DOI: 10.1002/2013JD020336
论文题名: Quantifying the contribution of inflow on surface ozone over California during summer 2008
作者: Pfister G.G. ; Walters S. ; Emmons L.K. ; Edwards D.P. ; Avise J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 21 起始页码: 12282
结束页码: 12299
语种: 英语
英文关键词: pollution inflow
; surface ozone
; WRF-Chem
Scopus关键词: Air quality
; Atmospheric chemistry
; Chemical analysis
; Estimation
; Meteorological instruments
; Pollution
; Troposphere
; Weather forecasting
; Weather satellites
; Aircraft observations
; Long range transport
; Quantitative estimates
; Relative contribution
; Spatial and temporal variability
; Surface ozone
; Weather research and forecasting
; WRF-Chem
; Ozone
; air quality
; aircraft
; atmospheric pollution
; inflow
; long range transport
; ozone
; quantitative analysis
; spatiotemporal analysis
; summer
; California
; United States
英文摘要: Transported pollution has been recognized as making a potentially strong impact on air quality in the western U.S., but large uncertainties remain in quantifying its contribution. Assessing the role of pollution transport in relation to local emissions and meteorology is especially important in light of possibly lower ozone standards and projected increases in transpacific pollution transport. We apply the Weather Research and Forecasting with Chemistry model to analyze the role of upwind pollution ("inflow") to surface ozone over California during the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites campaign in June-July 2008 over California. Comparisons of the model to surface and aircraft observations, ozonesondes, and satellite retrievals show an overall good agreement; a low bias (∼5 ppb) in free tropospheric ozone is attributed to low ozone at the boundaries and likely places our estimated inflow contribution on the lower side. Most other studies applied sensitivity analyses, while we use a synthetic ozone tracer, which provides a quantitative estimate of the budget. We estimate that on average 10 ± 9 ppb of surface afternoon ozone over California is attributed to ozone and ozone precursors entering the region from outside. This contribution features a significant spatial and temporal variability. While in most high ozone events, transported pollution plays a small role compared to local influences, for some instances, the impact can be substantial. Omitting data impacted by wildfires, we estimate the 90th percentile of the relative contribution of O3 INFLOW to 8 h ozone >75 ppb as 10%. Our results also indicate that inflow might have a stronger impact on surface ozone in less polluted compared to polluted areas. Key Points Long-range transport can have significant contribution to high surface O3 in CA O3 inflow into CA might have stronger impact on unpolluted than polluted areas 1 in 10 times inflow contributes to 8 h O3 >75 ppb with >10% in CA ©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/63169
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: Atmospheric Chemistry Division, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States; California Air Resources Board, Sacramento, CA, United States
Recommended Citation:
Pfister G.G.,Walters S.,Emmons L.K.,et al. Quantifying the contribution of inflow on surface ozone over California during summer 2008[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(21)