江西省空气负离子浓度特征与气象因子相关分析  

Correlation analysis of negative air ion concentration and meteorological factors in Jiangxi

作　　者：方砚秋 张方敏 陈龙 李柏贞 王怀清 FANG Yanqiu;ZHANG Fangmin;CHEN Long;LI Bozhen;WANG Huaiqing(Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Jiangsu Key Laboratory of Agricultural Meteorology,College of Applied Meteorology,Nanjing University of Information Science&Technology,Nanjing 210044,China;Jiangxi Ecological Meteorology Center,Nanchang 330096,China;Jiangxi Climate Center,Nanchang 330096,China)

机构地区：[1]南京信息工程大学应用气象学院气象灾害预报预警与评估协同创新中心/江苏省农业气象重点实验室,南京210044 [2]江西省生态气象中心,南昌330096 [3]江西省气候中心,南昌330096

出　　处：《气象科学》2022年第2期254-260,共7页Journal of the Meteorological Sciences

基　　金：国家重点研发计划项目(2018YFC1506606);中国气象局气候变化专项(CCSF201928)。

摘　　要：利用2019年江西省靖安森林试验基地观测资料,分析了靖安森林站空气负离子浓度不同时间尺度的变化特征及其与气象因子的相关性,以及不同天气条件对其的影响。结果表明,靖安市年平均空气负离子浓度为2187个/cm^(3),其中夏季浓度最高为2910个/cm^(3),秋季最低为1756个/cm^(3)。此外,浓度日变化特征也存在明显的季节差异性,其中春夏秋冬四季峰值分别出现在10时(北京时,下同)、06时、09时、13时左右。日尺度上浓度与气温、降水、相对湿度均呈显著的正相关,月尺度上其与降水呈显著正相关。雨天的浓度高于晴天,四个季节雨天峰值分别出现在开始降水的7~9 h、7~15 h、9 h、9~11 h后。当降水量在0~10 mm时,降水对空气负离子浓度没有明显作用,随后浓度随降水量增加而上升,当出现暴雨天气的时候,浓度反而呈现下降趋势。Using the observational data of Jing'an Forest Experimental Base in 2019,the characteristics of negative air ion concentration variation at different time scales were analyzed in this paper.Besides,the correlation between the concentration and meteorological factors,as well as the influence of different weather conditions on it were also provided.The results showed that the annual average concentration of negative air ions in Jing'an was 2187个/cm^(-3),of which the highest concentration was 2910个/cm^(-3) in summer,and the lowest was 1756个/cm^(-3) in autumn.In addition,seasonal differences of concentrations can be seen in the characteristics of diurnal variation,with the peak of spring,summer,autumn and winter appeared at around 10∶00 BST,06∶00 BST,09∶00 BST and 13∶00 BST,respectively.On the daily scale,significant positive correlation can be seen between the negative air ion concentration and the temperature,precipitation and relative humidity,while on the monthly scale,the concentration is only significantly positively correlated with the precipitation.The concentration of negative air ions in rainy days was higher than that in sunny days.The peak concentrations in spring,summer,autumn and winter appeared at 7-9 h,7-15 h,9 h and 9-11 h after the onset of rainfall,respectively.When the precipitation was 0-10 mm,it had no obvious effect on the concentration of negative air ions,and then the concentration of negative air ions increased with the gradual increase of precipitation.The concentration of negative air ions showed a downward trend during rainstorm.

关 键 词：空气负离子浓度 气象因子 降水 

分 类 号：P46[天文地球—大气科学及气象学]