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DOI | 10.1175/JCLI-D-17-0665.1 |
Model Uncertainty in Cloud-Circulation Coupling, and Cloud-Radiative Response to Increasing CO2, Linked to Biases in Climatological Circulation | |
Lipat, Bernard R.1; Voigt, Aiko2,3; Tselioudis, George1,4; Polvani, Lorenzo M.1,3,5 | |
2018-12-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:24页码:10013-10020 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Recent analyses of global climate models suggest that uncertainty in the coupling between midlatitude clouds and the atmospheric circulation contributes to uncertainty in climate sensitivity. However, the reasons behind model differences in the cloud-circulation coupling have remained unclear. Here, we use a global climate model in an idealized aquaplanet setup to show that the Southern Hemisphere climatological circulation, which in many models is biased equatorward, contributes to the model differences in the cloud-circulation coupling. For the same poleward shift of the Hadley cell (HC) edge, models with narrower climatological HCs exhibit stronger midlatitude cloud-induced shortwave warming than models with wider climatological HCs. This cloud-induced radiative warming results predominantly from a subsidence warming that decreases cloud fraction and is stronger for narrower HCs because of a larger meridional gradient in the vertical velocity. A comparison of our aquaplanet results with comprehensive climate models suggests that about half of the model uncertainty in the midlatitude cloud-circulation coupling stems from this impact of the circulation on the large-scale temperature structure of the atmosphere, and thus could be removed by improving the climatological circulation in models. This illustrates how understanding of large-scale dynamics can help reduce uncertainty in clouds and their response to climate change. |
英文关键词 | Clouds Hadley circulation Climate sensitivity Cloud radiative effects General circulation models Model evaluation performance |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451266000001 |
WOS关键词 | EDDY-DRIVEN JET ; CMIP5 MODELS ; HADLEY-CELL ; SENSITIVITY ; SURFACE ; SPREAD |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20201 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA; 2.Karlsruhe Inst Technol, Dept Troposphere Res, Inst Meteorol & Climate Res, Karlsruhe, Germany; 3.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA; 4.NASA, GISS, New York, NY USA; 5.Columbia Univ, Dept Earth & Environm Sci, New York, NY USA |
推荐引用方式 GB/T 7714 | Lipat, Bernard R.,Voigt, Aiko,Tselioudis, George,et al. Model Uncertainty in Cloud-Circulation Coupling, and Cloud-Radiative Response to Increasing CO2, Linked to Biases in Climatological Circulation[J]. JOURNAL OF CLIMATE,2018,31(24):10013-10020. |
APA | Lipat, Bernard R.,Voigt, Aiko,Tselioudis, George,&Polvani, Lorenzo M..(2018).Model Uncertainty in Cloud-Circulation Coupling, and Cloud-Radiative Response to Increasing CO2, Linked to Biases in Climatological Circulation.JOURNAL OF CLIMATE,31(24),10013-10020. |
MLA | Lipat, Bernard R.,et al."Model Uncertainty in Cloud-Circulation Coupling, and Cloud-Radiative Response to Increasing CO2, Linked to Biases in Climatological Circulation".JOURNAL OF CLIMATE 31.24(2018):10013-10020. |
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