Institute (CASI), Canada. Deforestation is associated with increased atmospheric CO2 and alterations to the surface energy and mass balances that can lead to local and global climate changes. Previous modelling studies show that the global surface air temperature (SAT) response to deforestation depends on latitude, with most simulations showing that high latitude deforestation results in cooling, low latitude deforestation causes warming and that the mid latitude response is mixed. These earlier conclusions are based on simulated large scale land cover change, with complete removal of trees from whole latitude bands. Using a global climate model we determine effects of removing fractions of 5% to 100% of forested areas in the high, mid and low latitudes. All high latitude deforestation scenarios reduce mean global SAT, the opposite occurring for low latitude deforestation, although a decrease in SAT is registered over low latitude deforested areas. Mid latitude SAT response is mixed. For all simulations deforested areas tend to become drier and have lower surface air temperature, although soil temperatures increase over deforested mid and low latitude grid cells. For high latitude deforestation fractions of 45% and above, larger net primary productivity, in conjunction with colder and drier conditions after deforestation, cause an increase in soil carbon large enough to generate a previously not reported net drawdown of CO2 from the atmosphere. Our results support previous indications of the importance of changes in cloud cover in the modelled temperature response to deforestation at low latitudes. They also show the complex interaction between soil carbon dynamics and climate and the role this plays on the climatic response to land cover change.

Summary
Spatial scale dependency of the modelled climatic response to deforestation

Excerpt
Arora, V. and Montenegro, A.: Small Temperature benefits provided by realistic afforestation projects, Nat. Geosci., 4, 514–518, 2011.; Bala, G., Caldeira, K., Wickett, M., Phillips, T. J., Lobell, D. B., Delire, C., and Mirin, A.: Combined climate and carbon-cycle effects of large-scale deforestation, P. Natl. Acad. Sci. USA, 104, 6550–6555, 2007.; Bathiany, S., Claussen, M., Brovkin, V., Raddatz, T., and Gayler, V.: Combined biogeophysical and biogeochemical effects of large-scale forest cover changes in the MPI earth system model, Biogeosciences, 7, 1383–1399, doi:10.5194/bg-7-1383-2010, 2010.; Betts, R.: Offset of the potential carbon sink from boreal forestation by decreases in surface albedo, Nature, 408, 187–190, 2000.; Bonan, G.: Observational evidence for reduction of daily maximum temperature by croplands in the Midwest United States, J. Climate, 14, 2430–2442, 2001.; Bonan, G., Pollard, D., and Thompson, S.: Effects of boreal forest vegetation on global climate, Nature, 359, 716–718, 1992.; Bounoua, L., DeFries, R., Collatz, G., Sellers, P., and Khan, H.: Effects of land cover conversion on surface climate, Clim. Change, 52, 29–64, 2002.; Brovkin, V., Ganopolski, A., Claussen, M., Kubatzki, C., and Petoukhov, V.: Modelling climate response to historical land cover change, Global Ecol. Biogeogr., 8, 509–517, 1999.; Brovkin, V., Claussen, M., Driesschaert, E., Fichefet, T., Kicklighter, D., Loutre, M., Matthews, H., Ramankutty, N., Schaeffer, M., and Sokolov, A.: Biogeophysical effects of historical land cover changes simulated by six Earth system models of intermediate complexity, Clim. Dynam., 26, 587–600, 2006.; Brovkin, V., Raddatz, T., Reick, C. H., Claussen, M., and Gayler, V.: Global biogeophysical interactions between forest and climate, Geophys. Res. Lett., 36, L07405, doi:10.1029/2009GL037543, 2009.; Butler, R.: The Amazon: The World's Largest Rainforest, available at: http://rainforests.mongabay.com/amazon, 2006.; Chagnon, F., Bras, R., and Wang, J.: Climatic shift in patterns of shallow clouds over the Amazon, Geophys. Res. Lett., 31, L24212, doi:10.1029/2004GL021188, 2004.; Claussen, M., Brovkin, V., and Ganopolski, A.: Biogeophysical versus biogeochemical feedbacks of large-scale land cover change, Geophys. Res. Lett., 28, 1011–1014, 2001.; Cox, P.: Description of the TRIFFID Dynamic Global Vegetation Model, Hadley Centre Technical Note, 24, 1–17, 2001.; Cox, P., Huntingford, C., and Harding, R.: A canopy conductance and photosynthesis model for use in a GCM land surface scheme, J. Hydrol., 213, 79–94, 1998.; Cox, P. M., Betts, R. A., Jones, C. D., Spall, S. A., and J., T. I.: Modelling Vegetation and the Carbon Cycle as Interactive Elements of the Climate System, Hadley Centre Technical Note, 23, 1–29, 2001.; DeFries, R. and Townsend, J.: NDVI-derived land-cover classifications at a global-scale, Int. J. Remote Sens., 15, 3567–3586, 1994.; Davin, E. L. and de Noblet-Ducoudre, N.: Climatic impact of global-scale deforestation: radiative versus nonradiative processes, J. Climate, 23, 97–11

 

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