气候变化领域集成服务门户(CCPortal): The role of aerosol-radiation-cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara

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DOI	10.5194/acp-19-14657-2019
	The role of aerosol-radiation-cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara
	Menut L.; Tuccella P.; Flamant C.; Deroubaix A.; Gaetani M.
发表日期	2019
ISSN	16807316
起始页码	14657
结束页码	14676
卷号	19 期号:23
英文摘要	The aerosol direct and indirect effects are studied over west Africa in the summer of 2016 using the coupled WRF-CHIMERE regional model including aerosol-cloud interaction parameterization. First, a reference simulation is performed and compared with observations acquired during the Dynamics-aerosol-chemistry-cloud interactions in West Africa (DACCIWA) field campaign which took place in June and July 2016. Sensitivity experiments are also designed to gain insights into the impact of the aerosols dominating the atmospheric composition in southern west Africa (one simulation with halved anthropogenic emissions and one with halved mineral dust emissions). The most important effect of aerosol-cloud interactions is found for the mineral dust scenario, and it is shown that halving the emissions of mineral dust decreases the 2 m temperature by 0.5 K and the boundary layer height by 25 m on a monthly average (July 2016) and over the Saharan region. The presence of dust aerosols also increases (decreases) the shortwave (longwave) radiation at the surface by 25 W m-2. It is also shown that the decrease of anthropogenic emissions along the coast has an impact on the mineral dust load over west Africa by increasing their emissions in the Saharan region. It is due to a mechanism where particulate matter concentrations are decreased along the coast, imposing a latitudinal shift of the monsoonal precipitation and, in turn, an increase of the surface wind speed over arid areas, inducing more mineral dust emissions. © 2019 Author(s).
语种	英语
scopus关键词	aerosol; anthropogenic source; atmospheric pollution; cloud cover; concentration (composition); dust; emission; solar radiation; Sahara; West Africa
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/143998
作者单位	Laboratoire de Météorologie Dynamique, Ecole Polytechnique, IPSL Research University, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, CNRS, Route de Saclay, Palaiseau, 91128, France; CETEMPS, Departement of Physical and Chemical Sciences, Center of Excellence in Telesening of Environment and Model Prediction of Severe Events, University of l'Aquila, L'Aquila, Italy; LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, Paris, 75252, France; Scuola Universitaria Superiore IUSS, Pavia, Italy
推荐引用方式 GB/T 7714	Menut L.,Tuccella P.,Flamant C.,et al. The role of aerosol-radiation-cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara[J],2019,19(23).
APA	Menut L.,Tuccella P.,Flamant C.,Deroubaix A.,&Gaetani M..(2019).The role of aerosol-radiation-cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara.Atmospheric Chemistry and Physics,19(23).
MLA	Menut L.,et al."The role of aerosol-radiation-cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara".Atmospheric Chemistry and Physics 19.23(2019).