DOI: 10.1002/2014GL060934
论文题名: Surface and free tropospheric sources of methanesulfonic acid over the tropical Pacific Ocean
作者: Zhang Y. ; Wang Y. ; Gray B.A. ; Gu D. ; Mauldin L. ; Cantrell C. ; Bandy A.
刊名: Geophysical Research Letters
ISSN: 0094-9933
EISSN: 1944-9664
出版年: 2014
卷: 41, 期: 14 起始页码: 5239
结束页码: 5245
语种: 英语
英文关键词: degassing
; MSA
; new particle formation
; oceanic source
; sulfur
Scopus关键词: Aerosols
; Degassing
; Organic acids
; Sulfur
; Sulfur compounds
; Tropics
; Aerosol-cloud interaction
; Chemical transport models
; Marine environment
; Methane sulfonic acid
; MSA
; New particle formation
; oceanic source
; Tropical Pacific ocean
; Troposphere
; aerosol
; boundary layer
; marine environment
; sulfate
; tropical environment
; troposphere
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: The production of sulfate aerosols through sulfur chemistry in marine environments is critical to the tropical climate system. However, not all sulfur compounds have been studied in detail. One such compound is methanesulfonic acid (MSA). In this study, we use a one-dimensional chemical transport model to analyze the observed vertical profiles of gas phase MSA during the Pacific Atmospheric Sulfur Experiment. The observed sharp decrease in MSA from the surface to 600 m implies a surface source of 4.0 × 107 molecules/cm2/s. Evidence suggests that this source is photolytically enhanced in daytime. We also find that the observed large increase of MSA from the boundary layer into the lower free troposphere (1000-2000 m) results mainly from the degassing of MSA from dehydrated aerosols. We estimate a source of 1.2 × 107 molecules/cm2/s to the free troposphere through this pathway. This source of soluble MSA could potentially provide an important precursor for new particle formation in the free troposphere over the tropics, affecting the climate system through aerosol-cloud interactions. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904273532&doi=10.1002%2f2014GL060934&partnerID=40&md5=29ceb7bccf128f2057761f1ab24b956b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7197
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
Recommended Citation:
Zhang Y.,Wang Y.,Gray B.A.,et al. Surface and free tropospheric sources of methanesulfonic acid over the tropical Pacific Ocean[J]. Geophysical Research Letters,2014-01-01,41(14).