气压对西安市城区空气质量的影响  

INFLUENCES OF ATMOSPHERIC PRESSURE ON AIR POLLUTION IN XI'AN CITY

作　　者：李琛[1,2,3,4] 刘瑾[1,2,3,4] 王彦民[1,2,3,4] 

机构地区：[1]陕西理工大学化学与环境科学学院,陕西汉中723001 [2]陕西省秦巴地区生态与环境保护协同创新中心,陕西汉中723001 [3]陕西理工大学秦巴地区生态环境保护研究所,陕西汉中723001 [4]陕西省催化基础与应用重点实验室,陕西汉中723001

出　　处：《环境工程》2017年第3期101-105,122,共6页Environmental Engineering

基　　金：国家自然科学基金面上项目(21373132);汉中市科技发展专项计划项目(2013hzzx-51);陕西理工学院科研计划项目(SLGKY15-26);陕西理工学院教学改革研究项目(XJG1503)

摘　　要：以西安市城区2014年1月1日至2015年12月31日空气质量监测数据和气象资料为基础,分析了气压对空气质量的影响及其空气污染特征。结果表明:AQI及各污染物浓度变化很好的拟合二次函数,且拐点横坐标均在7月前后。相关性分析表明:平均海平面大气压与SO_2、CO、NO_2、O_3呈现为显著正相关性,与AQI、PM_(2.5)、PM_(10)呈现为显著负相关。平均海平面大气压P对各污染物的影响在夏季最为强烈,而在春季和冬季最弱;P对O_3的形成存在较明显的影响。各污染物浓度和气象因素之间存在明显的共线性,PM_(10)主成分回归模型通过了显著性检验、拟合优度很好且无多重共线性。The influence of atmospheric pressure on air quality and air pollution characteristics of Xi’an were studied based on the environmental monitoring and meteorological data during January 1st,2014 to December 31 st,2015. Results showed that the relationships between AQI and air pollutants could be well fitted by quadratic functions and the horizontal coordinates of the inflection points usually submitted in July. A significant positive correlation was showed between P（ the atmospheric pressure at mean sea level in Xi’an） and SO2,CO,NO2,O3,and a significant negative correlation was showed between P and AQI,PM2. 5,PM10. P had the strongest influence on the air pollutants in summer,especially on the formation of O3,while was the weakest in spring and winter. The principal component regression model of PM10 passed the significant test. The goodness of fit was very good and there was no multi-collinearity.

关 键 词：西安市 空气污染特征 影响因素 平均海平面大气压 

分 类 号：X51[环境科学与工程—环境工程]