Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027471 |
Dust Uplift Potential in the Central Sahel: An Analysis Based on 10years of Meteorological Measurements at High Temporal Resolution | |
Bergametti, G.1,2; Marticorena, B.1,2; Rajot, J. L.1,2,3,4; Chatenet, B.1,2; Feron, A.1,2; Gaimoz, C.1,2; Siour, G.1,2; Coulibaly, M.5; Kone, I.5; Maman, A.6; Zakou, A.6 | |
2017-11-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Tunisia; Mali; Niger |
英文摘要 | A 10year data set of wind speed and precipitation recorded in two Sahelian stations located in Niger and Mali is used to investigate the duration and the diurnal and seasonal cycles of high wind speeds and Dust Uplift Potential (DUP). The results indicate that high wind speeds, those greater than the threshold wind velocity required to initiate wind erosion (TWV) over a bare soil occurred in the middle and late morning during the dry and wet seasons but also at nighttime during the wet season. However, the morning wind speeds are only slightly greater than TWV leading to low DUP. On the opposite, the high wind velocities associated to the nocturnal mesoscale convective systems crossing the Sahel during the wet season are responsible for the highest potential wind erosion events. This leads to a strong seasonality of DUP with more than 70% occurring in less than 90days, from mid-April to mid-July. The duration of the high wind speed events is very short since more than 80% last for less than 3h, suggesting that the frequency of the observations performed in SYNOP meteorological stations is not sufficient to correctly quantify the contribution of such events to DUP. Finally, by combining precipitation and DUP, we estimated that precipitation should have a relatively limited role in terms of inhibition of wind erosion in this region with precipitation only affecting 25% of total DUP. |
英文关键词 | dust wind Sahel erosion |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418084500013 |
WOS关键词 | WEST-AFRICA ; DIURNAL CYCLE ; MINERAL DUST ; WIND EROSION ; RAINFALL ESTIMATION ; SEASONAL CYCLES ; NORTH-ATLANTIC ; VARIABILITY ; EMISSION ; SURFACE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32544 |
专题 | 气候变化 |
作者单位 | 1.Univ Paris Est Creteil, CNRS, Lab Interuniv Syst Atmospher LISA, UMR 7583, Paris, France; 2.Univ Paris Diderot, Inst Pierre Simon Laplace IPSL, Paris, France; 3.Univ Paris Diderot, Univ Paris Est Creteil, Univ Pierre & Marie Curie,INRA,UMR IRD 242, Inst Ecol & Sci Environm Paris iEES Paris,CNRS, Paris, France; 4.Inst Reg Arides IRA Medenine, Medenine, Tunisia; 5.Inst Econ Rurale IER, Stn Rech Agron Cinzan, Bamako, Mali; 6.IRD Niamey, Inst Rech Dev IRD, Niamey, Niger |
推荐引用方式 GB/T 7714 | Bergametti, G.,Marticorena, B.,Rajot, J. L.,et al. Dust Uplift Potential in the Central Sahel: An Analysis Based on 10years of Meteorological Measurements at High Temporal Resolution[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(22). |
APA | Bergametti, G..,Marticorena, B..,Rajot, J. L..,Chatenet, B..,Feron, A..,...&Zakou, A..(2017).Dust Uplift Potential in the Central Sahel: An Analysis Based on 10years of Meteorological Measurements at High Temporal Resolution.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(22). |
MLA | Bergametti, G.,et al."Dust Uplift Potential in the Central Sahel: An Analysis Based on 10years of Meteorological Measurements at High Temporal Resolution".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.22(2017). |
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