成都地区地气温差演变规律对空气质量的影响研究  

A Study on the Evolution Law of Ground Temperature Difference in Chengdu and Its Influence on Air Quality

作　　者：龙艺文 王超 陈亚玲 冉欢欢 杨巨佳 肖天贵 

机构地区：[1]成都信息工程大学大气科学学院,高原大气与环境四川省重点实验室,四川 成都

出　　处：《气候变化研究快报》2020年第5期446-453,共8页Climate Change Research Letters

摘　　要：地气温差的变化会直接影响地表感热通量的变化,从而影响边界层结构特征,而不同的边界层结构对空气污染物的稀释、扩散有不同的影响。本文利用成都市温江站2014年的地表观测资料和空气质量观测资料,分析了地气温差和空气质量的年、季节、日变化和季节日变化特征,讨论地气温差对空气质量的影响。结果表明:(1) 成都地区地气温差的年平均值为2.2℃,一年中地气温差的最大值出现在5月,最小值出现在11月;秋季的地气温差最小,冬季次之,春季的温差最大;地气温差的日变化显著,地气温差的变化幅度春季最大,秋季最小。(2) 总的来讲,地气温差越小越容易出现颗粒物浓度的大值;地气温差越大,越有利于污染物的稀释、扩散,空气质量越好。利用地气温差对污染物浓度的影响特征,可作为污染潜势预报的参考依据。The change of the temperature difference between the earth and the atmosphere will directly affect the change of the sensible heat flux of the earth’s surface, thus affecting the structure of the boundary layer, and different boundary layer structures have different effects on the dilution and diffusion of air pollutants. Based on the meteorological and air quality observation data of Wenjiang station in Chengdu in 2014, this paper analyzes the annual, seasonal, daily and seasonal daily variation characteristics of the ground air temperature difference and air quality, and discusses the influence of the ground air temperature difference on the air quality. The results show that: (1) the annual average value of the ground air temperature difference in Chengdu is 2.2˚C. The maximum value of the ground air temperature difference in a year appears in May and the minimum value in November;the autumn ground air temperature difference is the smallest, followed by winter. The daily variation of the temperature difference between the earth and the atmosphere is obvious, and the variation range of the temperature difference between the earth and the atmosphere is the largest in spring and the smallest in autumn. (2) The smaller the ground air temperature difference is, the higher the particle concentration is;the larger the ground air temperature difference is, the more conducive to the dilution and diffusion of pollutants, and the better the air quality. The characteristics of the temperature difference between ground and air can be used as a reference for the prediction of pollution potential.

关 键 词：成都 地气温差 空气质量 污染潜势预报 

分 类 号：X51[环境科学与工程—环境工程]