DOI: 10.1002/2014GL062938
论文题名: Can we use surface wind fields from meteorological reanalyses for Sahelian dust emission simulations?
作者: Largeron Y. ; Guichard F. ; Bouniol D. ; Couvreux F. ; Kergoat L. ; Marticorena B.
刊名: Geophysical Research Letters
ISSN: 0094-8820
EISSN: 1944-8551
出版年: 2015
卷: 42, 期: 7 起始页码: 2490
结束页码: 2499
语种: 英语
英文关键词: deep convection
; reanalyses
; Sahel
; surface winds
; wind erosion
Scopus关键词: Erosion
; Wind
; Deep convection
; Reanalyses
; Sahel
; Surface winds
; Wind erosions
; Dust
; dry season
; dust
; simulation
; soil erosion
; surface wind
; wind field
; wind velocity
英文摘要: The Sahel is prone to intense soil erosion, and the dust emission flux is very sensitive to the surface wind speed. In this study, we use high-frequency observations acquired across the Sahel to assess the ability of three global reanalyses (ERA-interim, NCEP-CFSR and MERRA) to capture the observed surface wind events that are critical to wind erosion. ERA-Interim is shown to perform best. However, all three reanalyses present a too flat annual cycle, with important season-dependent biases: they overestimate the surface wind during dry season nights and underestimate it during spring and monsoon season days. More importantly, the strongest wind speeds, observed in the morning and during deep convective events, are systematically underestimated. As analyzed wind fields are one of the main inputs of many dust emission models, their too low fraction of high wind speeds will lead to major errors in dust emission simulations. ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928705999&doi=10.1002%2f2014GL062938&partnerID=40&md5=3404694aa24087dc420b83fc12e56abb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8436
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Centre National de Recherches Meteorologiques, CNRM-GAME, CNRS, Toulouse, France
Recommended Citation:
Largeron Y.,Guichard F.,Bouniol D.,et al. Can we use surface wind fields from meteorological reanalyses for Sahelian dust emission simulations?[J]. Geophysical Research Letters,2015-01-01,42(7).