气候变化领域集成服务门户(CCPortal): Global vertically resolved aerosol direct radiation effect from three years of CALIOP data using the FORTH radiation transfer model

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DOI	10.1016/j.atmosres.2019.03.024
	Global vertically resolved aerosol direct radiation effect from three years of CALIOP data using the FORTH radiation transfer model
	Korras-Carraca M.B.; Pappas V.; Hatzianastassiou N.; Vardavas I.; Matsoukas C.
发表日期	2019
ISSN	0169-8095
起始页码	138
结束页码	156
卷号	224
英文摘要	We use global aerosol optical depth data from CALIOP with a radiation transfer model to investigate the aerosol direct radiative effect (DRE) and its sensitivity to the aerosol vertical resolution. Our study spans three years (2007–2009) and uses cloud data from ISCCP D2 to take into account cloud-aerosol radiative interactions on a monthly 2.5° × 2.5° resolution. The three-year global average all-sky aerosol DRE at the surface, in the atmosphere, and at the top of atmosphere (TOA) was calculated to be −4.23, 2.40, and −1.83 Wm −2 , respectively. As expected, local DREs and atmospheric heating rates are shown to vary significantly. The largest magnitudes of the DREs are observed in regions with heavy aerosol load consisting of both natural and anthropogenic particles, such as desert dust, biomass burning and urban/industrial pollution. At TOA the aerosol effect is generally of negative sign, though a planetary heating effect is found in regions characterized by both absorbing aerosol and large surface albedo, such as deserts. Clouds scatter and absorb solar radiation, which generally decreases the aerosol cooling at the surface and the aerosol warming in the atmosphere. However, the latter effect is attenuated due to the enhancement of radiation absorption by the above-cloud aerosols. As a result, clouds decrease the aerosol TOA (planetary) cooling, and sometimes even cause aerosol warming (e.g. over the tropical South Atlantic). The cloud effect on the aerosol DRE depends strongly on the aerosol optical properties and the aerosol load fraction above low clouds. Comparing the effect of the observed aerosol vertical profile against an exponentially decreasing profile, we find a small sensitivity for the surface DRE, but larger for the atmospheric column and the top of the atmosphere. Under all-sky conditions, when continental aerosols are lifted higher in the atmosphere, the outgoing shortwave radiation at TOA decreases, due to the increase of UV and visible radiation absorption by particles while higher oceanic aerosols generally increase the outgoing shortwave radiation through more efficient backscatter and decrease of the NIR radiation absorption by atmospheric gases below aerosol particles. © 2019 Elsevier B.V.
英文关键词	Aerosol-clouds interaction; Atmospheric absorption; Atmospheric aerosols; Direct radiative effect; Radiation transfer model; Vertical profiles
语种	英语
scopus关键词	Air pollution; Arid regions; Optical properties; Solar radiation; Aerosol clouds; Atmospheric absorption; Radiation transfer model; Radiative effects; Vertical profile; Atmospheric aerosols; absorption; aerosol; atmospheric modeling; CALIOP; optical depth; radiative forcing; radiative transfer; vertical distribution; vertical profile
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162122
作者单位	Department of Environment, University of the Aegean, Mytilene, Greece; Laboratory of Meteorology, Department of Physics, University of Ioannina, Ioannina, Greece; Department of Physics, University of Crete, Heraklion, Greece
推荐引用方式 GB/T 7714	Korras-Carraca M.B.,Pappas V.,Hatzianastassiou N.,et al. Global vertically resolved aerosol direct radiation effect from three years of CALIOP data using the FORTH radiation transfer model[J],2019,224.
APA	Korras-Carraca M.B.,Pappas V.,Hatzianastassiou N.,Vardavas I.,&Matsoukas C..(2019).Global vertically resolved aerosol direct radiation effect from three years of CALIOP data using the FORTH radiation transfer model.Atmospheric Research,224.
MLA	Korras-Carraca M.B.,et al."Global vertically resolved aerosol direct radiation effect from three years of CALIOP data using the FORTH radiation transfer model".Atmospheric Research 224(2019).