DOI: 10.1002/2017JD027364
Scopus记录号: 2-s2.0-85042625855
论文题名: Siting Background Towers to Characterize Incoming Air for Urban Greenhouse Gas Estimation: A Case Study in the Washington, DC/Baltimore Area
作者: Mueller K. ; Yadav V. ; Lopez-Coto I. ; Karion A. ; Gourdji S. ; Martin C. ; Whetstone J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 5 起始页码: 2910
结束页码: 2926
语种: 英语
英文关键词: background
; carbon dioxide
; emissions
; greenhouse gas
; inversion
; urban
英文摘要: There is increased interest in understanding urban greenhouse gas (GHG) emissions. To accurately estimate city emissions, the influence of extraurban fluxes must first be removed from urban greenhouse gas (GHG) observations. This is especially true for regions, such as the U.S. Northeastern Corridor-Baltimore/Washington, DC (NEC-B/W), downwind of large fluxes. To help site background towers for the NEC-B/W, we use a coupled Bayesian Information Criteria and geostatistical regression approach to help site four background locations that best explain CO2 variability due to extraurban fluxes modeled at 12 urban towers. The synthetic experiment uses an atmospheric transport and dispersion model coupled with two different flux inventories to create modeled observations and evaluate 15 candidate towers located along the urban domain for February and July 2013. The analysis shows that the average ratios of extraurban inflow to total modeled enhancements at urban towers are 21% to 36% in February and 31% to 43% in July. In July, the incoming air dominates the total variability of synthetic enhancements at the urban towers (R2 = 0.58). Modeled observations from the selected background towers generally capture the variability in the synthetic CO2 enhancements at urban towers (R2 = 0.75, root-mean-square error (RMSE) = 3.64 ppm; R2 = 0.43, RMSE = 4.96 ppm for February and July). However, errors associated with representing background air can be up to 10 ppm for any given observation even with an optimal background tower configuration. More sophisticated methods may be necessary to represent background air to accurately estimate urban GHG emissions. ©2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114264
Appears in Collections: 气候减缓与适应
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作者单位: Special Programs Office, National Institute of Standards and Technology, Gaithersburg, MD, United States; Department of Climate and Space Science, University of Michigan, Ann Arbor, MI, United States; Jet Propulsion Laboratory, Stanford, CA, United States; Fire Research Division, National Institute of Standards and Technology, Gaithersburg, MD, United States; Department of Atmospheric and Oceanic Science, University of Maryland, Silver Springs, MD, United States
Recommended Citation:
Mueller K.,Yadav V.,Lopez-Coto I.,et al. Siting Background Towers to Characterize Incoming Air for Urban Greenhouse Gas Estimation: A Case Study in the Washington, DC/Baltimore Area[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(5)