西宁市逆温特征及其与空气污染物浓度的相关分析

doi:10.7522/j.issn.1000-0240.2014.0072

摘要/Abstract

摘要： 根据2010-2012年西宁市基本探空气象站逐日07：00时和19：00时两个时次的逆温资料，及西宁市环境监测站监测的大气污染物（SO₂、NO₂、PM₁₀）日均值数据，分析了西宁市逆温基本特征及其与空气污染物浓度之间的相关关系. 结果表明：西宁市2010-2012年07：00时逆温出现频率为69%，19：00时逆温出现频率为41%；近地逆温层厚度冬季最厚，夏季最薄. 07：00时和19：00时月平均逆温厚度变化趋势基本一致；西宁市逆温发生频率冬半年明显高于夏半年；秋、冬季产生的逆温强度明显比春、夏季强. 3 a来西宁市空气污染共出现148 d，逆温频率和空气污染物月平均浓度有较好的正相关性. 08：00时西宁市逐日空气污染物浓度与逆温厚度呈正相关，与逆温强度呈负相关关系. 冬、春季平均空气污染物浓度值与逆温厚度、强度均呈正相关关系.

关键词: 西宁市区, 逆温, 空气污染物, 相关性

Abstract: Based on the daily temperature inversion data at 07:00 and 19:00 at the basic sounding stations and the daily average atmospheric pollutants data (SO₂, NO₂ and PM₁₀) of environmental monitoring station in Xining City during 2010-2012, the basic characteristics of temperature inversion in Xining and their correlations with the concentrations of air pollutants were analyzed. It is found that temperature inversion frequency was 69% at 07:00 and 41% at 19:00. The near the ground inversion layer was thickest in winter, and thinnest in summer. The changing trend of monthly average temperature inversion thickness was basically identical at 7:00 and at 19:00. Temperature inversion frequency in the winter half year was significantly higher than that in the summer half year; the inversion intensity in autumn and winter was significantly better than that in spring and summer. There were 148 d of air pollution in the three years. Between the temperature inversion frequency and monthly average concentration of air pollutants there was good positive correlation. Daily air pollutant concentrations had a positive correlation with the thickness of the temperature inversion at 8 am, and a negative correlation with the intensity of inversion. There were positive correlations between average air pollutant concentration and temperature inversion thickness, intensity in winter and spring.

Key words: Xining City, temperature inversion, air pollutants, correlation

中图分类号:

X51/P423.1

何永晴, 赵玉成, 冯蜀青. 西宁市逆温特征及其与空气污染物浓度的相关分析[J]. 冰川冻土, 2014, 36(3): 608-613.

HE Yongqing, ZHAO Yucheng, FENG Shuqing. Temperature inversion in Xining City: Characteristics and correlation with air pollutant concentrations[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2014, 36(3): 608-613.

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