气候变化领域集成服务门户(CCPortal): Aircraft-based inversions quantify the importance of wetlands and livestock for Upper Midwest methane emissions

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DOI	10.5194/acp-21-951-2021
	Aircraft-based inversions quantify the importance of wetlands and livestock for Upper Midwest methane emissions
	Yu X.; Millet D.B.; Wells KC.; Henze D.K.; Cao H.; Griffis T.J.; Kort E.A.; Plant G.; Deventer M.J.; Kolka R.K.; Tyler Roman D.; Davis K.J.; Desai A.R.; Baier B.C.; McKain K.; Czarnetzki A.C.; Anthony Bloom A.
发表日期	2021
ISSN	1680-7316
起始页码	951
结束页码	971
卷号	21 期号:2
英文摘要	We apply airborne measurements across three seasons (summer, winter and spring 2017-2018) in a multi-inversion framework to quantify methane emissions from the US Corn Belt and Upper Midwest, a key agricultural and wetland source region. Combing our seasonal results with prior fall values we find that wetlands are the largest regional methane source (32 %, 20 [16-23] Gg/d), while livestock (enteric/manure; 25 %, 15 [14-17] Gg/d) are the largest anthropogenic source. Natural gas/petroleum, waste/landfills, and coal mines collectively make up the remainder. Optimized fluxes improve model agreement with independent datasets within and beyond the study timeframe. Inversions reveal coherent and seasonally dependent spatial errors in the WetCHARTs ensemble mean wetland emissions, with an underestimate for the Prairie Pothole region but an overestimate for Great Lakes coastal wetlands. Wetland extent and emission temperature dependence have the largest influence on prediction accuracy; better representation of coupled soil temperature-hydrology effects is therefore needed. Our optimized regional livestock emissions agree well with the Gridded EPA estimates during spring (to within 7 %) but are g≈ 25 % higher during summer and winter. Spatial analysis further shows good top-down and bottom-up agreement for beef facilities (with mainly enteric emissions) but larger (g≈ 30 %) seasonal discrepancies for dairies and hog farms (with > 40 % manure emissions). Findings thus support bottom-up enteric emission estimates but suggest errors for manure; we propose that the latter reflects inadequate treatment of management factors including field application. Overall, our results confirm the importance of intensive animal agriculture for regional methane emissions, implying substantial mitigation opportunities through improved management. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168816
作者单位	Department of Soil, Water, and Climate, University of Minnesota, Saint Paul, MN 55108, United States; Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, United States; Climate and Space Sciences and Engineering Department, University of Michigan, Ann Arbor, MI 48109, United States; ANECO Institut für Umweltschutz GmbH and Co, Hamburg, 21079, Germany; Northern Research Station, US Department of Agriculture Forest Service, Grand Rapids, MN 55744, United States; Department of Meteorology, The Pennsylvania State University, University Park, PA 16802, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI 53706, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, United States; Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Department of Earth and Environmental Sciences, University...
推荐引用方式 GB/T 7714	Yu X.,Millet D.B.,Wells KC.,et al. Aircraft-based inversions quantify the importance of wetlands and livestock for Upper Midwest methane emissions[J],2021,21(2).
APA	Yu X..,Millet D.B..,Wells KC..,Henze D.K..,Cao H..,...&Anthony Bloom A..(2021).Aircraft-based inversions quantify the importance of wetlands and livestock for Upper Midwest methane emissions.Atmospheric Chemistry and Physics,21(2).
MLA	Yu X.,et al."Aircraft-based inversions quantify the importance of wetlands and livestock for Upper Midwest methane emissions".Atmospheric Chemistry and Physics 21.2(2021).