DOI: 10.1002/grl.50482
论文题名: Impact of atmospheric transport on the evolution of microphysical and optical properties of Saharan dust
作者: Ryder C.L. ; Highwood E.J. ; Lai T.M. ; Sodemann H. ; Marsham J.H.
刊名: Geophysical Research Letters
ISSN: 0094-9073
EISSN: 1944-8804
出版年: 2013
卷: 40, 期: 10 起始页码: 2433
结束页码: 2438
语种: 英语
英文关键词: aircraft measurements
; deposition
; dust
; saharan air layer
; size distribution
; transport
Scopus关键词: Aircraft measurement
; Atmospheric transport
; Effective diameter
; Radiation balance
; Saharan air layers
; Single scattering albedo
; transport
; Vertical structures
; Aircraft
; Atmospheric movements
; Deposition
; Size distribution
; Dust
; aircraft
; albedo
; atmospheric deposition
; atmospheric pollution
; atmospheric transport
; dust
; mineral
; optical property
; particle size
; physical activity
; radiation balance
; size distribution
; Atlantic Ocean
; Sahara
英文摘要: Saharan dust affects the climate by altering the radiation balance and by depositing minerals to the Atlantic Ocean. Both are dependent on particle size. We present aircraft measurements comprising 42 profiles of size distribution (0.1-300 μm), representing freshly uplifted dust, regional aged dust, and dust in the Saharan Air Layer (SAL) over the Canary Islands. The mean effective diameter of dust in SAL profiles is 4.5 μm smaller than that in freshly uplifted dust, while the vertical structure changes from a low shallow layer (0-1.5 km) to a well-mixed deep Saharan dust layer (0-5 km). Size distributions show a loss of 60 to 90% of particles larger than 30 μm 12 h after uplift. The single scattering albedo (SSA) increases from 0.92 to 0.94 to 0.95 between fresh, aged, and SAL profiles: this is enough to alter heating rates by 26%. Some fresh dust close to the surface shows SSA as low as 0.85. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879941745&doi=10.1002%2fgrl.50482&partnerID=40&md5=25a3c53ce56044eec2d4f805983633be
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6337
Appears in Collections: 气候减缓与适应
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作者单位: Department of Meteorology, University of Reading, Earley Gate, Reading, RG6 6BB, United Kingdom
Recommended Citation:
Ryder C.L.,Highwood E.J.,Lai T.M.,et al. Impact of atmospheric transport on the evolution of microphysical and optical properties of Saharan dust[J]. Geophysical Research Letters,2013-01-01,40(10).