| DOI: | 10.1016/j.atmosenv.2014.09.057
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| Scopus记录号: | 2-s2.0-84939794886
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| 论文题名: | Transport aloft drives peak ozone in the Mojave Desert |
| 作者: | VanCuren R
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2015
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| 卷: | 109 | | 起始页码: | 331
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| 结束页码: | 341
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| 语种: | 英语
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| 英文关键词: | California
; Las Vegas
; MDAB
; Mojave Desert
; Non-attainment
; Ozone transport
; SJVAB
; SOCAB
|
| Scopus关键词: | Air pollution
; Landforms
; Mixing
; Ozone
; Ozone layer
; River pollution
; Urban growth
; California
; Las Vegas
; MDAB
; Mojave Desert
; Non-attainment
; Ozone transport
; SJVAB
; SOCAB
; Urban transportation
; ozone
; volatile organic compound
; airborne survey
; anthropogenic source
; atmospheric pollution
; halocarbon
; intensive agriculture
; megacity
; ozone
; pollutant transport
; time dependent behavior
; troposphere
; air pollution
; air quality
; altitude
; Article
; Asia
; desert
; fumigation
; ozone layer
; pollution transport
; priority journal
; spring
; summer
; troposphere
; United States
; urban area
; California
; Colorado Plateau
; Colorado River [North America]
; Los Angeles [California]
; Mojave Desert
; North Carolina
; Rocky Mount
; San Joaquin Valley
; 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: | Transport of anthropogenic pollution eastward out of the Los Angeles megacity region in California has been periodically observed to reach the Colorado River and the Colorado Plateau region beyond. In the 1980s, anthropogenic halocarbon tracers measured in and near the Las Angeles urban area and at a mountain-top site near the Colorado River, 400 km downwind, were shown to have a correlated seven-day cycle explainable by transport from the urban area with a time lag of 1-2 days. Recent short term springtime intensive studies using aircraft observations and regional modeling of long range transport of ozone from the Southern California megacity region showed frequent and persistent ozone impacts at surface sites across the Colorado Plateau and Southern Rocky Mountain region, at distances up to 1500 km, also with time lags of 1-2 days. However, the timing of ozone peaks at low altitude monitoring sites within the Mojave Desert, at distances from 100 to 400 km from the South Coast and San Joaquin Valley ozone source regions, does not show the expected time-lag behavior seen in the larger transport studies. This discrepancy is explained by recognizing ozone transport across the Mojave Desert to occur in a persistent layer of polluted air in the lower free troposphere with a base level at approximately 1 km MSL. This layer impacts elevated downwind sites directly, but only influences low altitude surface ozone maxima through deep afternoon mixing. Pollutants in this elevated layer derive from California source regions (the Los Angeles megacity region and the intensive agricultural region of the San Joaquin Valley), from long-range transport from Asia, and stratospheric down-mixing. Recognition of the role of afternoon mixing during spring and summer over the Mojave explains and expands the significance of previously published reports of ozone and other pollutants observed in and over the Mojave Desert, and resolves an apparent paradox in the timing of ozone peaks due to short-range and long-range transport from the upwind basins. © 2014 Elsevier Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/81806
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Air Quality Research Center, University of California, Davis, United States
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| Recommended Citation: | |
VanCuren R. Transport aloft drives peak ozone in the Mojave Desert[J]. Atmospheric Environment,2015-01-01,109
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