Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-16885-2018 |
Detecting high-emitting methane sources in oil/gas fields using satellite observations | |
Cusworth, Daniel H.1,2; Jacob, Daniel J.1,2; Sheng, Jian-Xiong2; Benmergui, Joshua2; Turner, Alexander J.3; Brandman, Jeremy4; White, Laurent4; Randles, Cynthia A.4 | |
2018-11-29 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:23页码:16885-16896 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Methane emissions from oil/gas fields originate from a large number of relatively small and densely clustered point sources. A small fraction of high-mode emitters can make a large contribution to the total methane emission. Here we conduct observation system simulation experiments (OSSEs) to examine the potential of recently launched or planned satellites to detect and locate these high-mode emitters through measurements of atmospheric methane columns. We simulate atmospheric methane over a generic oil/gas field (20-500 production sites of different size categories in a 50 x 50 km(2) domain) for a 1-week period using the WRF-STILT meteorological model with 1.3 x 1.3 km(2) horizontal resolution. The simulations consider many random realizations for the occurrence and distribution of high-mode emitters in the field by sampling bimodal probability density functions (PDFs) of emissions from individual sites. The atmospheric methane fields for each realization are observed virtually with different satellite and surface observing configurations. Column methane enhancements observed from satellites are small relative to instrument precision, even for high-mode emitters, so an inverse analysis is necessary. We compare L-1 and L-2 regularizations and show that L-1 regularization effectively provides sparse solutions for a bimodally distributed variable and enables the retrieval of high-mode emitters. We find that the recently launched TROPOMI instrument (low Earth orbit, 7 x 7 km(2) nadir pixels, daily return time) and the planned GeoCARB instrument (geostationary orbit, 2.7 x 3.0 km(2) pixels, 2 times or 4 times per day return times) are successful (> 80% detection rate, < 20% false alarm rate) at locating high-emitting sources for fields of 20-50 emitters within the 50 x 50 km(2) domain as long as skies are clear. They are unsuccessful for denser fields. GeoCARB does not benefit significantly from more frequent observations (4 times per day vs. 2 times per day) because of a temporal error correlation in the inversion, unless under partly cloudy conditions where more frequent observation increases the probability of clear sky. It becomes marginally successful when allowing a 5 km error tolerance for localization. A next-generation geostationary satellite instrument with 1.3 x 1.3 km(2) pixels, hourly return time, and 1 ppb precision can successfully detect and locate the high-mode emitters for a dense field with up to 500 sites in the 50 x 50 km(2) domain. The capabilities of TROPOMI and GeoCARB can be usefully augmented with a surface air observation network of 5-20 sites, and in turn the satellite instruments increase the detection capability that can be achieved from the surface sites alone. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451580600004 |
WOS关键词 | HIGH-SPATIAL-RESOLUTION ; ATMOSPHERIC METHANE ; EMISSIONS ; CH4 ; GOSAT ; CO2 ; PERFORMANCE ; MISSION ; RETRIEVALS ; INVERSION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/18368 |
专题 | 地球科学 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 2.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 3.Univ Calif Berkeley, Coll Chem, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 4.ExxonMobil Res & Engn Co, Annandale, NJ USA |
推荐引用方式 GB/T 7714 | Cusworth, Daniel H.,Jacob, Daniel J.,Sheng, Jian-Xiong,et al. Detecting high-emitting methane sources in oil/gas fields using satellite observations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(23):16885-16896. |
APA | Cusworth, Daniel H..,Jacob, Daniel J..,Sheng, Jian-Xiong.,Benmergui, Joshua.,Turner, Alexander J..,...&Randles, Cynthia A..(2018).Detecting high-emitting methane sources in oil/gas fields using satellite observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(23),16885-16896. |
MLA | Cusworth, Daniel H.,et al."Detecting high-emitting methane sources in oil/gas fields using satellite observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.23(2018):16885-16896. |
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