DOI: 10.1002/2014GL062734
论文题名: Seasonal changes of CO2, CH4, N2O, and SF6 in the upper troposphere/lower stratosphere over the Eurasian continent observed by commercial airliner
作者: Sawa Y. ; Machida T. ; Matsueda H. ; Niwa Y. ; Tsuboi K. ; Murayama S. ; Morimoto S. ; Aoki S.
刊名: Geophysical Research Letters
ISSN: 0094-8860
EISSN: 1944-8591
出版年: 2015
卷: 42, 期: 6 起始页码: 2001
结束页码: 2008
语种: 英语
英文关键词: aircraft observation
; greenhouse gases
; UT/LS
Scopus关键词: Carbon dioxide
; Clouds
; Greenhouse gases
; Troposphere
; Aircraft observations
; Commercial airliner
; Lower stratosphere
; Potential temperature
; Seasonal changes
; Seasonal variation
; Upper troposphere
; UT/LS
; Sulfur hexafluoride
; airborne sensing
; atmospheric chemistry
; greenhouse gas
; seasonal variation
; Eurasia
英文摘要: The seasonal variations of greenhouse gases at about 11km altitude were analyzed from monthly air samples collected aboard a commercial airliner flying between Europe and Japan from April 2012 to March 2014. Compared to lower latitudes, the upper troposphere between 50 and 70°N showed higher CH4 and SF6 and an earlier seasonal phase of CO2. However, N2O values were similar to those in the subtropics. CH4, N2O, and SF6 in the lower stratosphere with potential temperature of up to 50K above the tropopause showed seasonal variations with maxima in November/December and minima in April/May. At potential temperatures of 37.5-50K above the tropopause, SF6 age was estimated to be about 22months in May and 9months in November. This strong seasonal variation is explained by the subsidence of high-stratospheric air in spring and the effective flushing of the lowermost stratospheric air with tropospheric air in autumn. Key Points Higher CH4, SF6 at high latitudes in upper troposphere compared to subtropics Larger seasonal CO2 changes at the high latitudes in the upper troposphere Clear SF6 maximum in autumn in LS from tropospheric influences ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927799360&doi=10.1002%2f2014GL062734&partnerID=40&md5=d90b79123e44342ea09a0f814e141eae
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8476
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: Meteorological Research Institute (MRI), Tsukuba, Japan
Recommended Citation:
Sawa Y.,Machida T.,Matsueda H.,et al. Seasonal changes of CO2, CH4, N2O, and SF6 in the upper troposphere/lower stratosphere over the Eurasian continent observed by commercial airliner[J]. Geophysical Research Letters,2015-01-01,42(6).