Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3602703d&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 2, CiteID L02703
Mathematics
Logic
10
Biogeosciences: Carbon Cycling (4806), Global Change: Global Climate Models (3337, 4928), Global Change: Land/Atmosphere Interactions (1218, 1843, 3322), Atmospheric Processes: Clouds And Cloud Feedbacks
Scientific paper
We performed an ensemble of twelve five-year experiments using a coupled climate-carbon-cycle model with scenarios of prescribed atmospheric carbon dioxide concentration; CO2 was instantaneously doubled or quadrupled at the start of the experiments. Within these five years, climate feedback is not significantly influenced by the effects of climate change on the carbon system. However, rapid changes take place, within much less than a year, due to the physiological effect of CO2 on plant stomatal conductance, leading to adjustment in the shortwave cloud radiative effect over land, due to a reduction in low cloud cover. This causes a 10% enhancement to the radiative forcing due to CO2, which leads to an increase in the equilibrium warming of 0.4 and 0.7 K for doubling and quadrupling. The implications for calibration of energy-balance models are discussed.
Boucher Olivier
Doutriaux-Boucher M.
Gregory Jonathan M.
Webb Mark J.
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