| DOI: | 10.1002/2015GL063078
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| 论文题名: | Quantifying global dust devil occurrence from meteorological analyses |
| 作者: | Jemmett-Smith B.C.; Marsham J.H.; Knippertz P.; Gilkeson C.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8942
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| EISSN: | 1944-8673
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| 出版年: | 2015
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| 卷: | 42, 期:4 | | 起始页码: | 1275
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| 结束页码: | 1282
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| 语种: | 英语
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| 英文关键词: | climatology
; dry convection
; dust devils
; dust emission
; dusty plumes
; vortices
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| Scopus关键词: | Budget control
; Climatology
; Uncertainty analysis
; Vortex flow
; Weather forecasting
; Dry convection
; Dust devils
; Dust emission
; Dusty plumes
; Emission values
; European centre for medium-range weather forecasts
; Meteorological analysis
; Operational analysis
; Dust
; convective system
; dust devil
; meteorology
; plume
; quantitative analysis
; thermodynamics
; uncertainty analysis
; uplift
; weather forecasting
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| 英文摘要: | Dust devils and nonrotating dusty plumes are effective uplift mechanisms for fine particles, but their contribution to the global dust budget is uncertain. By applying known bulk thermodynamic criteria to European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses, we provide the first global hourly climatology of potential dust devil and dusty plume (PDDP) occurrence. In agreement with observations, activity is highest from late morning into the afternoon. Combining PDDP frequencies with dust source maps and typical emission values gives the best estimate of global contributions of 3.4% (uncertainty 0.9-31%), 1 order of magnitude lower than the only estimate previously published. Total global hours of dust uplift by dry convection are ~0.002% of the dust-lifting winds resolved by ECMWF, consistent with dry convection making a small contribution to global uplift. Reducing uncertainty requires better knowledge of factors controlling PDDP occurrence, source regions, and dust fluxes induced by dry convection. ©2015. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924914677&doi=10.1002%2f2015GL063078&partnerID=40&md5=7abb3647f352af3ee59291ed82aed210
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8558
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| 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: | Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, United Kingdom
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| Recommended Citation: | |
Jemmett-Smith B.C.,Marsham J.H.,Knippertz P.,et al. Quantifying global dust devil occurrence from meteorological analyses[J]. Geophysical Research Letters,2015-01-01,42(4).
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