Analysis on the Variation of Urban Heat Island Intensity and Its Relationships with Air Pollutants in Kunming, China

• 作者: Hengyu Wang Yunling He
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 城市热岛强度 空气污染物 昆明 城市空气质量 正相关关系 中国 二氧化氮 月平均
• 年，卷（期）: 2013,（1）
• 页码范围: 26-28
• 页数: 3页
• 分类号: X16

摘要

[Objective]The research aimed to study variation of the urban heat island(UHI) intensity and its relationships with air pollutants in Kunming.[Method]Observation data of the air temperature series from Kunming station and surrounding Taihuashan meteorological station were used to investigate the variation characteristics of UHI intensity in Kunming during 2001-2010.Meanwhile,relationship between UHI intensity and air quality on the basis of concentration data for primary air pollutants(SO2,NO2 and PM10) from environmental monitoring station of Kunming was studied in this paper.[Result]Annual mean UHI intensity increased at the rate of 0.110 ℃/10 a,and UHI intensity was higher in dry season than that in rainy season.The change trend of air pollutants level in Kunming was in accordance with that of the UHI intensity.When UHI intensity reached peak value,air pollutants showed high concentration.UHI intensity had significantly positive correlation with air pollutants level.Annual mean UHI intensity had significantly positive correlation with PM 10 level under the likelihood of 95%,but monthly mean UHI intensity had significantly positive correlation with NO2 level under the likelihood of 99%.In addition,annual statistics days with Grade I air quality obviously decreased with the strengthenment of UHI intensity.Therefore,air quality in Kunming City turned more deteriorated with the enhancement of UHI intensity.[Conclusion] The research findings provided a valid scientific basis for the mitigation of UHI and improvement of the atmospheric environment in Kunming.