DOI: 10.1175/JCLI-D-15-0027.1
Scopus记录号: 2-s2.0-84947552066
论文题名: How well do the CMIP5 models simulate the antarctic atmospheric energy budget?
作者: Previdi M. ; Smith K.L. ; Polvani L.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 20 起始页码: 7933
结束页码: 7942
语种: 英语
英文摘要: The authors evaluate 23 coupled atmosphere-ocean general circulation models from phase 5 of CMIP (CMIP5) in terms of their ability to simulate the observed climatological mean energy budget of the Antarctic atmosphere. While the models are shown to capture the gross features of the energy budget well [e.g., the observed two-way balance between the top-of-atmosphere (TOA) net radiation and horizontal convergence of atmospheric energy transport], the simulated TOA absorbed shortwave (SW) radiation is too large during austral summer. In the multimodel mean, this excessive absorption reaches approximately 10 W m-2, with even larger biases (up to 25-30 W m-2) in individual models. Previous studies have identified similar climate model biases in the TOA net SW radiation at Southern Hemisphere midlatitudes and have attributed these biases to errors in the simulated cloud cover. Over the Antarctic, though, model cloud errors are of secondary importance, and biases in the simulated TOA net SW flux are instead driven mainly by biases in the clear-sky SW reflection. The latter are likely related in part to the models' underestimation of the observed annual minimum in Antarctic sea ice extent, thus underscoring the importance of sea ice in the Antarctic energy budget. Finally, substantial differences in the climatological surface energy fluxes between existing observational datasets preclude any meaningful assessment of model skill in simulating these fluxes. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50819
Appears in Collections: 气候变化事实与影响
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作者单位: Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States
Recommended Citation:
Previdi M.,Smith K.L.,Polvani L.M.. How well do the CMIP5 models simulate the antarctic atmospheric energy budget?[J]. Journal of Climate,2015-01-01,28(20)