重庆市多年大气混合层厚度变化特征及其对空气质量的影响分析  

Multi-yearly changes of atmospheric mixed layer thickness and its effect on air quality above Chongqing

作　　者：叶堤[1] 王飞[1] 陈德蓉[1] 

机构地区：[1]重庆市环境科学研究院,重庆401147

出　　处：《气象与环境学报》2008年第4期41-44,共4页Journal of Meteorology and Environment

摘　　要：根据2000—2005年逐日4个时次的常规气象资料,采用国家标准GB/T 3840—91中规定的方法计算并分析了重庆主城区大气混合层厚度的频率分布、时间变化等基本特征;在此基础上,进一步以2005年为例分析了混合层厚度与空气污染指数的相关关系。结果表明:重庆市大气混合层厚度以0—800 m范围出现频率最高,多年平均值为428 m;混合层厚度的季节变化和日变化特征明显。与1980—1990年相比,2000—2005年期间年平均混合层厚度总体上有所增加。混合层厚度与空气污染指数的相关性分析显示,月平均混合层厚度和月平均API呈显著负相关(r=-0.72);分析表明,大气混合层厚度是影响城市空气质量的重要因素。Based on the daily meteorological observation data from 2000 to 2005, frequency distribution and time variation of atmospheric mixed layer thickness were analyzed by the methods established in the national standard GB/T 3840---91. Furthermore, the correlation between mixed layer thickness and air pollution index （API） was also discussed as a case study of 2005. The results show that the mixed layer thickness from 0 to 800 m is the most frequent,and the average value is 428 m. The seasonal and daily variations are obvious. Compared to that in 1980--1990, the annual average mixed layer thickness in 2000--2005 increases in general. Correlation analysis indicates that the mixed layer thickness is negatively correlated with API （ r = - 0.72）, which suggests that the mixed layer thickness is an important factor influencing air quality in Chongqing.

关 键 词：大气混合层厚度 湍流 空气污染指数 变化特征 空气质量 相关分析 

分 类 号：P241[天文地球—测绘科学与技术]