DOI: 10.1002/jgrd.50352
论文题名: Vertical structure of aerosols, temperature, and moisture associated with an intense African dust event observed over the eastern Caribbean
作者: Jung E. ; Albrecht B. ; Prospero J.M. ; Jonsson H.H. ; Kreidenweis S.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 4623
结束页码: 4643
语种: 英语
英文关键词: aerosol PSD
; aerosol vertical transport
; Barbados
; cloud processing
; SAL
Scopus关键词: Aerosols
; Dust
; Mixing
; Moisture
; Research aircraft
; Thermodynamics
; Aerosol characterization
; Barbados
; Cloud processing
; Remotely piloted aircraft
; SAL
; Shallow cumulus convection
; Thermodynamic characteristics
; Vertical transports
; Atmospheric movements
; aerosol
; air mass
; aircraft
; boundary layer
; convection
; cumulus
; dust
; particle size
; stratification
; thermodynamics
; water vapor
; Barbados
; Sahara
英文摘要: An unusually intense African dust event affected a large area of the western Atlantic and eastern Caribbean in early April 2010. Measurements made east of Barbados from the Center for Interdisciplinary Remotely Piloted Aircraft Studies (CIRPAS) Twin Otter research aircraft are used to characterize particle size distributions; vertical distributions of aerosols, temperature, and moisture; and processes leading to the observed stratification in the boundary layer. The vertical profiles of various aerosol characterizations were similar on both days and show three layers with distinct aerosol and thermodynamic characteristics: the Saharan Air Layer (SAL; ~2.2 km ± 500 m), a subcloud layer (SCL; surface to ~500 m), and an intermediate layer extending between them. The SAL and SCL display well-mixed aerosol and thermodynamic characteristics; but the most significant horizontal and vertical variations in aerosols and thermodynamics occur in the intermediate layer. The aerosol variability observed in the intermediate layer is likely associated with modification by shallow cumulus convection occurring sometime in the prior history of the air mass as it is advected across the Atlantic. A comparison of the thermodynamic structure observed in the event from its origin over Africa with that when it reached Barbados indicates that the lower part of the SAL was moistened by surface fluxes as the air mass was advected across the Atlantic. Mixing diagrams using aerosol concentrations and water vapor mixing ratios as conserved parameters provide insight into the vertical transports and mixing processes that may explain the observed aerosol and thermodynamic variability in each layer. Key Points Vertical structure and characteristics of SALChanges in PSD due to the cloud processingVertical transports and mixing processes of dust ©2013. American Geophysical Union. All Rights Reserved. 资助项目: N000140810465
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63769
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL, United States; Center for Interdisciplinary Remotely-Piloted Aircraft Studies, Naval Postgraduate School, Monterey CA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins CO, United States
Recommended Citation:
Jung E.,Albrecht B.,Prospero J.M.,et al. Vertical structure of aerosols, temperature, and moisture associated with an intense African dust event observed over the eastern Caribbean[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)