晴空条件下华北平原城市气溶胶观测个例分析  

Aerosol Observation in Cities of North China Plain Under Clear Day Condition

作　　者：胡向峰[1,2] 段宇辉[2,3] 孙玉稳[1,2] 吴志会[1,2] 董晓波[1,2] 

机构地区：[1]河北省人工影响天气办公室,石家庄050021 [2]河北省气象与生态环境重点实验室,石家庄050021 [3]河北省气象台,石家庄050021

出　　处：《中国农学通报》2016年第11期167-176,共10页Chinese Agricultural Science Bulletin

基　　金：河北省科技支撑计划项目"河北省旱季人工增雨(雪)防灾减灾关键技术研究"(11277107D);公益性行业(气象)科研专项"层状云人工增雨作业条件识别和效果分析技术"(GYHY201206003)

摘　　要：为了探讨气溶胶污染的微观特征及可能原因,利用2008年10月19日一次飞机探测的资料,对保定和石家庄的气溶胶分布特征进行对比分析。结果发现:保定边界层内气溶胶数浓度垂直递减明显,边界层以上接近背景气溶胶。石家庄边界层附近气溶胶浓度出现累积,边界层以上数浓度迅速降低,2300 m出现峰值。逆温层和相对湿度峰值附近累积的较高浓度的气溶胶是影响气溶胶垂直分布的重要原因。气溶胶数浓度和平均直径与相对湿度并不完全呈正相关。1500 m以下气溶胶浓度与局地排放源有直接关系,人为活动及风速是影响气溶胶水平分布的重要因素。区域输送对混合层以上气溶胶浓度的影响较大。保定不同高度层的粒子谱均呈单峰分布,石家庄低层粒子谱呈双峰或三峰分布。In order to find the possible causes and micro characteristics of aerosol pollution, based on theairplane detection data on Oct 19 th, 2008, the aerosol distribution characteristics over Baoding andShijiazhuang were contrasted and analyzed. The results showed that： the aerosol number concentrationdeclined obviously under boundary layer, and approached background concentration of aerosol above boundarylayer. The aerosol number concentration was accumulated near the boundary layer over Shijiazhuang, declinedrapidly above the boundary layer, presented a peak value at the height of 2300 m. There were different verticaldistribution characteristics near the boundary layer top. The inversion layer and relative humidity had a greatimpact on the vertical distribution of aerosol. The number concentration and mean diameter did not completelyand positively correlate with relative humidity. The aerosol number concentration was directly related withregional emission sources below 1500 m, human activities and wind speed were important factors influencingthe horizontal distribution of aerosol. The aerosol number concentration above mixed layer was mainly affectedby regional transport. The aerosol particle spectrum at different height levels presented unimodal pattern overBaoding and bimodal or three-modal pattern at lower levels over Shijiazhuang.

关 键 词：气溶胶 华北平原 气象因素 垂直廓线 谱分布 

分 类 号：X412.24[环境科学与工程—灾害防治]