气候变化领域集成服务门户(CCPortal): Methane emissions from underground gas storage in California

CCPortal

DOI	10.1088/1748-9326/ab751d
	Methane emissions from underground gas storage in California
	Thorpe A.K.; Duren R.M.; Conley S.; Prasad K.R.; Bue B.D.; Yadav V.; Foster K.T.; Rafiq T.; Hopkins F.M.; Smith M.L.; Fischer M.L.; Thompson D.R.; Frankenberg C.; McCubbin I.B.; Eastwood M.L.; Green R.O.; Miller C.E.
发表日期	2020
ISSN	17489318
卷号	15 期号:4
英文摘要	Accurate and timely detection, quantification, and attribution of methane emissions from Underground Gas Storage (UGS) facilities is essential for improving confidence in greenhouse gas inventories, enabling emission mitigation by facility operators, and supporting efforts to assess facility integrity and safety. We conducted multiple airborne surveys of the 12 active UGS facilities in California between January 2016 and November 2017 using advanced remote sensing and in situ observations of near-surface atmospheric methane (CH4). These measurements where combined with wind data to derive spatially and temporally resolved methane emission estimates for California UGS facilities and key components with spatial resolutions as small as 1-3 m and revisit intervals ranging from minutes to months. The study spanned normal operations, malfunctions, and maintenance activity from multiple facilities including the active phase of the Aliso Canyon blowout incident in 2016 and subsequent return to injection operations in summer 2017. We estimate that the net annual methane emissions from the UGS sector in California averaged between 11.0 3.8 GgCH4 yr-1 (remote sensing) and 12.3 3.8 GgCH4 yr-1 (in situ). Net annual methane emissions for the 7 facilities that reported emissions in 2016 were estimated between 9.0 3.2 GgCH4 yr-1 (remote sensing) and 9.5 3.2 GgCH4 yr-1 (in situ), in both cases around 5 times higher than reported. The majority of methane emissions from UGS facilities in this study are likely dominated by anomalous activity: higher than expected compressor loss and leaking bypass isolation valves. Significant variability was observed at different time-scales: daily compressor duty-cycles and infrequent but large emissions from compressor station blow-downs. This observed variability made comparison of remote sensing and in situ observations challenging given measurements were derived largely at different times, however, improved agreement occurred when comparing simultaneous measurements. Temporal variability in emissions remains one of the most challenging aspects of UGS emissions quantification, underscoring the need for more systematic and persistent methane monitoring. © 2020 The Author(s). Published by IOP Publishing Ltd.
语种	英语
scopus关键词	Atmospheric chemistry; Compressors; Digital storage; Gas emissions; Greenhouse gases; Methane; Remote sensing; Surveys; Unattended sensors; Atmospheric methanes; Different time scale; Greenhouse gas inventory; In-situ observations; Maintenance activity; Simultaneous measurement; Temporal variability; Temporally resolved; Underground gas storage; emissions trading; environmental monitoring; greenhouse gas; methane; remote sensing; summer; underground storage; California; United States; Platanus racemosa
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154052
作者单位	Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr, Pasadena, CA 91109, United States; University of Arizona, Tucson, AZ 85721, United States; Scientific Aviation, 3335 Airport Rd Suite B, Boulder, CO 80301, United States; National Institute of Standards and Technology, Gaithersburg, MD, United States; Stanford University, 450 Serra Mall, Stanford, CA 94305, United States; University of California Riverside, 900 University Ave, Riverside, CA 92521, United States; Energy Technology Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90R3029-B, Berkeley, CA 94720, United States; California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125, United States
推荐引用方式 GB/T 7714	Thorpe A.K.,Duren R.M.,Conley S.,et al. Methane emissions from underground gas storage in California[J],2020,15(4).
APA	Thorpe A.K..,Duren R.M..,Conley S..,Prasad K.R..,Bue B.D..,...&Miller C.E..(2020).Methane emissions from underground gas storage in California.Environmental Research Letters,15(4).
MLA	Thorpe A.K.,et al."Methane emissions from underground gas storage in California".Environmental Research Letters 15.4(2020).