globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG004356
Scopus记录号: 2-s2.0-85042544839
论文题名:
Source Partitioning of Methane Emissions and its Seasonality in the U.S. Midwest
作者: Chen Z.; Griffis T.J.; Baker J.M.; Millet D.B.; Wood J.D.; Dlugokencky E.J.; Andrews A.E.; Sweeney C.; Hu C.; Kolka R.K.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:2
起始页码: 646
结束页码: 659
语种: 英语
英文关键词: aerodynamic flux ; Bayesian inversion ; methane source partitioning ; wetland emissions
Scopus关键词: aerodynamics ; anthropogenic source ; atmospheric pollution ; Bayesian analysis ; emission ; environmental protection ; flux measurement ; methane ; partitioning ; seasonality ; temporal variation ; wetland ; Midwest ; United States
英文摘要: The methane (CH4) budget and its source partitioning are poorly constrained in the Midwestern United States. We used tall tower (185 m) aerodynamic flux measurements and atmospheric scale factor Bayesian inversions to constrain the monthly budget and to partition the total budget into natural (e.g., wetlands) and anthropogenic (e.g., livestock, waste, and natural gas) sources for the period June 2016 to September 2017. Aerodynamic flux observations indicated that the landscape was a CH4 source with a mean annual CH4 flux of +13.7 ± 0.34 nmol m−2 s−1 and was rarely a net sink. The scale factor Bayesian inversion analyses revealed a mean annual source of +12.3 ± 2.1 nmol m−2 s−1. Flux partitioning revealed that the anthropogenic source (7.8 ± 1.6 Tg CH4 yr−1) was 1.5 times greater than the bottom-up gridded United States Environmental Protection Agency inventory, in which livestock and oil/gas sources were underestimated by 1.8-fold and 1.3-fold, respectively. Wetland emissions (4.0 ± 1.2 Tg CH4 yr−1) were the second largest source, accounting for 34% of the total budget. The temporal variability of total CH4 emissions was dominated by wetlands with peak emissions occurring in August. In contrast, emissions from oil/gas and other anthropogenic sources showed relatively weak seasonality. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114534
Appears in Collections:气候减缓与适应

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作者单位: Department of Soil, Water, and Climate, University of Minnesota, St. Paul, MN, United States; Agriculture Research Service, United States Department of Agriculture, St. Paul, MN, United States; School of Natural Resources, University of Missouri, Columbia, MO, United States; Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; United States Department of Agriculture-Forest Service, Northern Research Station-Grand Rapids, Grand Rapids, MN, United States

Recommended Citation:
Chen Z.,Griffis T.J.,Baker J.M.,et al. Source Partitioning of Methane Emissions and its Seasonality in the U.S. Midwest[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(2)
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