globalchange  > 影响、适应和脆弱性
DOI: 10.1175/JCLI-D-17-0694.1
Scopus记录号: 2-s2.0-85052794659
论文题名:
The effects of the spatial distribution of direct anthropogenic aerosols radiative forcing on atmospheric circulation
作者: Chemke R.; Dagan G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期:17
起始页码: 7129
结束页码: 7145
语种: 英语
英文关键词: Aerosol radiative effect ; Atmospheric circulation ; General circulation models ; Large-scale motions
Scopus关键词: Atmospheric aerosols ; Atmospheric radiation ; Climatology ; Tropics ; Uncertainty analysis ; Aerosol concentration ; Anthropogenic aerosols ; Atmospheric circulation ; General circulation model ; Global circulation model ; Large scale motion ; Meridional temperature gradient ; Radiative effects ; Spatial distribution
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. © 2018 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110690
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel

Recommended Citation:
Chemke R.,Dagan G.. The effects of the spatial distribution of direct anthropogenic aerosols radiative forcing on atmospheric circulation[J]. Journal of Climate,2018-01-01,31(17)
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