DOI: 10.1002/jgrd.50135
论文题名: Surface observations for monitoring urban fossil fuel CO<inf>2</inf> emissions: Minimum site location requirements for the Los Angeles megacity
作者: Kort E.A. ; Angevine W.M. ; Duren R. ; Miller C.E.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1
结束页码: 8
语种: 英语
英文关键词: carbon dioxide
; CO2
; emissions
; megacity
; MRV
Scopus关键词: Estimation
; Inverse problems
; Particulate emissions
; Urban growth
; Weather forecasting
; Anthropogenic emissions
; Bayesian inverse method
; CO2
; Global carbon cycle
; Localized dynamics
; Megacities
; MRV
; Surface observation
; Carbon dioxide
; carbon cycle
; carbon dioxide
; carbon emission
; estimation method
; flow modeling
; fossil fuel
; megacity
; regional pattern
; timescale
; California
; Los Angeles Basin
; United States
英文摘要: The contemporary global carbon cycle is dominated by perturbations from anthropogenic CO2 emissions. One approach to identify, quantify, and monitor anthropogenic emissions is to focus on intensely emitting urban areas. In this study, we compare the ability of different CO2 observing systems to constrain anthropogenic flux estimates in the Los Angeles megacity. We consider different observing system configurations based on existing observations and realistic near-term extensions of the current ad hoc network. We use a high-resolution regional model (Stochastic Time-Inverted Lagrangian Transport-Weather Research and Forecasting) to simulate different observations and observational network designs within and downwind of the Los Angeles (LA) basin. A Bayesian inverse method is employed to quantify the relative ability of each network to improve constraints on flux estimates. Ground-based column CO2 observations provide useful complementary information to surface observations due to lower sensitivity to localized dynamics, but column CO 2 observations from a single site do not appear to provide sensitivity to emissions from the entire LA megacity. Surface observations from remote, downwind sites contain weak, sporadic urban signals and are complicated by other source/sink impacts, limiting their usefulness for quantifying urban fluxes in LA. We find a network of eight optimally located in-city surface observation sites provides the minimum sampling required for accurate monitoring of CO2 emissions in LA, and present a recommended baseline network design. We estimate that this network can distinguish fluxes on 8 week time scales and 10 km spatial scales to within ∼12 g C m-2 d -1 (∼10% of average peak fossil CO2 flux in the LA domain). Key PointsUrban CO2 observations are simulated and evaluated for monitoring emissionsA recommended minimal observing network for the LA megacity is presented ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63952
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: W. M. Keck Institute for Space Studies, California Institute of Technology, Pasadena, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; CIRES, University of Colorado at Boulder, Boulder, CO, United States; NOAA Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Kort E.A.,Angevine W.M.,Duren R.,et al. Surface observations for monitoring urban fossil fuel CO<inf>2</inf> emissions: Minimum site location requirements for the Los Angeles megacity[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)