气候变化领域集成服务门户(CCPortal): The ice-nucleating activity of African mineral dust in the Caribbean boundary layer

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DOI	10.5194/acp-22-9663-2022
	The ice-nucleating activity of African mineral dust in the Caribbean boundary layer
	Harrison, Alexander D.; O'Sullivan, Daniel; Adams, Michael P.; Porter, Grace C. E.; Blades, Edmund; Brathwaite, Cherise; Chewitt-Lucas, Rebecca; Gaston, Cassandra; Hawker, Rachel; Krueger, Ovid O.; Neve, Leslie; Poehlker, Mira L.; Poehlker, Christopher; Poeschl, Ulrich; Sanchez-Marroquin, Alberto; Sealy, Andrea; Sealy, Peter; Tarn, Mark D.; Whitehall, Shanice; McQuaid, James B.; Carslaw, Kenneth S.; Prospero, Joseph M.; Murray, Benjamin J.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9663
结束页码	9680
卷号	22 期号:14 页码:18
英文摘要	African mineral dust is transported many thousands of kilometres from its source regions, and, because of its ability to nucleate ice, it plays a major role in cloud glaciation around the globe. The ice-nucleating activity of desert dust is influenced by its mineralogy, which varies substantially between source regions and across particle sizes. However, in models it is often assumed that the activity (expressed as active sites per unit surface area as a function of temperature) of atmospheric mineral dust is the same everywhere on the globe. Here, we find that the ice-nucleating activity of African desert dust sampled in the summertime marine boundary layer of Barbados (July and August 2017) is substantially lower than parameterizations based on soil from specific locations in the Sahara or dust sedimented from dust storms. We conclude that the activity of dust in Barbados' boundary layer is primarily defined by the low K-feldspar content of the dust, which is around 1 %. We propose that the dust we sampled in the Caribbean was from a region in western Africa (in and around the Sahel in Mauritania and Mali), which has a much lower feldspar content than other African sources across the Sahara and Sahel.
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:000832642700001
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/273640
作者单位	University of Leeds; University of Miami; Max Planck Society; Leibniz Institut fur Tropospharenforschung (TROPOS); Leipzig University
推荐引用方式 GB/T 7714	Harrison, Alexander D.,O'Sullivan, Daniel,Adams, Michael P.,et al. The ice-nucleating activity of African mineral dust in the Caribbean boundary layer[J],2022,22(14):18.
APA	Harrison, Alexander D..,O'Sullivan, Daniel.,Adams, Michael P..,Porter, Grace C. E..,Blades, Edmund.,...&Murray, Benjamin J..(2022).The ice-nucleating activity of African mineral dust in the Caribbean boundary layer.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(14),18.
MLA	Harrison, Alexander D.,et al."The ice-nucleating activity of African mineral dust in the Caribbean boundary layer".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.14(2022):18.