气候变化领域集成服务门户(CCPortal): Aerosol radiative impact during the summer 2019 heatwave produced partly by an inter-continental Saharan dust outbreak - Part 2: Long-wave and net dust direct radiative effect

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DOI	10.5194/acp-22-1921-2022
	Aerosol radiative impact during the summer 2019 heatwave produced partly by an inter-continental Saharan dust outbreak - Part 2: Long-wave and net dust direct radiative effect
	Sicard, Michael; Cordoba-Jabonero, Carmen; Lopez-Cayuela, Maria-Angeles; Ansmann, Albert; Comeron, Adolfo; Zorzano, Maria-Paz; Rodriguez-Gomez, Alejandro; Munoz-Porcar, Constantino
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	1921
结束页码	1937
卷号	22 期号:3 页码:17
英文摘要	This paper is the companion paper of Cordoba-Jabonero et al. (2021). It deals with the estimation of the long-wave (LW) and net dust direct radiative effect (DRE) during the dust episode that occurred between 23 and 30 June 2019 and was paired with a mega-heatwave. The analysis is performed at two European sites where polarized micro-pulse lidars ran continuously to retrieve the vertical distribution of the dust optical properties: Barcelona, Spain, 23-30 June, and Leipzig, Germany, 29-30 June. The radiative effect is computed with the GAME (global atmospheric model) radiative transfer model separately for the fine- and coarse-mode dust. The instantaneous and daily radiative effect and radiative efficiency (DREff) are provided for the fine-mode, coarsemode and total dust at the surface, top of the atmosphere (TOA) and in the atmosphere. The fine-mode daily LW DRE is low (< 6% of the short-wave (SW) component), which makes the coarse-mode LW DRE the main modulator of the total net dust DRE. The coarse-mode LW DRE starts exceeding (in absolute values) the SW component in the middle of the episode, which produces positive coarse-mode net DRE at both the surface and TOA. Such an unusual tendency is attributed to increasing coarse-mode size and surface temperature throughout the episode. This has the effect of reducing the SW cooling in Barcelona up to the point of reaching total net positive dust DRE (+0.9Wm(-2)) on one occasion at the surface and quasi-neutral (-0.6Wm(-2)) at TOA. When adding the LW component, the total dust SW radiative efficiency is reduced by a factor of 1.6 at both surface (on average over the episode the total dust net DREff is 54.1Wm(-2) tau(-1)) and TOA (-37.3Wm(-2) tau(-1)). A sensitivity study performed on the surface temperature and the air temperature in the dust layer, both linked to the heatwave and upon which the LW DRE strongly depends, shows that the heatwave contributed to reducing the dust net cooling effect at the surface and that it had nearly no effect at TOA. Its subsequent effect was thus to reduce the heating of the atmosphere produced by the dust particles.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000758090000001
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/273473
作者单位	Universitat Politecnica de Catalunya; Institut d'Estudis Espacials de Catalunya (IEEC); Universitat Politecnica de Catalunya; Leibniz Institut fur Tropospharenforschung (TROPOS); Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Centro de Astrobiologia (INTA); University of Aberdeen
推荐引用方式 GB/T 7714	Sicard, Michael,Cordoba-Jabonero, Carmen,Lopez-Cayuela, Maria-Angeles,et al. Aerosol radiative impact during the summer 2019 heatwave produced partly by an inter-continental Saharan dust outbreak - Part 2: Long-wave and net dust direct radiative effect[J],2022,22(3):17.
APA	Sicard, Michael.,Cordoba-Jabonero, Carmen.,Lopez-Cayuela, Maria-Angeles.,Ansmann, Albert.,Comeron, Adolfo.,...&Munoz-Porcar, Constantino.(2022).Aerosol radiative impact during the summer 2019 heatwave produced partly by an inter-continental Saharan dust outbreak - Part 2: Long-wave and net dust direct radiative effect.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(3),17.
MLA	Sicard, Michael,et al."Aerosol radiative impact during the summer 2019 heatwave produced partly by an inter-continental Saharan dust outbreak - Part 2: Long-wave and net dust direct radiative effect".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.3(2022):17.