DOI: 10.1002/2013GL057895
论文题名: Rapid modification of cloud-nucleating ability of aerosols by biogenic emissions
作者: Ma Y. ; Brooks S.D. ; Vidaurre G. ; Khalizov A.F. ; Wang L. ; Zhang R.
刊名: Geophysical Research Letters
ISSN: 0094-8332
EISSN: 1944-8063
出版年: 2013
卷: 40, 期: 23 起始页码: 6293
结束页码: 6297
语种: 英语
英文关键词: aerosol aging
; biogenic
; CCN
Scopus关键词: Activation potential
; Aerosol aging
; biogenic
; Biogenic volatile organic compounds
; CCN
; Cloud condensation nuclei
; Secondary organic aerosols
; Water soluble organic acids
; Atmospheric aerosols
; Coatings
; Monoterpenes
; Ozone
; Atmospheric composition
; aerosol formation
; aerosol property
; aging
; biogenic emission
; cloud condensation nucleus
; hydrophobicity
; nucleation
; supersaturation
英文摘要: Although secondary organic aerosol formation is well studied, the extent to which oxidation products of biogenic volatile organic compounds condense onto primary aerosols and modify their cloud-nucleating properties remains highly uncertain. Here we show that water-soluble organic acids produced from the reaction between α-pinene and ozone rapidly accumulate onto preexisting particles forming coatings of organic materials that reach a mass fraction of 80-90% within a time period of 30 to 60 min for the reactant conditions of 7 to 37 ppbv α-pinene and 20 ppbv ozone. Cloud condensation nuclei (CCN) measurements reveal that the initially hydrophobic aerosols are rapidly converted to efficient CCN at a supersaturation of 0.22%. Our results imply that changes in the activation potential of a significant fraction of the atmospheric aerosol population are controlled by the formation and composition of coatings formed during the aging process, rather than by the original particle size or composition. Key Points Aging of aerosols by biogenic emissions is faster than previously recognized Biogenic aging of primary aerosols modifies CCN properties CCN activities of aged aerosol do not depend on primary aerosol properties ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891610805&doi=10.1002%2f2013GL057895&partnerID=40&md5=dc42f25bbef7cb468872b4be9c134418
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5596
Appears in Collections: 气候减缓与适应
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作者单位: School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Ma Y.,Brooks S.D.,Vidaurre G.,et al. Rapid modification of cloud-nucleating ability of aerosols by biogenic emissions[J]. Geophysical Research Letters,2013-01-01,40(23).