气候变化领域集成服务门户(CCPortal): Quantifying methane emissions from the global scale down to point sources using satellite observations of atmospheric methane

CCPortal

DOI	10.5194/acp-22-9617-2022
	Quantifying methane emissions from the global scale down to point sources using satellite observations of atmospheric methane
	Jacob, Daniel J.; Varon, Daniel J.; Cusworth, Daniel H.; Dennison, Philip E.; Frankenberg, Christian; Gautam, Ritesh; Guanter, Luis; Kelley, John; McKeever, Jason; Ott, Lesley E.; Poulter, Benjamin; Qu, Zhen; Thorpe, Andrew K.; Worden, John R.; Duren, Riley M.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9617
结束页码	9646
卷号	22 期号:14 页码:30
英文摘要	We review the capability of current and scheduled satellite observations of atmospheric methane in the shortwave infrared (SWIR) to quantify methane emissions from the global scale down to point sources. We cover retrieval methods, precision and accuracy requirements, inverse and mass balance methods for inferring emissions, source detection thresholds, and observing system completeness. We classify satellite instruments as area flux mappers and point source imagers, with complementary attributes. Area flux mappers are high-precision (< 1 %) instruments with 0.1-10 km pixel size designed to quantify total methane emissions on regional to global scales. Point source imagers are fine-pixel (< 60 m) instruments designed to quantify individual point sources by imaging of the plumes. Current area flux mappers include GOSAT (2009-present), which provides a high-quality record for interpretation of long-term methane trends, and TROPOMI (2018-present), which provides global continuous daily mapping to quantify emissions on regional scales. These instruments already provide a powerful resource to quantify national methane emissions in support of the Paris Agreement. Current point source imagers include the GHGSat constellation and several hyperspectral and multispectral land imaging sensors (PRISMA, Sentinel-2, Landsat-8/9, WorldView-3), with detection thresholds in the 100-10 000 kg h(-1) range that enable monitoring of large point sources. Future area flux mappers, including MethaneSAT, GOSAT-GW, Sentinel-5, GeoCarb, and CO2M, will increase the capability to quantify emissions at high resolution, and the MERLIN lidar will improve observation of the Arctic. The averaging times required by area flux mappers to quantify regional emissions depend on pixel size, retrieval precision, observation density, fraction of successful retrievals, and return times in a way that varies with the spatial resolution desired. A similar interplay applies to point source imagers between detection threshold, spatial coverage, and return time, defining an observing system completeness. Expanding constellations of point source imagers including GHGSat and Carbon Mapper over the coming years will greatly improve observing system completeness for point sources through dense spatial coverage and frequent return times.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000832579200001
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/273524
作者单位	Harvard University; University of Arizona; Utah System of Higher Education; University of Utah; California Institute of Technology; California Institute of Technology; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); Environmental Defense Fund; Universitat Politecnica de Valencia; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center
推荐引用方式 GB/T 7714	Jacob, Daniel J.,Varon, Daniel J.,Cusworth, Daniel H.,et al. Quantifying methane emissions from the global scale down to point sources using satellite observations of atmospheric methane[J],2022,22(14):30.
APA	Jacob, Daniel J..,Varon, Daniel J..,Cusworth, Daniel H..,Dennison, Philip E..,Frankenberg, Christian.,...&Duren, Riley M..(2022).Quantifying methane emissions from the global scale down to point sources using satellite observations of atmospheric methane.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(14),30.
MLA	Jacob, Daniel J.,et al."Quantifying methane emissions from the global scale down to point sources using satellite observations of atmospheric methane".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.14(2022):30.