Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD030062 |
Spatio-temporally Resolved Methane Fluxes From the Los Angeles Megacity | |
Yadav, Vineet1; Duren, Riley1; Mueller, Kim2; Verhulst, Kristal R.1; Nehrkorn, Thomas3; Kim, Jooil4; Weiss, Ray F.4; Keeling, Ralph4; Sander, Stanley1; Fischer, Marc L.5; Newman, Sally6,7; Falk, Matthias8; Kuwayama, Toshihiro8; Hopkins, Francesca9; Rafiq, Talha9; Whetstone, James2; Miller, Charles1 | |
2019-05-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:9页码:5131-5148 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We combine sustained observations from a network of atmospheric monitoring stations with inverse modeling to uniquely obtain spatiotemporal (3-km, 4-day) estimates of methane emissions from the Los Angeles megacity and the broader South Coast Air Basin for 2015-2016. Our inversions use customized and validated high-fidelity meteorological output from Weather Research Forecasting and Stochastic Time-Inverted Lagrangian model for South Coast Air Basin and innovatively employ a model resolution matrix-based metric to disentangle the spatiotemporal information content of observations as manifested through estimated fluxes. We partially track and constrain fluxes from the Aliso Canyon natural gas leak and detect closure of the Puente Hills landfill, with no prior information. Our annually aggregated fluxes and their uncertainty excluding the Aliso Canyon leak period lie within the uncertainty bounds of the fluxes reported by the previous studies. Spatially, major sources of CH4 emissions in the basin were correlated with CH4-emitting infrastructure. Temporally, our findings show large seasonal variations in CH4 fluxes with significantly higher fluxes in winter in comparison to summer months, which is consistent with natural gas demand and anticorrelated with air temperature. Overall, this is the first study that utilizes inversions to detect both enhancement (Aliso Canyon leak) and reduction (Puente Hills) in CH4 fluxes due to the unintended events and policy decisions and thereby demonstrates the utility of inverse modeling for identifying variations in fluxes at fine spatiotemporal resolution. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469175600017 |
WOS关键词 | GEOSTATISTICAL APPROACH ; CARBON-DIOXIDE ; CO2 FLUXES ; EMISSIONS ; GAS ; TRANSPORT ; CALNEX ; BASIN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/183301 |
专题 | 气候变化 |
作者单位 | 1.CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA; 2.NIST, Gaithersburg, MD 20899 USA; 3.Atmospher & Environm Res, Lexington, MA USA; 4.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 5.Lawrence Berkeley Natl Lab, Berkeley, CA USA; 6.CALTECH, Pasadena, CA 91125 USA; 7.Bay Area Air Qual Management Dist, San Francisco, CA USA; 8.Calif Air Resources Board, Sacramento, CA USA; 9.Univ Calif Riverside, Riverside, CA 92521 USA |
推荐引用方式 GB/T 7714 | Yadav, Vineet,Duren, Riley,Mueller, Kim,et al. Spatio-temporally Resolved Methane Fluxes From the Los Angeles Megacity[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(9):5131-5148. |
APA | Yadav, Vineet.,Duren, Riley.,Mueller, Kim.,Verhulst, Kristal R..,Nehrkorn, Thomas.,...&Miller, Charles.(2019).Spatio-temporally Resolved Methane Fluxes From the Los Angeles Megacity.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(9),5131-5148. |
MLA | Yadav, Vineet,et al."Spatio-temporally Resolved Methane Fluxes From the Los Angeles Megacity".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.9(2019):5131-5148. |
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