气候变化领域集成服务门户(CCPortal): River Inflow Dominates Methane Emissions in an Arctic Coastal System

CCPortal

DOI	10.1029/2020GL087669
	River Inflow Dominates Methane Emissions in an Arctic Coastal System
	Manning C.C.; Preston V.L.; Jones S.F.; Michel A.P.M.; Nicholson D.P.; Duke P.J.; Ahmed M.M.M.; Manganini K.; Else B.G.T.; Tortell P.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	We present a year-round time series of dissolved methane (CH4), along with targeted observations during ice melt of CH4 and carbon dioxide (CO2) in a river and estuary adjacent to Cambridge Bay, Nunavut, Canada. During the freshet, CH4 concentrations in the river and ice-covered estuary were up to 240,000% saturation and 19,000% saturation, respectively, but quickly dropped by >100-fold following ice melt. Observations with a robotic kayak revealed that river-derived CH4 and CO2 were transported to the estuary and rapidly ventilated to the atmosphere once ice cover retreated. We estimate that river discharge accounts for >95% of annual CH4 sea-to-air emissions from the estuary. These results demonstrate the importance of resolving seasonal dynamics in order to estimate greenhouse gas emissions from polar systems. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Carbon dioxide; Estuaries; Gas emissions; Greenhouse gases; Methane; Rivers; Air emissions; Coastal systems; Dissolved methane; Methane emissions; Polar systems; River discharge; River inflow; Seasonal dynamics; Ice; concentration (composition); dissolved gas; greenhouse gas; ice cover; methane; observational method; river discharge; saturation; snowmelt; time series analysis; Cambridge Bay; Canada; Nunavut; Victoria Island [Canada]
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170366
作者单位	Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; Applied Ocean Physics and Engineering Department, Woods Hole, MA, United States; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Geography, University of Calgary, Calgary, AB, Canada; Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Now at School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada; Department of Botany, University of British Columbia, Vancouver, BC, Canada
推荐引用方式 GB/T 7714	Manning C.C.,Preston V.L.,Jones S.F.,et al. River Inflow Dominates Methane Emissions in an Arctic Coastal System[J],2020,47(10).
APA	Manning C.C..,Preston V.L..,Jones S.F..,Michel A.P.M..,Nicholson D.P..,...&Tortell P.D..(2020).River Inflow Dominates Methane Emissions in an Arctic Coastal System.Geophysical Research Letters,47(10).
MLA	Manning C.C.,et al."River Inflow Dominates Methane Emissions in an Arctic Coastal System".Geophysical Research Letters 47.10(2020).