城市空气湿度变化特征及其对颗粒物浓度的影响  

CHARACTERISTICS OF URBAN AIR HUMIDITY AND ITS IMPACT ON PARTICLE

作　　者：王超 肖天贵 罗琴 吴利彬 张亚春 文晓航 WANG Chao;XIAO Tian-gui;LUO Qin;WU Li-bin;ZHANG Ya-chun;WEN Xiao-hang(Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, College of Atmospheric Sciences, 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,成都610225 [2]成都市温江气象局,成都610000

出　　处：《环境工程》2018年第6期116-121,127,共7页Environmental Engineering

基　　金：公益性行业气象科研专项(GYHY201406015);国家自然科学基金(91337215;41505122);国家科技支撑计划(2015BAC03B05);成都信息工程大学科研基金(CRF201606);温江区科技局项目(WJKJXM);四川省社会科学研究规划重大项目(四川省雾霾成因与治理机制研究2015);四川省教育厅项目(2018SZ0287)

摘　　要：为研究城市空气湿度变化特征以及对颗粒物浓度的影响,选取以成都为例,利用相对湿度、绝对湿度及其颗粒物(PM_(10)、PM_(2.5))浓度值,分析了成都市空气湿度不同时间尺度变化特征及其对颗粒物的影响,结果表明:成都市平均相对湿度、绝对湿度分别为77.10%、11.40 g/m^3,其中相对湿度多集中在80%~95%,绝对湿度集中在4.5~10.5 g/m^3,近5年两类湿度参量均有逐年增加的趋势,但两者在年、季节、日变化特征差异较大,多项式拟合可以较好的模拟成都市湿度参量的变化特征;两类湿度参量对颗粒物浓度的影响表现不同,相对湿度越大时,空气越趋近饱和,颗粒物浓度偏高,而绝对湿度越大时,大气湿沉降作用强,颗粒物浓度偏低。For studying the characteristics of urban air humidity and its impact on particle,taking the observation data from Chengdu as an example,the hourly data of relative humidity,absolute humidity and concentration of particulate matter（ PM10,PM（2. 5）） were studied,and the results showed that： The average of relative humidity,absolute humidity of Chengdu was77. 10%,11. 40 g/m^3,respectively. The distribution of relative humidity was concentrated at 80% ～ 95%,while the distribution of absolute humidity was concentrated at 4. 5 ～ 10. 5 g/m^3. Although,those two humidity parameters tended to increase,the annual,seasonal,daily variation characteristics were quite different,and the variations were fitted well by cubic curve-fitting equation. The effects of two humidity parameters on particle concentration were different; the greater the relative humidity was,the more saturate the air tended,and particle concentration was higher; when absolute humidity was higher,the atmospheric wet deposition got stronger,and particle concentration was lower.

关 键 词：相对湿度 绝对湿度 颗粒物浓度 变化特征 

分 类 号：X513[环境科学与工程—环境工程]