干旱区生态环境知识资源中心(Arid): Climate Models and Remote Sensing Retrievals Neglect Substantial Desert Dust Asphericity

Arid

DOI	10.1029/2019GL086592
	Climate Models and Remote Sensing Retrievals Neglect Substantial Desert Dust Asphericity
	Huang, Yue 1; Kok, Jasper F.1; Kandler, Konrad 2; Lindqvist, Hannakaisa 3; Nousiainen, Timo 3; Sakai, Tetsu 4; Adebiyi, Adeyemi 1; Jokinen, Olli 5
通讯作者	Huang, Yue
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2020
卷号	47 期号:6
英文摘要	Climate models and remote sensing retrievals generally assume that dust aerosols are spherical or spheroidal. However, measurements show that dust aerosols deviate substantially from spherical and spheroidal shapes, as ratios of particle length to width (the aspect ratio) and height to width (height-to-width ratio) deviate substantially from unity. Here, we quantify dust asphericity by compiling dozens of measurements of aspect ratio and height-to-width ratio across the globe. We find that the length is on average 5 times larger than the height and that climate models and remote sensing retrievals underestimate this asphericity by a factor of similar to 3-5. Compiled measurements further suggest that North African dust becomes more aspherical during transport, whereas Asian dust might become less aspherical. We obtain globally-averaged shape distributions, from which we find that accounting for dust asphericity increases gravitational settling lifetime by similar to 20%. This increased lifetime helps explain the underestimation of coarse dust transport by models.
类型	Article
语种	英语
国家	USA ; Germany ; Finland ; Japan
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000529097700015
WOS关键词	SAHARAN-MINERAL-DUST ; LONG-RANGE TRANSPORT ; AFRICAN DUST ; INDIVIDUAL PARTICLE ; OPTICAL-PROPERTIES ; SIZE DISTRIBUTION ; SEA-SALT ; SHAPE ; LIDAR ; AEROSOLS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	University of California, Los Angeles
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318901
作者单位	1.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90032 USA; 2.Tech Univ Darmstadt, Inst Appl Geosci, Darmstadt, Germany; 3.Finnish Meteorol Inst, Helsinki, Finland; 4.Japan Meteorol Agcy, Meteorol Res Inst, Tsukuba, Ibaraki, Japan; 5.Sole Proprietorship, Espoo, Finland
推荐引用方式 GB/T 7714	Huang, Yue,Kok, Jasper F.,Kandler, Konrad,et al. Climate Models and Remote Sensing Retrievals Neglect Substantial Desert Dust Asphericity[J]. University of California, Los Angeles,2020,47(6).
APA	Huang, Yue.,Kok, Jasper F..,Kandler, Konrad.,Lindqvist, Hannakaisa.,Nousiainen, Timo.,...&Jokinen, Olli.(2020).Climate Models and Remote Sensing Retrievals Neglect Substantial Desert Dust Asphericity.GEOPHYSICAL RESEARCH LETTERS,47(6).
MLA	Huang, Yue,et al."Climate Models and Remote Sensing Retrievals Neglect Substantial Desert Dust Asphericity".GEOPHYSICAL RESEARCH LETTERS 47.6(2020).