DOI: 10.1002/2017JD027560
Scopus记录号: 2-s2.0-85042139204
论文题名: Atmospheric Ice-Nucleating Particles in the Dusty Tropical Atlantic
作者: Price H.C. ; Baustian K.J. ; McQuaid J.B. ; Blyth A. ; Bower K.N. ; Choularton T. ; Cotton R.J. ; Cui Z. ; Field P.R. ; Gallagher M. ; Hawker R. ; Merrington A. ; Miltenberger A. ; Neel R.R. ; Parker S.T. ; Rosenberg P.D. ; Taylor J.W. ; Trembath J. ; Vergara-Temprado J. ; Whale T.F. ; Wilson T.W. ; Young G. ; Murray B.J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 4 起始页码: 2175
结束页码: 2193
语种: 英语
英文关键词: Atlantic
; dust
; FAAM
; filters
; ice-nucleating particle
; tropical
Scopus关键词: aerosol
; atmospheric deposition
; concentration (composition)
; desert
; dust
; ground-based measurement
; nucleation
; parameterization
; Atlantic Ocean
; Atlantic Ocean (Tropical)
; Cape Verde [Macaronesia]
英文摘要: Desert dust is one of the most important atmospheric ice-nucleating aerosol species around the globe. However, there have been very few measurements of ice-nucleating particle (INP) concentrations in dusty air close to desert sources. In this study we report the concentration of INPs in dust laden air over the tropical Atlantic within a few days' transport of one of the world's most important atmospheric sources of desert dust, the Sahara. These measurements were performed as part of the Ice in Clouds Experiment-Dust campaign based in Cape Verde, during August 2015. INP concentrations active in the immersion mode, determined using a droplet-on-filter technique, ranged from around 102 m−3 at −12°C to around 105 m−3 at −23°C. There is about 2 orders of magnitude variability in INP concentration for a particular temperature, which is determined largely by the variability in atmospheric dust loading. These measurements were made at altitudes from 30 to 3,500 m in air containing a range of dust loadings. The ice active site density (ns) for desert dust dominated aerosol derived from our measurements agrees with several laboratory-based parameterizations for ice nucleation by desert dust within 1 to 2 orders of magnitude. The small variability in ns values determined from our measurements (within about 1 order of magnitude) is striking given that the back trajectory analysis suggests that the sources of dust were geographically diverse. This is consistent with previous work, which indicates that desert dust's ice-nucleating activity is only weakly dependent on source. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114452
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Facility for Airborne Atmospheric Measurements, Cranfield, United Kingdom; National Centre for Atmospheric Science (NCAS), University of Leeds, Leeds, United Kingdom; Centre for Atmospheric Science, School of Earth and Environmental Sciences, University of Manchester, Manchester, United Kingdom; UK Met Office, Exeter, United Kingdom; Defence Science and Technology Laboratory, Salisbury, United Kingdom; British Antarctic Survey, Cambridge, United Kingdom
Recommended Citation:
Price H.C.,Baustian K.J.,McQuaid J.B.,et al. Atmospheric Ice-Nucleating Particles in the Dusty Tropical Atlantic[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)