Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.atmosenv.2016.10.051 |
Role of surface wind and vegetation cover in multi-decadal variations of dust emission in the Sahara and Sahel | |
Kim, Dongchul1,2; Chin, Mian2; Remer, Lorraine A.3; Diehl, Thomas1,2,6; Bian, Huisheng2,3; Yu, Hongbin2,4; Brown, Molly E.2,4; Stockwell, William R.5 | |
通讯作者 | Kim, Dongchul |
来源期刊 | ATMOSPHERIC ENVIRONMENT
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ISSN | 1352-2310 |
EISSN | 1873-2844 |
出版年 | 2017 |
卷号 | 148页码:282-296 |
英文摘要 | North Africa, the world’s largest dust source, is non-uniform, consisting of a permanently arid region (Sahara), a semi-arid region (Sahel), and a relatively moist vegetated region (Savanna), each with very different rainfall patterns and surface conditions. This study aims to better understand the controlling factors that determine the variation of dust emission in North Africa over a 27-year period from 1982 to 2008, using observational data and model simulations. The results show that the model-derived Saharan dust emission is only correlated with the 10-rn winds (W10m) obtained from reanalysis data, but the model-derived Sahel dust emission is correlated with both W10m and the Normalized Difference Vegetation Index (NDVI) that is obtained from satellite. While the Saharan dust accounts for 82% of the continental North Africa dust emission (1340-1570 Tg year in the 27-year average, the Sahel accounts for 17% with a larger seasonal and inter-annual variation (230-380 Tg year(-1)), contributing about a quarter of the transatlantic dust transported to the northern part of South America. The decreasing dust emission trend over the 27-year period is highly correlated with W10m over the Sahara (R = 0.92). Over the Sahel, the dust emission is correlated with WIOm (R = 0.69) but is also anti-correlated with the trend of NDVI (R =-0.65). WIOm is decreasing over both the Sahara and the Sahel between 1982 and 2008, and the trends are correlated (R = 0.53), suggesting that Saharan/Sahelian surface winds are a coupled system, driving the inter-annual variation of dust emission. (C) 2016 Elsevier Ltd. All rights reserved. |
英文关键词 | Dust emission Surface wind NDVI GOCART model North Africa Sahel |
类型 | Article |
语种 | 英语 |
国家 | USA ; Italy |
收录类别 | SCI-E |
WOS记录号 | WOS:000389394900026 |
WOS关键词 | CONVECTION-PERMITTING SIMULATIONS ; ATLANTIC CLIMATE VARIABILITY ; DESERT DUST ; GOCART MODEL ; MINERAL DUST ; AFRICAN DUST ; CIRCULATION PATTERNS ; NORTHERN-HEMISPHERE ; AEROSOL VARIATIONS ; WEATHER ANOMALIES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/197646 |
作者单位 | 1.Univ Space Res Assoc, Columbia, MD 21046 USA; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 3.JCET UMBC, Baltimore, MD USA; 4.Univ Maryland, College Pk, MD 20742 USA; 5.Howard Univ, Washington, DC 20059 USA; 6.European Commiss, Joint Res Ctr, Ispra, Italy |
推荐引用方式 GB/T 7714 | Kim, Dongchul,Chin, Mian,Remer, Lorraine A.,et al. Role of surface wind and vegetation cover in multi-decadal variations of dust emission in the Sahara and Sahel[J],2017,148:282-296. |
APA | Kim, Dongchul.,Chin, Mian.,Remer, Lorraine A..,Diehl, Thomas.,Bian, Huisheng.,...&Stockwell, William R..(2017).Role of surface wind and vegetation cover in multi-decadal variations of dust emission in the Sahara and Sahel.ATMOSPHERIC ENVIRONMENT,148,282-296. |
MLA | Kim, Dongchul,et al."Role of surface wind and vegetation cover in multi-decadal variations of dust emission in the Sahara and Sahel".ATMOSPHERIC ENVIRONMENT 148(2017):282-296. |
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