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.
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)
出处
《中国粉体技术》
CAS
CSCD
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
关键词
盆地城市
地气温差
大气颗粒物
basin city
differences between ground and air temperatures
aerosol
