污染物,湿清除,大气污染," /> 污染物,湿清除,大气污染,"/> Pollutant,Wet scavenging,Air pollution,"/> 西安市环境空气质量变化特征及其与气象条件的关系
主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2013, Vol. 29 ›› Issue (6): 150-153.doi:

• 快报 • 上一篇    

西安市环境空气质量变化特征及其与气象条件的关系

胡琳1 曹红利2 张文静1 王琦1 穆军3   

  1. 1.陕西省气候中心，陕西 西安 710014；2.西安市气象局，陕西西安 710015; 3.西安市环境保护科学研究院，陕西西安 710061

  • 出版日期:2013-12-31 发布日期:2013-12-31

Ambient air quality change and its relationship with meteorological conditions in Xi’an

HU Lin1 CAO Hong-li2 ZHANG Wen-jing1 WANG Qi1 MU Jun3   

  1. 1. Shaanxi Provincial Climate Center, Xi’an 710014, China; 2. Xi’an Meteorological Service, Xi’an 710015, China; 3.Xi’an Academy of Environmental Protection, Xi’an 710061, China
  • Online:2013-12-31 Published:2013-12-31

PDF (PC)

637

被引次数

56

摘要： 采用2002—2011年大气污染物的现状监测资料以及同期气象观测资料，分析西安市空气污染的时空分布特征及其与气象条件的关系，并探讨了空气质量为优及轻微污染以上的天气事件对应的高空典型环流形势，研究污染成因及污染物传输规律。结果表明：西安市污染较为严重的污染物为PM10，较大浓度值出现在冬季采暖期,雨水能够对污染物起到有效的湿清除作用，且空气质量状况具有明显的延续性，天气系统具有延续性是造成空气质量的延续性的可能原因；逆温的存在、最大混合层高度的降低造成大气层结稳定，风速较小，阻碍空气的对流运动，使污染物在垂直方向上的扩散能力很弱，不利于污染物扩散，易造成环境空气质量下降引起空气污染的发生。

关键词: font-family: 宋体, mso-bidi-font-family: 'Times New Roman', mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, 污染物')">mso-bidi-language: AR-SA">污染物, 湿清除, 大气污染

Abstract: Based on the data of atmospheric pollutants and the corresponding meteorological observation data from 2002 to 2011 in Xi’an, the temporal and spatial distributions of air pollution and its relationship with meteorological conditions were analyzed. The typical upper-level circulation situation in the day when air quality is superior grade or above light pollution grade, forming reasons and transport path of pollutants were discussed. The results indicate that the primary pollutant is PM10 in Xi’an, and its maximum concentration appears in winter during heating period. Rainfall is the significant wet scavenging effect for pollutants, and air quality status has obvious continuity owing to the continuity of weather system. Presence of inversion temperature and decrease of the maximum mixed layer height make atmospheric stratification stable and wind speed small, hinder the convective movement of air, which lead to the weak diffusion of pollutants along the vertical direction. Thus, it is not favorable to the diffusion of pollutants, and it easily makes the ambient air quality descended.

Key words: font-family: "Times New Roman", mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, Pollutant')">mso-fareast-font-family: 宋体">Pollutant, Wet scavenging, Air pollution