干旱区生态环境知识资源中心(Arid): Major Element Signatures of Silicate Dust Deposited on the West African Margin: Links With Transport Patterns and Provenance Regions

Arid

DOI	10.1029/2021JD035030
	Major Element Signatures of Silicate Dust Deposited on the West African Margin: Links With Transport Patterns and Provenance Regions
	Le Quilleuc, Meryll; Bory, Aloys Jean-Mathias; Philippe, Sylvie; Derimian, Yevgeny; Skonieczny, Charlotte; Petit, Jean-Eudes; Ponleve, Deborah; Diallo, Aboubacry; Ndiaye, Thierno; Alaimo, Veronique; Louis, Quentin; Tribovillard, Nicolas; Bout-Roumazeilles, Viviane
通讯作者	Bory, AJM (corresponding author), Univ Lille, Univ Littoral Cote Opale, CNRS, UMR 8187,LOG Lab Oceanol & Geosci, Lille, France.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
卷号	126 期号:20
英文摘要	Mineral dust deposition characteristics are poorly constrained, even in the Northeastern Tropical Atlantic Ocean, which is immediately downwind of the Saharan desert and the largest marine repository of aeolian dust in the world. Here, we report on a 2-year (March 2013-February 2015) time series of deposited dust on the Senegalese margin. This record enables us to document the chemical variability (major elements) of the settling Saharan dust (<30 mu m silicate fraction, i.e., carbonate-free) at a resolution varying from one week to one day, along with the deposition flux. This continuous time series reveals a greater geochemical diversity than previously reported, particularly during the dry winter-spring season when continental trade winds sweep across vast regions of West Africa at low atmospheric levels before reaching the sampling site. By contrast, during major deposition events, which make up for most of the yearly flux, our record shows that Saharan dust chemical composition displays much narrower ranges. Trajectory analyses indicate that these relatively well-defined chemical signatures are due to the limited number of provenance sectors involved during major deposition occurrences. The chemical characterization of the dust deposited during these events, hence, allows identifying the major element fingerprint of the related source regions, the most important one being a sizable area at the border of Algeria and Mali including the Tanezrouft desert north of the Taoudeni basin. Also, since these major events are associated with major Saharan outbreaks, they provide estimations of the prevailing elemental signatures for Saharan dust impacting the Northeastern Tropical Atlantic Ocean.
英文关键词	Saharan dust deposition flux major elements Senegal Tropical Atlantic Ocean back trajectography dust sources Tanezrouft desert
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000711482400028
WOS关键词	LAST GLACIAL MAXIMUM ; MINERAL DUST ; SAHARAN DUST ; MONSOON VARIABILITY ; ATLANTIC SEDIMENTS ; FLUXES ; OCEAN ; IRON ; MAURITANIA ; RETRIEVAL
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	French National Research Institute for Sustainable Development ; E17
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368263
作者单位	[Le Quilleuc, Meryll; Bory, Aloys Jean-Mathias; Philippe, Sylvie; Ponleve, Deborah; Louis, Quentin; Tribovillard, Nicolas; Bout-Roumazeilles, Viviane] Univ Lille, Univ Littoral Cote Opale, CNRS, UMR 8187,LOG Lab Oceanol & Geosci, Lille, France; [Derimian, Yevgeny] Univ Lille, CNRS, UMR 8518, LOA Lab Opt Atmospherique, Lille, France; [Skonieczny, Charlotte] Univ Paris Saclay, GEOPS, CNRS, Orsay, France; [Petit, Jean-Eudes] Lab Sci Climat & Environm, UMR 8212, Gif Sur Yvette, France; [Diallo, Aboubacry; Ndiaye, Thierno] IMAGO, US 191, IRD, Dakar, Senegal; [Alaimo, Veronique] Univ Lille, UMR 8516, CNRS, LASIRE LAb Specoscopie Interact Reactivite & Envi, Lille, France
推荐引用方式 GB/T 7714	Le Quilleuc, Meryll,Bory, Aloys Jean-Mathias,Philippe, Sylvie,et al. Major Element Signatures of Silicate Dust Deposited on the West African Margin: Links With Transport Patterns and Provenance Regions[J]. French National Research Institute for Sustainable Development, E17,2021,126(20).
APA	Le Quilleuc, Meryll.,Bory, Aloys Jean-Mathias.,Philippe, Sylvie.,Derimian, Yevgeny.,Skonieczny, Charlotte.,...&Bout-Roumazeilles, Viviane.(2021).Major Element Signatures of Silicate Dust Deposited on the West African Margin: Links With Transport Patterns and Provenance Regions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(20).
MLA	Le Quilleuc, Meryll,et al."Major Element Signatures of Silicate Dust Deposited on the West African Margin: Links With Transport Patterns and Provenance Regions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.20(2021).