盆地城市地气温差变化特征及对颗粒物浓度的影响  

Variations of difference between surface temperature and air temperature and its impact on aerosol concentration in basin city

作　　者：王超 肖天贵 罗琴 吴利彬 刘雅静 文晓航 WANG Chao;XIAO Tiangui;LUO Qin;WU Libin;LIU Yajing;WEN Xiaohang(College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, China;Wenjiang Meteorological Bureau, Chengdu 610000, China)

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610225 [2]成都市温江气象局,四川成都610000

出　　处：《中国粉体技术》2018年第3期76-80,92,共6页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:91337215;国家科技支撑计划项目:编号2015BAC03B05;四川省教育厅项目:编号2018SZ0287;成都信息工程大学科研基金项目:编号:CRF201606;成都市温江区科技局项目,编号:WJKJXM

摘　　要：观测四川盆地典型城市成都连续5 a逐小时的地表温度(T_s)、气温(T_a)及其颗粒物(PM_(10)、PM_(2.5))质量浓度等,分析地气温差(T_s-T_a)的变化特征及其对颗粒物质量浓度的影响。结果表明:平均地气温差为2.01℃,地气温差0.3~1.2℃,变化幅度较小;地气温差年变化最大时出现在4月,最小时出现在11月,三次拟合曲线可以较好地模拟成都温差的年变化特征;地气温差日变化显著,在不同季节中变化趋势大致相同,极值大小差异较大,分段拟合对温差日变化特征模拟较好;颗粒物污染明显,地气温差较小时,颗粒物质量浓度偏大,反之偏小。With the hourly data of land surface temperature（Ts）,air temperature（Ta） and aerosol mass concentration, the characteristics of the difference between surface temperature and air temperature（Ts-Ta） and its impacts on aerosol concentration were studied. The results show that the average air temprature is 2.01℃ and the distribution of average air temperature is0.3～1.2℃. The maximum value of（Ts-Ta） appeares in April while the minimum in November. The annual change variations are fitted well by cubic curve fitting equation. Diurnal variation of（Ts-Ta） is significant. Although the variations in four seasons have similarly changing tendency, the extremum values are different. The aerosol pollution in Chengdu is serious. The effects of（Ts-Ta） on aerosol concentration is significant, the greater the（Ts-Ta）, aerosol concentration is low, otherwise, the reverse.

关 键 词：盆地城市 地气温差 大气颗粒物 

分 类 号：P421.1[天文地球—大气科学及气象学]