DOI: 10.1038/ngeo3003
论文题名: Small fraction of marine cloud condensation nuclei made up of sea spray aerosol
作者: Quinn P.K. ; Coffman D.J. ; Johnson J.E. ; Upchurch L.M. ; Bates T.S.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 9 起始页码: 674
结束页码: 679
语种: 英语
Scopus关键词: aerosol
; boundary layer
; condensation
; entrainment
; light scattering
; particle size
; radiation balance
; solar radiation
; supersaturation
; Arctic Ocean
; Atlantic Ocean
; Pacific Ocean
英文摘要: Sea spray aerosols impact Earth's radiation balance by directly scattering solar radiation. They also act as cloud condensation nuclei, thereby altering cloud properties including reflectivity, lifetime and extent. The influence of sea spray aerosol on cloud properties is thought to be particularly strong over remote ocean regions devoid of continental particles. Yet the contribution of sea spray aerosol to the population of cloud condensation nuclei in the marine boundary layer remains poorly understood. Here, using a lognormal-mode-fitting procedure, we isolate sea spray aerosols from measurements of particle size and abundance over the Pacific, Southern, Arctic and Atlantic oceans to determine the contribution of sea spray aerosol to the population of cloud condensation nuclei in the marine boundary layer. On a global basis, with the exception of the high southern latitudes, sea spray aerosol makes a contribution of less than 30% to the cloud condensation nuclei population for air that is supersaturated at 0.1 to 1.0%-the supersaturation range typical of marine boundary layer clouds. Instead, the cloud condensation nuclei population between 70° S and 80° N is composed primarily of non-sea-salt sulfate aerosols, due to large-scale meteorological features that result in entrainment of particles from the free troposphere. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105724
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States; University of Washington, Joint Institute for the Study of the Atmosphere and Ocean, Seattle, WA, United States
Recommended Citation:
Quinn P.K.,Coffman D.J.,Johnson J.E.,et al. Small fraction of marine cloud condensation nuclei made up of sea spray aerosol[J]. Nature Geoscience,2017-01-01,10(9)