DOI: 10.1016/j.atmosenv.2015.01.065
Scopus记录号: 2-s2.0-84922513901
论文题名: Top-down methane emissions estimates for the San Francisco Bay Area from 1990 to 2012
作者: Fairley D ; , Fischer M ; L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 107 起始页码: 9
结束页码: 15
语种: 英语
英文关键词: Emissions inventory
; Greenhouse gas
; Inventory verification
; Methane emissions
; Top-down estimates
Scopus关键词: Air quality
; Carbon monoxide
; Gas emissions
; Methane
; Quality management
; Uncertainty analysis
; Urban growth
; Air quality management districts
; Atmospheric measurement
; Emission inventories
; Emissions inventory
; Greenhouse gas (GHG)
; Inventory verifications
; Methane emissions
; Topdown
; Greenhouse gases
; carbon monoxide
; methane
; air quality
; carbon monoxide
; emission inventory
; estimation method
; methane
; pollutant source
; air pollution
; air quality
; Article
; bay
; mathematical parameters
; methane emission
; priority journal
; top down estimate
; California
; San Francisco Bay
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Methane is a potent greenhouse gas (GHG) that is now included in both California State and San Francisco Bay Area (SFBA) bottom-up emission inventories as part of California's effort to reduce anthropogenic GHG emissions. Here we provide a top-down estimate of methane (CH4) emissions from the SFBA by combining atmospheric measurements with the comparatively better estimated emission inventory for carbon monoxide (CO). Local enhancements of CH4 and CO are estimated using measurements from 14 air quality sites in the SFBA combined together with global background measurements. Mean annual CH4 emissions are estimated from the product of Bay Area Air Quality Management District (BAAQMD) emission inventory CO and the slope of ambient local CH4 to CO. The resulting top-down estimates of CH4 emissions are found to decrease slightly from 1990 to 2012, with a mean value of 240±60 GgCH4yr-1 (at 95% confidence) in the most recent (2009-2012) period, and correspond to reasonably a constant factor of 1.5-2.0 (at 95% confidence) times larger than the BAAQMD CH4 emission inventory. However, we note that uncertainty in these emission estimates is dominated by the variation in CH4:CO enhancement ratios across the observing sites and we expect the estimates could represent a lower-limit on CH4 emissions because BAAQMD monitoring sites focus on urban air quality and may be biased toward CO rather than CH4 sources. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81932
Appears in Collections: 气候变化事实与影响
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作者单位: Planning, Rules and Research Division, Bay Area Air Quality Management District, 939 Ellis St., San Francisco, CA, United States; Energy and Environmental Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Recommended Citation:
Fairley D,, Fischer M,L. Top-down methane emissions estimates for the San Francisco Bay Area from 1990 to 2012[J]. Atmospheric Environment,2015-01-01,107