Arid
DOI10.1016/1352-2310(95)00015-Q
AIR POLLUTANT TRANSPORT IN A COASTAL ENVIRONMENT .2. 3-DIMENSIONAL SIMULATIONS OVER LOS-ANGELES BASIN
LU, R; TURCO, RP
通讯作者LU, R
来源期刊ATMOSPHERIC ENVIRONMENT
ISSN1352-2310
出版年1995
卷号29期号:13页码:1499-1518
英文摘要

The air quality problems in the Los Angeles basin are related to the local climate. A strong temperature inversion and stagnant synoptic conditions associated with the Pacific high-pressure system favor the generation of severe air pollution episodes. Sea-breezes and mountain-induced Bows play an important role in controlling pollutant transport over the basin. The distributions of pollutants over the basin display complicated three-dimensional patterns, including distinct elevated layers. A three-dimensional meteorological model is used to simulate air Bow patterns and pollutant transport in the Los Angeles basin under such conditions. The complex simulated Bows are analyzed to explain the origin of the observed pollution layers. Pollutants found in the afternoon mixed layer may be dispersed to three different regions: the high desert to the east and north of the Los Angeles basin; the free troposphere above the temperature inversion; and within the temperature inversion layer itself. Several mechanisms transfer pollution into the inversion layer. Convergence zones in the San Fernando Valley and near Lake Elsinore lift polluted air into the inversion. A coupled sea-breeze/mountain-flow circulation along the southwest Bank of the Santa Ana Mts creates pollution layers that extend westward over the coastal plain and offshore. The afternoon pollution layers frequently observed in the western Los Angeles basin are caused by the sea-breeze circulation or the coupled sea-breeze/mountain-flow circulation over the south slope of the San Gabriel Mts. As the boundary layer stabilizes during the early evening, layers of polluted air are left suspended over the eastern basin. Pollutants trapped in the inversion layer act as a reservoir of poor-quality air for the basin, and may contribute to extreme pollutant concentrations seen after several days of stagnant air.


英文关键词AIR POLLUTION LOS ANGELES PHOTOCHEMICAL SMOG ELEVATED POLLUTION LAYERS SEA-BREEZE COMPLEX TERRAIN MESOSCALE METEOROLOGY METEOROLOGICAL MODEL
类型Article
语种英语
收录类别SCI-E
WOS记录号WOS:A1995RH24800003
WOS关键词LAYER ; LIDAR ; CIRCULATIONS ; CALIFORNIA
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构University of California, Los Angeles
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/130991
推荐引用方式
GB/T 7714
LU, R,TURCO, RP. AIR POLLUTANT TRANSPORT IN A COASTAL ENVIRONMENT .2. 3-DIMENSIONAL SIMULATIONS OVER LOS-ANGELES BASIN[J]. University of California, Los Angeles,1995,29(13):1499-1518.
APA LU, R,&TURCO, RP.(1995).AIR POLLUTANT TRANSPORT IN A COASTAL ENVIRONMENT .2. 3-DIMENSIONAL SIMULATIONS OVER LOS-ANGELES BASIN.ATMOSPHERIC ENVIRONMENT,29(13),1499-1518.
MLA LU, R,et al."AIR POLLUTANT TRANSPORT IN A COASTAL ENVIRONMENT .2. 3-DIMENSIONAL SIMULATIONS OVER LOS-ANGELES BASIN".ATMOSPHERIC ENVIRONMENT 29.13(1995):1499-1518.
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