期刊
GEOPHYSICAL RESEARCH LETTERS
卷 45, 期 1, 页码 391-400出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL075583
关键词
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资金
- National Oceanic and Atmospheric Administration, U.S. Department of Commerce [NA14OAR4320106]
- NOAA's Climate Program Office (CPO) Climate Variability and Predictability (CVP) Program through a CPO CVP [GC14-252]
Low-level clouds are shown to be the conduit between the observed sea surface temperatures (SST) and large decadal fluctuations of the top of the atmosphere radiative imbalance. The influence of low-level clouds on the climate feedback is shown for global mean time series as well as particular geographic regions. The changes of clouds are found to be important for a midcentury period of high sensitivity and a late century period of low sensitivity. These conclusions are drawn from analysis of amip-piForcing simulations using three atmospheric general circulation models (AM2.1, AM3, and AM4.0). All three models confirm the importance of the relationship between the global climate sensitivity and the eastern Pacific trends of SST and low-level clouds. However, this work argues that the variability of the climate feedback parameter is not driven by stratocumulus-dominated regions in the eastern ocean basins, but rather by the cloudy response in the rest of the tropics.
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