DOI: 10.1002/2016GL068194
论文题名: Unexpected high 35S concentration revealing strong downward transport of stratospheric air during the monsoon transitional period in East Asia
作者: Lin M. ; Zhang Z. ; Su L. ; Su B. ; Liu L. ; Tao J. ; Fung J.C.H. ; Thiemens M.H.
刊名: Geophysical Research Letters
ISSN: 0094-9271
EISSN: 1944-9002
出版年: 2016
卷: 43, 期: 5 起始页码: 2315
结束页码: 2322
语种: 英语
英文关键词: East China
; Mount Wuyi
; ozone
; radioactive sulfur-35
; stratosphere-troposphere exchange
; sulfur cycle
Scopus关键词: Aerosols
; Atmospheric thermodynamics
; Biogeochemistry
; Boundary layers
; Budget control
; Carbon dioxide
; Ozone
; Sulfur
; Sulfur dioxide
; Troposphere
; East China
; Mount Wuyi
; Radioactive sulfur-35
; Stratosphere-troposphere exchange
; Sulfur cycles
; Atmospheric movements
英文摘要: October is the monsoon transitional period in East Asia (EA) involving a series of synoptic activities that may enhance the downward transport of stratospheric air to the planetary boundary layer (PBL). Here we use cosmogenic 35S in sulfate aerosols (35SO4 2-) as a tracer for air masses originating from the stratosphere and transported downward to quantify these mixing processes. From 1 year 35SO4 2- measurements (March 2014 to February 2015) at a background station in EA we find remarkably enhanced 35SO4 2- concentration (3150 atoms m-3) in October, the highest value ever reported for natural sulfate aerosols. A four-box 1-D model and meteorological analysis reveal that strong downward transport from the free troposphere is a vital process entraining aged stratospheric air masses to the PBL. The aged stratospheric masses are accumulated in the PBL, accelerating the SO2 transformation to SO4 2-. Implications for the tropospheric O3 budget and the CO2 biogeochemical cycle are discussed. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960370007&doi=10.1002%2f2016GL068194&partnerID=40&md5=757e25f1bd7640378ef105298c9294d5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10234
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, California, United States
Recommended Citation:
Lin M.,Zhang Z.,Su L.,et al. Unexpected high 35S concentration revealing strong downward transport of stratospheric air during the monsoon transitional period in East Asia[J]. Geophysical Research Letters,2016-01-01,43(5).