【摘要】 据华北西部区域四个主要城市2003-2012年API日报数据和相应时段的地面气象要素数据,分析API时空分布特征以及API与气象要素的关系来探索区域大气环境污染形成与控制因素。结果显示:1四座城市空气污染状况在2003-2012年呈逐步改善,空气质量季节变化明显,冬季空气污染最严重,夏季最轻。2四城市气象因子可降维为高温天气、大风天气、降水天气三个因子。3四座城市API与降维后的气象因素存在相关性:API与高温天气呈现显著负相关,与大风天气呈现不同相关性,与降水天气无相关关系。更多还原

【Abstract】 The daily air pollution index( API) and corresponding ground meteorological elements data in 2003-2012 of the four major cities in the western region of Northern China was collected for the research. The temporal-spatial distribution of API and relationship between API and meteorological elements was analyzed to explore the formation and control factors of the regional air pollution. The conclusions were as follows: 1the air pollution conditions in four cities had been improved gradually in 2003-2012. The air pollution status varied seasonally,which was the most serious in winter,and slightest in summer. 2the meteorological elements data could dimensionality reduce to three factors: high temperatures,strong wind and precipitation. 3API and dimensionality reduced meteorological elements in four cities existed relationship: API was significant negatively correlated with high temperatures,which had different correlated with strong wind and was no significant correlated with precipitation.更多还原