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DOI10.3390/rs16071149
Satellite-Derived Estimate of City-Level Methane Emissions from Calgary, Alberta, Canada
Xing, Zhenyu; Barchyn, Thomas E.; Vollrath, Coleman; Gao, Mozhou; Hugenholtz, Chris
发表日期2024
EISSN2072-4292
起始页码16
结束页码7
卷号16期号:7
英文摘要Cities are important sources of anthropogenic methane emissions. Municipal governments can play a role in reducing those emissions to support climate change mitigation, but they need information on the emission rate to contextualize mitigation actions and track progress. Herein, we examine the application of satellite data from the TROPOspheric Monitoring Instrument (TROPOMI) to estimate city-level methane emission rates in a case study of the City of Calgary, Alberta, Canada. Due to low and variable annual observational coverage, we integrated valid TROPOMI observations over three years (2020-2022) and used mass balance modeling to derive a long-term mean estimate of the emission rate. The resulting column-mean dry-air mole fraction (XCH4) enhancement over Calgary was small (4.7 ppb), but within the city boundaries, we identified local hot spots in the vicinity of known emission sources (wastewater treatment facilities and landfills). The city-level emission estimate from mass balance was 215.4 +/- 132.8 t CH4/d. This estimate is approximately four times larger than estimates from Canada's gridded National Inventory Report of anthropogenic CH4 emissions and six times larger than the Emissions Database for Global Atmospheric Research (EDGAR v8.0). We note that valid TROPOMI observations are more common in warmer months and occur during a narrow daily overpass time slot over Calgary. The limited valid observations in combination with the constrained temporal observational coverage may bias the emission estimate. Overall, the findings from this case study highlight an approach to derive a screening-level estimate of city-level methane emission rates using TROPOMI data in settings with low observational coverage.
英文关键词methane; TROPOMI; mass balance; emission estimate; city level
语种英语
WOS研究方向Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号WOS:001201578800001
来源期刊REMOTE SENSING
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/300260
作者单位University of Calgary
推荐引用方式
GB/T 7714
Xing, Zhenyu,Barchyn, Thomas E.,Vollrath, Coleman,et al. Satellite-Derived Estimate of City-Level Methane Emissions from Calgary, Alberta, Canada[J],2024,16(7).
APA Xing, Zhenyu,Barchyn, Thomas E.,Vollrath, Coleman,Gao, Mozhou,&Hugenholtz, Chris.(2024).Satellite-Derived Estimate of City-Level Methane Emissions from Calgary, Alberta, Canada.REMOTE SENSING,16(7).
MLA Xing, Zhenyu,et al."Satellite-Derived Estimate of City-Level Methane Emissions from Calgary, Alberta, Canada".REMOTE SENSING 16.7(2024).
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