A new divergence method to quantify methane emissions using observations of Sentinel-5P TROPOMI

doi:10.1029/2021GL094151

We present a new divergence method to estimated methane (CH₄) emissions from satellite observed mean mixing ratio of methane (XCH4) by deriving the regional enhancement of XCH4 in the Planetary Boundary Layer (PBL). The applicability is proven by comparing the estimated emissions with its known emission inventory from a 3-month GEOS-Chem simulation. When applied to TROPOspheric Monitoring Instrument (TROPOMI) observations, sources from well-known oil/gas production areas, livestock farms and wetlands in Texas become clearly visible in the emission maps. The calculated yearly averaged total CH₄ emission over the Permian Basin is 3.06 [2.82, 3.78] Tg a-1 for 2019, which is consistent with previous studies and double that of EDGAR v4.3.2 for 2012. Sensitivity tests on PBL heights, on the derived regional background and on wind speeds suggest our divergence method is quite robust. It is also a fast and simple method to estimate the CH₄ emissions globally.

DOI	10.1029/2021GL094151
	A new divergence method to quantify methane emissions using observations of Sentinel-5P TROPOMI
	Mengyao Liu; Ronald van der A; Michiel van Weele; Henk Eskes; Xiao Lu; Pepijn Veefkind; Jos de Laat; Hao Kong; Jingxu Wang; Jiyunting Sun; Jieying Ding; Yuanhong Zhao; Hongjian Weng
	2021-09-13
发表期刊	Geophysical Research Letters
出版年	2021
英文摘要	We present a new divergence method to estimated methane (CH₄) emissions from satellite observed mean mixing ratio of methane (XCH4) by deriving the regional enhancement of XCH4 in the Planetary Boundary Layer (PBL). The applicability is proven by comparing the estimated emissions with its known emission inventory from a 3-month GEOS-Chem simulation. When applied to TROPOspheric Monitoring Instrument (TROPOMI) observations, sources from well-known oil/gas production areas, livestock farms and wetlands in Texas become clearly visible in the emission maps. The calculated yearly averaged total CH₄ emission over the Permian Basin is 3.06 [2.82, 3.78] Tg a-1 for 2019, which is consistent with previous studies and double that of EDGAR v4.3.2 for 2012. Sensitivity tests on PBL heights, on the derived regional background and on wind speeds suggest our divergence method is quite robust. It is also a fast and simple method to estimate the CH₄ emissions globally.
领域	气候变化
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/338726
专题	气候变化
推荐引用方式 GB/T 7714	Mengyao Liu,Ronald van der A,Michiel van Weele,et al. A new divergence method to quantify methane emissions using observations of Sentinel-5P TROPOMI[J]. Geophysical Research Letters,2021.
APA	Mengyao Liu.,Ronald van der A.,Michiel van Weele.,Henk Eskes.,Xiao Lu.,...&Hongjian Weng.(2021).A new divergence method to quantify methane emissions using observations of Sentinel-5P TROPOMI.Geophysical Research Letters.
MLA	Mengyao Liu,et al."A new divergence method to quantify methane emissions using observations of Sentinel-5P TROPOMI".Geophysical Research Letters (2021).

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