气候变化领域集成服务门户(CCPortal): Direct and semi-direct radiative forcing of biomass-burning aerosols over the southeast Atlantic (SEA) and its sensitivity to absorbing properties: a regional climate modeling study

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DOI	10.5194/acp-20-13191-2020
	Direct and semi-direct radiative forcing of biomass-burning aerosols over the southeast Atlantic (SEA) and its sensitivity to absorbing properties: a regional climate modeling study
	Mallet M.; Solmon F.; Nabat P.; Elguindi N.; Waquet F.; Bouniol D.; Mark Sayer A.; Meyer K.; Roehrig R.; Michou M.; Zuidema P.; Flamant C.; Redemann J.; Formenti P.
发表日期	2020
ISSN	16807316
起始页码	13191
结束页码	13216
卷号	20 期号:21
英文摘要	Simulations are performed for the period 2000- 2015 by two different regional climate models, ALADIN and RegCM, to quantify the direct and semi-direct radiative effects of biomass-burning aerosols (BBAs) in the southeast Atlantic (SEA) region. Different simulations have been performed using strongly absorbing BBAs in accordance with recent in situ observations over the SEA. For the July-August-September (JAS) season, the single scattering albedo (SSA) and total aerosol optical depth (AOD) simulated by the ALADIN and RegCM models are consistent with the MACv2 climatology and MERRA-2 and CAMSRA reanalyses near the biomass-burning emission sources. However, the above-cloud AOD is slightly underestimated compared to satellite (MODIS and POLDER) data during the transport over the SEA. The direct radiative effect exerted at the continental and oceanic surfaces by BBAs is significant in both models and the radiative effects at the top of the atmosphere indicate a remarkable regional contrast over SEA (in all-sky conditions), with a cooling (warming) north (south) of 10 °S, which is in agreement with the recent MACv2 climatology. In addition, the two models indicate that BBAs are responsible for an important shortwave radiative heating of ∼ 0:5-1K per day over SEA during JAS with maxima between 2 and 4 km a.m.s.l. (above mean sea level). At these altitudes, BBAs increase air temperature by ∼ 0:2-0.5 K, with the highest values being co-located with low stratocumulus clouds. Vertical changes in air temperature limit the subsidence of air mass over SEA, creating a cyclonic anomaly. The opposite effect is simulated over the continent due to the increase in lower troposphere stability. The BBA semidirect effect on the lower troposphere circulation is found to be consistent between the two models. Changes in the cloud fraction are moderate in response to the presence of smoke, and the models differ over the Gulf of Guinea. Finally, the results indicate an important sensitivity of the direct and semidirect effects to the absorbing properties of BBAs. Over the stratocumulus (Sc) region, DRE varies from C0:94Wm-2 (scattering BBAs) to C3:93Wm-2 (most absorbing BBAs). © Author(s) 2020.
语种	英语
scopus关键词	aerosol; albedo; biomass burning; climate modeling; climatology; optical depth; radiative forcing; regional climate; stratocumulus; troposphere; Atlantic Ocean; Atlantic Ocean (Southeast); Gulf of Guinea
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/143830
作者单位	Centre National de Recherches Météorologiques, UMR3589, Météo-France-CNRS, Toulouse, France; Laboratoire d'Aérologie, UMR 5560, 16 avenue Édouard Belin, Toulouse, 31400, France; Université de Lille, CNRS, UMR 8518, LOA - Laboratoire d'Optique Atmosphérique, Lille, 59000, France; GESTAR, Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL, United States; LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, Paris, France; School of Meteorology, University of Oklahoma, Norman, OK, United States; LISA, UMR CNRS 7583, Université Paris Est Créteil et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
推荐引用方式 GB/T 7714	Mallet M.,Solmon F.,Nabat P.,et al. Direct and semi-direct radiative forcing of biomass-burning aerosols over the southeast Atlantic (SEA) and its sensitivity to absorbing properties: a regional climate modeling study[J],2020,20(21).
APA	Mallet M..,Solmon F..,Nabat P..,Elguindi N..,Waquet F..,...&Formenti P..(2020).Direct and semi-direct radiative forcing of biomass-burning aerosols over the southeast Atlantic (SEA) and its sensitivity to absorbing properties: a regional climate modeling study.Atmospheric Chemistry and Physics,20(21).
MLA	Mallet M.,et al."Direct and semi-direct radiative forcing of biomass-burning aerosols over the southeast Atlantic (SEA) and its sensitivity to absorbing properties: a regional climate modeling study".Atmospheric Chemistry and Physics 20.21(2020).