DOI: 10.1002/2017JD027702
Scopus记录号: 2-s2.0-85041998732
论文题名: Hygroscopicity- and Size-Resolved Measurements of Submicron Aerosol on the East Coast of the United States
作者: Phillips B.N. ; Royalty T.M. ; Dawson K.W. ; Reed R. ; Petters M.D. ; Meskhidze N.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 3 起始页码: 1826
结束页码: 1839
语种: 英语
英文关键词: aerosol hygroscopicity
; coastal boundary layer
; hygroscopicity tandem differential mobility analyzer
; submicron aerosol
英文摘要: Atmospheric measurements of aerosol size-resolved hygroscopicity at submicron sizes are carried out at the United States Army Corps of Engineers Field Research Facility in Duck, North Carolina. The scientific aim of the field deployment is to gain improved understanding of the springtime advection of aerosols from the East Coast of the United States over the Atlantic and help to constrain assessments of anthropogenic particle contributions to the marine boundary layer aerosol budget. Air mass back trajectories show that the aerosol sampled at the coast is largely of continental origin that either gets transported directly from the land or spends some time over the Atlantic Ocean. Aerosol size-resolved hygroscopicity measurements are consistent with air masses of both continental and marine background that are heavily influenced by the continental outflow. Aitken and accumulation mode mean diameters range from 49.1 ± 1.7 nm to 66.9 ± 0.8 nm and 142.8 ± 1.1 nm to 155.0 ± 2.8 nm, respectively. Hygroscopicity distributions for 96 nm, 188 nm, and 284 nm dry-sized particles show the mode hygroscopicity parameter range from 0.20 ± 0.01 to 0.54 ± 0.03, suggesting the presence of anthropogenic aerosols. We have used the method described by Royalty et al. (2017) to decompose the hygroscopicity distributions into three distinct classes based on the ambient aerosol hygroscopic properties relative to the hygroscopic properties of a reference compound. The method shows that continental outflow heavily influences aerosol chemical and physical properties at the East Coast, with hygroscopicities of submicron aerosols consistent with sulfate-containing species (62% to 83%), with small contributions from sodium- and carbon-containing particles (up to 9% and 37%, respectively). ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114479
Appears in Collections: 气候减缓与适应
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作者单位: Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States; Department of Applied Ecology, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Phillips B.N.,Royalty T.M.,Dawson K.W.,et al. Hygroscopicity- and Size-Resolved Measurements of Submicron Aerosol on the East Coast of the United States[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(3)