globalchange  > 气候变化事实与影响
DOI: 10.1002/2015GB005300
Scopus记录号: 2-s2.0-84960153742
论文题名:
Contribution of regional sources to atmospheric methane over the Amazon Basin in 2010 and 2011
作者: Wilson C; , Gloor M; , Gatti L; V; , Miller J; B; , Monks S; A; , McNorton J; , Bloom A; A; , Basso L; S; , Chipperfield M; P
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期:3
起始页码: 400
结束页码: 420
语种: 英语
英文关键词: Amazon ; carbon monoxide ; emissions ; methane ; modeling
Scopus关键词: atmospheric modeling ; atmospheric transport ; biogenic emission ; carbon monoxide ; concentration (composition) ; drought ; ecosystem modeling ; environmental assessment ; methane ; microbial activity ; seasonal variation ; sulfur compound ; three-dimensional modeling ; wetland ; Amazon Basin
英文摘要: We present an assessment of methane (CH4) atmospheric concentrations over the Amazon Basin for 2010 and 2011 using a 3-D atmospheric chemical transport model, two wetland emission models, and new observations made during biweekly flights made over four locations within the basin. We attempt to constrain basin-wide CH4 emissions using the observations, and since 2010 was an unusually dry year, we assess the effect of this drought on Amazonian methane emissions. We find that South American emissions contribute up to 150 ppb to concentrations at the sites, mainly originating from within the basin. Our atmospheric model simulations agree reasonably well with measurements at three of the locations (0.28 ≤ r2 ≤ 0.63, mean bias ≤ 9.5 ppb). Attempts to improve the simulated background CH4 concentration through analysis of simulated and observed sulphur hexafluoride concentrations do not improve the model performance, however. Through minimisation of seasonal biases between the simulated and observed atmospheric concentrations, we scale our prior emission inventories to derive total basin-wide methane emissions of 36.5-41.1 Tg(CH4)/yr in 2010 and 31.6-38.8 Tg(CH4)/yr in 2011. These totals suggest that the Amazon contributes significantly (up to 7%) to global CH4 emissions. Our analysis indicates that factors other than precipitation, such as temperature variations or tree mortality, may have affected microbial emission rates. However, given the uncertainty of our emission estimates, we cannot say definitively whether the noncombustion emissions from the region were different in 2010 and 2011, despite contrasting meteorological conditions between the two years. ©2016. The Authors.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77865
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: National Centre for Earth Observation, University of Leeds, Leeds, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; School of Geography, University of Leeds, Leeds, United Kingdom; Instituto de Pesquisas Energéticas e Nucleares, Comissao Nacional de Energia Nuclear, Atmospheric Chemistry Laboratory, Sao Paulo, Brazil; Global Monitoring Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Now at Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Now at Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States

Recommended Citation:
Wilson C,, Gloor M,, Gatti L,et al. Contribution of regional sources to atmospheric methane over the Amazon Basin in 2010 and 2011[J]. Global Biogeochemical Cycles,2016-01-01,30(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Wilson C]'s Articles
[, Gloor M]'s Articles
[, Gatti L]'s Articles
百度学术
Similar articles in Baidu Scholar
[Wilson C]'s Articles
[, Gloor M]'s Articles
[, Gatti L]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wilson C]‘s Articles
[, Gloor M]‘s Articles
[, Gatti L]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.