气候变化领域集成服务门户(CCPortal): Distinct surface response to black carbon aerosols

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DOI	10.5194/acp-21-13797-2021
	Distinct surface response to black carbon aerosols
	Tang T.; Shindell D.; Zhang Y.; Voulgarakis A.; Lamarque J.-F.; Myhre G.; Faluvegi G.; Samset B.H.; Andrews T.; Olivié D.; Takemura T.; Lee X.
发表日期	2021
ISSN	1680-7316
起始页码	13797
结束页码	13809
卷号	21 期号:18
英文摘要	For the radiative impact of individual climate forcings, most previous studies focused on the global mean values at the top of the atmosphere (TOA), and less attention has been paid to surface processes, especially for black carbon (BC) aerosols. In this study, the surface radiative responses to five different forcing agents were analyzed by using idealized model simulations. Our analyses reveal that for greenhouse gases, solar irradiance, and scattering aerosols, the surface temperature changes are mainly dictated by the changes of surface radiative heating, but for BC, surface energy redistribution between different components plays a more crucial role. Globally, when a unit BC forcing is imposed at TOA, the net shortwave radiation at the surface decreases by-5.87±0.67Wm-2(Wm-2)-1 (averaged over global land without Antarctica), which is partially offset by increased downward longwave radiation (2.32±0.38Wm-2(Wm-2)-1 from the warmer atmosphere, causing a net decrease in the incoming downward surface radiation of-3.56±0.60Wm-2(Wm-2)-1. Despite a reduction in the downward radiation energy, the surface air temperature still increases by 0.25±0.08K because of less efficient energy dissipation, manifested by reduced surface sensible (-2.88±0.43Wm-2(Wm-2)-1) and latent heat flux (-1.54±0.27Wm-2(Wm-2)-1), as well as a decrease in Bowen ratio (-0.20±0.07(Wm-2)-1). Such reductions of turbulent fluxes can be largely explained by enhanced air stability (0.07±0.02K(Wm-2)-1), measured as the difference of the potential temperature between 925hPa and surface, and reduced surface wind speed (-0.05±0.01ms-1(Wm-2)-1). The enhanced stability is due to the faster atmospheric warming relative to the surface, whereas the reduced wind speed can be partially explained by enhanced stability and reduced Equator-to-pole atmospheric temperature gradient. These rapid adjustments under BC forcing occur in the lower atmosphere and propagate downward to influence the surface energy redistribution and thus surface temperature response, which is not observed under greenhouse gases or scattering aerosols. Our study provides new insights into the impact of absorbing aerosols on surface energy balance and surface temperature response. © 2021 Tao Tang et al.
语种	英语
scopus关键词	aerosol composition; aerosol formation; air temperature; black carbon; latent heat flux; shortwave radiation; surface temperature
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246576
作者单位	School of the Environment, Yale University, New Haven, CT, United States; Division of Earth and Climate Sciences, Duke University, Durham, NC, United States; Leverhulmn Centre for Wildfires Environment and Society, Department of Physics, Imperial College London, London, United Kingdom; School of Environmental Engineering, Technical University of Crete, Chania, Greece; National Center for Atmospheric Research, Boulder, CO, United States; CICERO, Center for International Climate and Environment Research, Oslo, Norway; Center for Climate System Research, Columbia University, New York, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Met Office Hadley Centre, Exeter, United Kingdom; Norwegian Meteorological Institute, Oslo, Norway; Research Institute for Applied Mechanics (RIAM), Kyushu University, Fukuoka, Japan
推荐引用方式 GB/T 7714	Tang T.,Shindell D.,Zhang Y.,et al. Distinct surface response to black carbon aerosols[J],2021,21(18).
APA	Tang T..,Shindell D..,Zhang Y..,Voulgarakis A..,Lamarque J.-F..,...&Lee X..(2021).Distinct surface response to black carbon aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(18).
MLA	Tang T.,et al."Distinct surface response to black carbon aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.18(2021).