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DOI | 10.1175/JCLI-D-17-0694.1 |
The Effects of the Spatial Distribution of Direct Anthropogenic Aerosols Radiative Forcing on Atmospheric Circulation | |
Chemke, Rei1; Dagan, Guy2 | |
2018-09-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:17页码:7129-7145 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Israel |
英文摘要 | The large uncertainty in estimating the global aerosol radiative forcing (ARF) is one of the major challenges the climate community faces for climate projection. While the global-mean ARF may affect global quantities such as surface temperature, its spatial distribution may result in local thermodynamical and, thus, dynamical changes. Future changes in aerosol emissions distribution could further modulate the atmospheric circulation. Here, the effects of the spatial distribution of the direct anthropogenic ARF are studied using an idealized global circulation model, forced by a range of estimated-ARF amplitudes, based on the Copernicus Atmosphere Monitoring Service data. The spatial distribution of the estimated-ARF is globally decomposed, and the effects of the different modes on the circulation are studied. The most dominant spatial distribution feature is the cooling of the Northern Hemisphere in comparison to the Southern Hemisphere. This induces a negative meridional temperature gradient around the equator, which modulates the mean fields in the tropics. The ITCZ weakens and shifts southward, and the Northern (Southern) Hemisphere Hadley cell strengthens (weakens). The localization of the ARF in the Northern Hemisphere midlatitudes shifts the subtropical jet poleward and strengthens both the eddy-driven jet and Ferrel cell, because of the weakening of high-latitude eddy fluxes. Finally, the larger aerosol concentration in Asia compared to North America results in an equatorial superrotating jet. Understanding the effects of the different modes on the general circulation may help elucidate the circulation's future response to the projected changes in ARF distribution. |
英文关键词 | Atmospheric circulation Large-scale motions General circulation models Aerosol radiative effect |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439991400005 |
WOS关键词 | INTERTROPICAL CONVERGENCE ZONE ; CONVECTIVE ADJUSTMENT SCHEME ; CLIMATE RESPONSE ; BLACK CARBON ; EQUILIBRIUM RESPONSE ; VOLCANIC-ERUPTIONS ; MODEL ; DRIVEN ; GCM ; SUPERROTATION |
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/19325 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA; 2.Weizmann Inst Sci, Dept Earth & Planetary Sci, Rehovot, Israel |
推荐引用方式 GB/T 7714 | Chemke, Rei,Dagan, Guy. The Effects of the Spatial Distribution of Direct Anthropogenic Aerosols Radiative Forcing on Atmospheric Circulation[J]. JOURNAL OF CLIMATE,2018,31(17):7129-7145. |
APA | Chemke, Rei,&Dagan, Guy.(2018).The Effects of the Spatial Distribution of Direct Anthropogenic Aerosols Radiative Forcing on Atmospheric Circulation.JOURNAL OF CLIMATE,31(17),7129-7145. |
MLA | Chemke, Rei,et al."The Effects of the Spatial Distribution of Direct Anthropogenic Aerosols Radiative Forcing on Atmospheric Circulation".JOURNAL OF CLIMATE 31.17(2018):7129-7145. |
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