气候变化领域集成服务门户(CCPortal): Evaluating the Mobile Flux Plane (MFP) Method to Estimate Methane Emissions Using Large Eddy Simulations (LES)

CCPortal

DOI	10.1029/2020JD032663
	Evaluating the Mobile Flux Plane (MFP) Method to Estimate Methane Emissions Using Large Eddy Simulations (LES)
	Kumar R.; Mitchell D.A.; Steinhoff D.F.; Saide P.; Kosovic B.; Downey N.; Blewitt D.; Monache L.D.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	This study evaluates the efficacy of the mobile flux plane (MFP) method to derive methane emissions from oil and gas production fields using a first-of-its-kind high-resolution methane concentration data set. Transport and dispersion of methane emissions from seven hypothetical well pads generated with an oil field emission simulator is simulated every second at 10 m resolution using the Weather Research and Forecasting (WRF) model in large eddy simulation mode. The time varying WRF-generated methane concentration data set is sampled by a simulated MFP system downwind of the seven well pads at five sampling distances of 50, 75, 100, 125, and 150 m. Several key findings highlight the significant variability in MFP emission rate estimates induced by atmospheric turbulence and variable source emission rates. Natural atmospheric turbulence alone was found to generate significant variability (33%–75%) in the MFP emission estimates with constant emission rates at the source location. It was also found that turbulent wind speed fluctuations over the duration of a transect can also affect MFP estimates up to about ±50% through convergence (divergence) that increases (decreases) methane concentrations, and by its effect on the assumption of steady winds over the duration of the transect. It was further found that the MFP method typically estimated about 19%–33% and 51%–75% of known site emission rates using the trapezoidal and Gaussian fit integration methods, respectively. Thus, methane concentrations would need to be measured to a much higher elevation to generate robust and accurate methane emission rate estimates. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	LES; methane; mobile flux plane method; oil and gas production activities; point sources; turbulence
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185415
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Upstream Research Company, Exxon Mobil, Houston, TX, United States; Center for Western Weather and Water Extremes, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Earth System Sciences, LLC, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Kumar R.,Mitchell D.A.,Steinhoff D.F.,et al. Evaluating the Mobile Flux Plane (MFP) Method to Estimate Methane Emissions Using Large Eddy Simulations (LES)[J],2021,126(5).
APA	Kumar R..,Mitchell D.A..,Steinhoff D.F..,Saide P..,Kosovic B..,...&Monache L.D..(2021).Evaluating the Mobile Flux Plane (MFP) Method to Estimate Methane Emissions Using Large Eddy Simulations (LES).Journal of Geophysical Research: Atmospheres,126(5).
MLA	Kumar R.,et al."Evaluating the Mobile Flux Plane (MFP) Method to Estimate Methane Emissions Using Large Eddy Simulations (LES)".Journal of Geophysical Research: Atmospheres 126.5(2021).