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DOI | 10.1175/JCLI-D-18-0103.1 |
The Influence of Meridional Gradients in Insolation and Longwave Optical Depth on the Climate of a Gray Radiation GCM | |
Lutsko, Nicholas J.1; Popp, Max2 | |
2018-10-01 | |
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:19页码:7803-7822 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | The relative contributions of the meridional gradients in insolation and in longwave optical depth (caused by gradients in water vapor) to the equator-to-pole temperature difference, and to Earth's climate in general, have not been quantified before. As a first step to understanding these contributions, this study investigates simulations with an idealized general circulation model in which the gradients are eliminated individually or jointly, while keeping the global means fixed. The insolation gradient has a larger influence on the model's climate than the gradient in optical depth, but both make sizeable contributions and the changes are largest when the gradients are reduced simultaneously. Removing either gradient increases global-mean surface temperature due to an increase in the tropospheric lapse rate, while the meridional surface temperature gradients are reduced. Global warming experiments with these configurations suggest similar climate sensitivities; however, the warming patterns and feedbacks are quite different. Changes in the meridional energy fluxes lead to polar amplification of the response in all but the setup in which both gradients are removed. The lapse-rate feedback acts to polar amplify the responses in the Earth-like setup, but is uniformly negative in the other setups. Simple models are used to interpret the results, including a prognostic model that can accurately predict regional surface temperatures, given the meridional distributions of insolation and longwave optical depths. |
英文关键词 | Radiative-convective equilibrium Climatology Planetary atmospheres Radiative forcing Surface temperature Climate models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441738900001 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; AQUAPLANET MOIST GCM ; SNOWBALL EARTH ; HEAT-TRANSPORT ; AQUA-PLANET ; DOUBLE-ITCZ ; PART I ; MODEL ; AMPLIFICATION ; FEEDBACKS |
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/20244 |
专题 | 气候变化 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA; 2.Sorbonne Univ, Lab Meteorol Dynam, Paris, France |
推荐引用方式 GB/T 7714 | Lutsko, Nicholas J.,Popp, Max. The Influence of Meridional Gradients in Insolation and Longwave Optical Depth on the Climate of a Gray Radiation GCM[J]. JOURNAL OF CLIMATE,2018,31(19):7803-7822. |
APA | Lutsko, Nicholas J.,&Popp, Max.(2018).The Influence of Meridional Gradients in Insolation and Longwave Optical Depth on the Climate of a Gray Radiation GCM.JOURNAL OF CLIMATE,31(19),7803-7822. |
MLA | Lutsko, Nicholas J.,et al."The Influence of Meridional Gradients in Insolation and Longwave Optical Depth on the Climate of a Gray Radiation GCM".JOURNAL OF CLIMATE 31.19(2018):7803-7822. |
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