气候变化领域集成服务门户(CCPortal): Smoke in the river: an Aerosols, Radiation and Clouds in southern Africa (AEROCLO-sA) case study

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DOI	10.5194/acp-22-5701-2022
	Smoke in the river: an Aerosols, Radiation and Clouds in southern Africa (AEROCLO-sA) case study
	Flamant, Cyrille; Gaetani, Marco; Chaboureau, Jean-Pierre; Chazette, Patrick; Cuesta, Juan; Piketh, Stuart John; Formenti, Paola
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	5701
结束页码	5724
卷号	22 期号:8 页码:24
英文摘要	The formation of a river of smoke crossing southern Africa was investigated during the Aerosols, Radiation and Clouds in southern Africa (AEROCLO-sA) campaign in September 2017. A complementary set of global and mesoscale numerical simulations as well as ground-based, airborne and space-borne observations of the dynamics, thermodynamics and composition of the atmosphere are used to characterize the river of smoke in terms of timing and vertical extent of the biomass burning aerosol (BBA) layer. The study area was under the synoptic influence of a coastal low rooted in a tropical easterly wave and a high-pressure system over the continent and westerly waves at mid latitudes, one of which had an embedded cut-off low (CoL). The coastal low interacted with the second of two approaching westerly waves and ultimately formed a mid-level tropical temperate trough (TTT). The TTT created the fast-moving air mass transported to the southwestern Indian Ocean as a river of smoke. The CoL, which developed and intensified in the upper levels associated with the first (easternmost) westerly wave, remained stationary above northern Namibia prior to the formation of the TTT and was responsible for the thickening of the BBA layer. This shows that the evolution of the river of smoke is very much tied to the evolution of the TTT, while its vertical extent is related to the presence of the CoL. The mechanisms by which the CoL, observed over Namibia in the entrance region of the river of smoke, influences the vertical structure of the BBA layer is mainly associated with the ascending motion above the BBA layer. In the presence of the CoL, the top of the BBA layer over northern Namibia reaches altitudes above 8 km. This is much higher than the average height of the top of the BBA layer over the regions where the smoke comes from (Angola, Zambia, Zimbabwe, Mozambique), which is 5 to 6 km. The results suggest that the interaction between the TTTs and the CoLs which form during the winter may have a role in promoting the transport of BBA from fire-prone regions in the tropical band to the temperate mid latitudes and the southwestern Indian Ocean.
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:000789355200001
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/273686
作者单位	UDICE-French Research Universities; Sorbonne Universite; Universite Paris Cite; Universite Paris Saclay; UDICE-French Research Universities; Universite Paris Cite; Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Universite Paris Cite; Universite Paris-Est-Creteil-Val-de-Marne (UPEC); IUSS PAVIA; Universite de Toulouse; Universite Toulouse III - Paul Sabatier; Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Universite Paris Cite; Universite Paris Saclay; CEA; Centre National de la Recherche Scientifique (CNRS); North West University - South Africa
推荐引用方式 GB/T 7714	Flamant, Cyrille,Gaetani, Marco,Chaboureau, Jean-Pierre,et al. Smoke in the river: an Aerosols, Radiation and Clouds in southern Africa (AEROCLO-sA) case study[J],2022,22(8):24.
APA	Flamant, Cyrille.,Gaetani, Marco.,Chaboureau, Jean-Pierre.,Chazette, Patrick.,Cuesta, Juan.,...&Formenti, Paola.(2022).Smoke in the river: an Aerosols, Radiation and Clouds in southern Africa (AEROCLO-sA) case study.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(8),24.
MLA	Flamant, Cyrille,et al."Smoke in the river: an Aerosols, Radiation and Clouds in southern Africa (AEROCLO-sA) case study".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.8(2022):24.