摘要
利用2000—2009乌鲁木齐市不同功能区域大气降尘通量数据,建立因子分析模型,研究了乌鲁木齐市冬季大气降尘的来源与时空变化特征。结果表明,乌鲁木齐市冬季大气降尘的主要来源为燃煤烟尘、工业粉尘、交通道路尘。工业区、交通干线和居住区为全市冬季大气降尘量较大的区域。主城区冬季大气降尘通量呈下降趋势,主要与工业排放和采暖燃煤对大气降尘的贡献减少及相关大气污染控制取得实效有关。交通道路区域的降尘通量呈波动状态,变化较小。清洁点降尘通量前5年保持稳定,而后5年受到人为活动的影响,呈显著增加趋势。
The spatial and temporal variations and the source of atmospheric dust-fall in winter in Urumqi were analyzed using the dust-fall data at different functional areas during 2000-2009 by factor analysis. The results showed that atmospheric dust-fall in winter in Urumqi were from coal combustion smoke, industrial dust, road dust and vehicle emissions. The zones of high atmospheric dust-fall in winter were industrial zone, the main traffic line and residential zone respectively. The dust-fall amount at main city areas in winter was on decrease, by reason of anthropogenic emission control of industrial dust and coal combustion in heating period. But the dust-fall amount at main traffic line areas changed slightly at the same period. It was also found that the dust-fall amount at a clean air site varied little during the first half of the decade but had a significant increasing trend after 2005, which was mainly affected by human activities in recent years.
出处
《中国环境监测》
CAS
CSCD
北大核心
2014年第1期60-65,共6页
Environmental Monitoring in China
关键词
大气降尘
来源
时空变化
因子分析
乌鲁木齐市
atmospheric dust-fall
source
temporal and spatial variation
factor analysis
Urumqi
