DOI: 10.1002/2016GL069292
论文题名: No significant increase in long-term CH4 emissions on North Slope of Alaska despite significant increase in air temperature
作者: Sweeney C. ; Dlugokencky E. ; Miller C.E. ; Wofsy S. ; Karion A. ; Dinardo S. ; Chang R.Y.-W. ; Miller J.B. ; Bruhwiler L. ; Crotwell A.M. ; Newberger T. ; McKain K. ; Stone R.S. ; Wolter S.E. ; Lang P.E. ; Tans P.
刊名: Geophysical Research Letters
ISSN: 0094-9709
EISSN: 1944-9440
出版年: 2016
卷: 43, 期: 12 起始页码: 6604
结束页码: 6611
语种: 英语
英文关键词: Arctic
; climate change
; methane
; permafrost
Scopus关键词: Atmospheric chemistry
; Budget control
; Climate change
; Complex networks
; Gas emissions
; Greenhouse gases
; Methane
; Permafrost
; Annual mean temperatures
; Arctic
; Atmospheric methanes
; Biogeochemical process
; Continuous measurements
; North Slope of Alaska
; Strong enhancement
; Temperature sensitivity
; Atmospheric temperature
英文摘要: Continuous measurements of atmospheric methane (CH4) mole fractions measured by NOAA's Global Greenhouse Gas Reference Network in Barrow, AK (BRW), show strong enhancements above background values when winds come from the land sector from July to December from 1986 to 2015, indicating that emissions from arctic tundra continue through autumn and into early winter. Twenty-nine years of measurements show little change in seasonal mean land sector CH4 enhancements, despite an increase in annual mean temperatures of 1.2 ± 0.8°C/decade (2σ). The record does reveal small increases in CH4 enhancements in November and December after 2010 due to increased late-season emissions. The lack of significant long-term trends suggests that more complex biogeochemical processes are counteracting the observed short-term (monthly) temperature sensitivity of 5.0 ± 3.6 ppb CH4/°C. Our results suggest that even the observed short-term temperature sensitivity from the Arctic will have little impact on the global atmospheric CH4 budget in the long term if future trajectories evolve with the same temperature sensitivity. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977492511&doi=10.1002%2f2016GL069292&partnerID=40&md5=d1fad89ac51c03bb9259b5e462b7f63f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10672
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: Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO, United States
Recommended Citation:
Sweeney C.,Dlugokencky E.,Miller C.E.,et al. No significant increase in long-term CH4 emissions on North Slope of Alaska despite significant increase in air temperature[J]. Geophysical Research Letters,2016-01-01,43(12).