DOI: 10.1016/j.atmosenv.2014.05.076
Scopus记录号: 2-s2.0-84949100035
论文题名: Causes of increasing ozone and decreasing carbon monoxide in springtime at the Mt. Bachelor Observatory from 2004 to 2013
作者: Gratz L ; E ; , Jaffe D ; A ; , Hee J ; R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 109 起始页码: 323
结束页码: 330
语种: 英语
英文关键词: Asian long-range transport
; Carbon monoxide
; Long-term trends
; Ozone
; Trajectory cluster analysis
; Western U.S.
Scopus关键词: Carbon monoxide
; Cluster analysis
; Observatories
; Anthropogenic emissions
; Asian long-range transport
; Efficient combustions
; Long range transport
; Long-term trend
; Long-term variability
; Northern Hemispheres
; Western U.S
; Ozone
; carbon monoxide
; ozone
; altitude
; Article
; Asia
; atmospheric transport
; back trajectory
; boundary layer
; cluster analysis
; Europe
; latitude
; mid latitude
; North America
; Northern Hemisphere
; priority journal
; spring
; troposphere
; water vapor
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: We report trends in springtime ozone (O3) and carbon monoxide (CO) at the Mt. Bachelor Observatory (MBO) in central Oregon, U.S.A. from 2004 to 2013. Over the 10-year period the median and 95th percentile springtime O3 increased by 0.76 ± 0.61 ppbv yr-1 (1.7 ± 1.4% yr-1) and 0.87 ± 0.73 ppbv yr-1 (1.5 ± 1.2% yr-1), respectively. These trends are consistent with reported positive trends in springtime O3 in the western U.S. In contrast, median CO decreased by -3.1 ± 2.4 ppbv yr-1 (-1.9 ± 1.4% yr-1), which is highly similar to springtime North Pacific surface flask measurements from 2004 to 2012. While a 10-year record is relatively short to evaluate long-term variability, we incorporate transport model analysis and contextualize our measurements with reported northern mid-latitude trends over similar time frames to investigate the causes of increasing O3 and decreasing CO at MBO. We performed cluster analysis of 10-day HYSPLIT back-trajectories from MBO and examined O3 and CO trends within each cluster. Significant positive O3 trends were associated with high-altitude, rapid transport from East Asia. Significant negative CO trends were most associated with transport from the North Pacific and Siberia, as well as from East Asia. The rise in springtime O3 is likely associated with increasing O3 precursor emissions in Asia and long-range transport to the western U.S. The decline in springtime CO appears linked to decreasing Northern Hemisphere background CO, largely due to anthropogenic emissions reductions in Europe and North America, and also to a recently reported decline in total CO output from China caused by more efficient combustion. These springtime O3 and CO trends suggest that hydroxyl radical (OH) mixing ratios in the North Pacific may have increased over the study period. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81803
Appears in Collections: 气候变化事实与影响
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作者单位: School of Science and Technology, University of Washington-Bothell, 18115 Campus Way NE, Bothell, WA, United States; Department of Atmospheric Sciences, University of Washington, 408 Atmospheric Sciences-Geophysics Building, Seattle, WA, United States
Recommended Citation:
Gratz L,E,, Jaffe D,et al. Causes of increasing ozone and decreasing carbon monoxide in springtime at the Mt. Bachelor Observatory from 2004 to 2013[J]. Atmospheric Environment,2015-01-01,109