DOI: 10.1002/jgrd.50284
论文题名: Study of atmospheric CH<inf>4</inf> mole fractions at three WMO/GAW stations in China
作者: Fang S.-X. ; Zhou L.-X. ; Masarie K.A. ; Xu L. ; Rella C.W.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 4874
结束页码: 4886
语种: 英语
英文关键词: atmospheric CH4
; backward trajectory
; mole fraction
; observation
; regional station
Scopus关键词: Methane
; Backward trajectory
; Cavity ring down spectroscopies
; Global measurements
; Mole fraction
; Northern Hemispheres
; observation
; Peak to peak amplitudes
; regional station
; Local area networks
; amplitude
; atmospheric deposition
; growth rate
; methane
; Northern Hemisphere
; regional climate
; seasonal variation
; summer
; weather station
; China
英文摘要: Atmospheric CH4 mole fractions were continuously measured from 2009 to 2011 at three WMO/GAW stations in China (Lin'an, LAN; Longfengshan, LFS; and Waliguan, WLG) using three Cavity Ring Down Spectroscopy instruments. LAN and LFS are GAW regional measurement stations. LAN is located in China's most economically developed region, and LFS is in a rice production area (planting area > 40,000 km2). WLG is a global measurement station in remote northwest China. At LAN, high methane mole fractions are observed in all seasons. Surface winds from the northeast enhance CH4 values, with a maximum increase of 32 ± 15 ppb in summer. The peak to peak amplitude of the seasonal cycle is 77 ± 35 ppb. At LFS, the diurnal cycle amplitude is approximately constant throughout the year except summer, when a value of 196 ± 65 ppb is observed. CH4 values at LFS reach their peak in July, which is different from seasonal variations typically observed in the northern hemisphere. CH4 mole fractions at WLG show both the smallest values and the lowest variability. Maximum values occur during summer, which is different from other northern hemisphere WMO/GAW global stations. The seasonal cycle amplitude is 17 ± 11 ppb. The linear growth rates at LAN, LFS, and WLG are 8.0 ± 1.2, 7.9 ± 0.9, and 9.4 ± 0.2 ppb yr -1, respectively, which are all larger than the global mean over the same 3 year period. Results from this study attempt to improve our basic understanding of observed atmospheric CH4 in China. Key Points measurement of atmospheric CH4 at the WMO/GAW stations in Chinathe variations of atmospheric CH4 are studiedthe factors infectng CH4 mole fractions are analysed ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 41175116
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63766
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Chinese Academy of Meteorological Sciences (CAMS), China Meteorological Administration (CMA), Beijing, China; Chinese Academy of Meteorological Sciences (CAMS), China Meteorological Administration (CMA), Beijing 100081, China; NOAA Earth System Research Laboratory, Boulder CO, United States; Picarro, Inc., Santa Clara CA, United States
Recommended Citation:
Fang S.-X.,Zhou L.-X.,Masarie K.A.,et al. Study of atmospheric CH<inf>4</inf> mole fractions at three WMO/GAW stations in China[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)