HR: 1340h
AN: B23D-1607    [Abstracts]
TI: Dynamic vegetation enhances global warming and accelerates soil carbon decomposition
AU: * O'ishi, R
EM: ryo@ccsr.u-tokyo.ac.jp
AF: Center for Climate System Research (CCSR), The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, 277-8568, Japan
AU: Abe-Ouchi, A
AF: Center for Climate System Research (CCSR), The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, 277-8568, Japan
AU: Abe-Ouchi, A
AF: Frontier Research Center for Global Change (FRCGC), 3173-25, Showamachi, Kanazawaku, Yokohama, 236-000, Japan
AU: Sitch, S
AF: Joint Centre for Hydro-Meteorological Research (JCHMR), Maclean Building, Crowmarsh Gifford, Wallingford, OX10 8BB, United Kingdom
AU: Prentice, C
AF: Quantifying and Understanding the Earth System (QUEST), Department of Earth Science, University of Bristol, Wills Memorial Building, Queen's Road, Bristol, BS8 1RJ, United Kingdom
AB: We used an atmospheric general circulation model (AGCM) coupled interactively to a dynamic global vegetation model (DGVM) in order to quantify the climate feedback caused by changes in the distribution of vegetation under quadrupled atmospheric CO₂ concentration relative to preindustrial value. With the introduction of dynamic vegetation, global warming is amplified by approximately 10%, and total terrestrial carbon storage is reduced by 12%, primarily due to the amplification of warming caused by albedo feedback related to forest change at high latitudes (e.g., tundra to taiga) and accelerated soil carbon decomposition at northern middle and high latitudes. We also performed an additional experiment without the fertilization effect due to elevated atmospheric CO₂. The result of this additional experiment indicates the vegetation change in arid and semi-arid regions in low latitudes also contributes the amplification of warming and acceleration of soil carbon decomposition.
DE: 1615 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912)
DE: 1622 Earth system modeling (1225)
DE: 1631 Land/atmosphere interactions (1218, 1843, 3322)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting