干旱区生态环境知识资源中心(Arid): Three-dimensional pathways of dust over the Sahara during summer 2011 as revealed by new Infrared Atmospheric Sounding Interferometer observations

Arid

DOI	10.1002/qj.3814
	Three-dimensional pathways of dust over the Sahara during summer 2011 as revealed by new Infrared Atmospheric Sounding Interferometer observations
	Cuesta, Juan; Flamant, Cyrille; Gaetani, Marco; Knippertz, Peter; Fink, Andreas H.; Chazette, Patrick; Eremenko, Maxim; Dufour, Gaelle; Di Biagio, Claudia; Formenti, Paola
通讯作者	Cuesta, J
来源期刊	QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
ISSN	0035-9009
EISSN	1477-870X
出版年	2020
卷号	146 期号:731 页码:2731-2755
英文摘要	We present a new characterisation of the three-dimensional (3D) distribution of dust over the Sahara during summer, exemplified for June 2011. Our approach, called AEROIASI, is based on the innovative retrieval of vertical profiles of the dust extinction coefficient from daily cloud-free hyperspectral Infrared Atmospheric Sounder Interferometer (IASI) satellite observations. AEROIASI observations clearly agree with other widely used measurements (from lidar and radiometers). The 3D characterisation is focused on the dust maximum in June 2011, located in the central Sahara (17-23 degrees N, 1-7 degrees E) and linked to the major atmospheric dynamical drivers associated with the West African Monsoon (WAM) system. AEROIASI shows the near-surface dust load to be dominated by five major emission events occurring every 3-4 days. These all occur when the study region is under the influence of northward bursts of the WAM and convection-related cold pools, likely associated with orographic forcing by the Air Mountains. During the earliest (June 10) and the dustiest (June 17) cases, northward advection of moisture over the hotspot is favoured by the superposition of cyclonic circulations related to an extratropical disturbance northwest of the Sahara and to the Saharan heat low over Mauritania, respectively. Convection over the hotspot also triggers wave-like disturbances that travel westwards. The three dustiest events are characterised by elongated dust fronts moving northwards, with a leading edge spanning 200-300 km horizontally and extending from the surface up to 2 km of altitude. Further south, the dust layer progressively elevates to 3.5 km along the slanted isentropes at the interface of the monsoon and the harmattan, increasingly losing contact with the ground. When northerlies blow over the study region, elevated dust layers at 3-5 km are observed, which are transported southwards within the Saharan air layer and westwards along the northern edge of the African easterly jet (after June 13).
英文关键词	cold pools dust vertical profile haboobs West African monsoon bursts
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000545422000001
WOS关键词	WEST-AFRICAN MONSOON ; INTERTROPICAL DISCONTINUITY REGION ; AEROSOL OPTICAL DEPTH ; EASTERLY WAVES ; DIURNAL CYCLE ; RETRIEVAL PRODUCTS ; CONVECTIVE SYSTEM ; BOUNDARY-LAYER ; NORTH-AFRICA ; DESERT
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324926
作者单位	[Cuesta, Juan; Dufour, Gaelle; Di Biagio, Claudia; Formenti, Paola] Univ Paris, Univ Paris Est Creteil, Lab Interuniv Syst Atmospher, CNRS,UMR 7583, Creteil, France; [Flamant, Cyrille; Gaetani, Marco] Univ Versailles St Quentin, Sorbonne Univ, Lab Atmospheres, Milieux,Observat Spatiales,CNRS,UMR 8190, Paris, France; [Gaetani, Marco] Scuola Univ Super IUSS, Dept Sci Technol & Soc, Pavia, Italy; [Knippertz, Peter; Fink, Andreas H.] Inst Meteorol & Klimaforsch, Karlsruher Inst Technol, Karlsruhe, Germany; [Chazette, Patrick] Univ Versailles St Quentin, Lab Sci Climat & Environm, CNRS, UMR 8212, Saclay, France
推荐引用方式 GB/T 7714	Cuesta, Juan,Flamant, Cyrille,Gaetani, Marco,et al. Three-dimensional pathways of dust over the Sahara during summer 2011 as revealed by new Infrared Atmospheric Sounding Interferometer observations[J],2020,146(731):2731-2755.
APA	Cuesta, Juan.,Flamant, Cyrille.,Gaetani, Marco.,Knippertz, Peter.,Fink, Andreas H..,...&Formenti, Paola.(2020).Three-dimensional pathways of dust over the Sahara during summer 2011 as revealed by new Infrared Atmospheric Sounding Interferometer observations.QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,146(731),2731-2755.
MLA	Cuesta, Juan,et al."Three-dimensional pathways of dust over the Sahara during summer 2011 as revealed by new Infrared Atmospheric Sounding Interferometer observations".QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 146.731(2020):2731-2755.