南京市夏季城市不同功能区气溶胶污染特征  

Analysis of aerosol pollution characteristics in summer in various functional areas of Nanjing

作　　者：王红磊[1] 朱彬[1] 马梁臣[1] 陈澍[1] 陈聪[1] 王鹏[1] 

机构地区：[1]南京信息工程大学大气物理学院,南京210044

出　　处：《南京信息工程大学学报（自然科学版）》2010年第3期221-229,共9页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：江苏省高等学校大学生实践创新训练计划项目[苏教高(2008)34号];公益性行业(气象)科研专项(GYHY200806001-1-1);国家973计划(2009CB426313);国家973计划(2006CB932504)

摘　　要：利用WPS(宽范围颗粒粒径谱仪)、Anderson-Ⅱ型9级撞击采样器测量了2008年夏季典型日南京钟山风景区、鼓楼商业区与江北工业区大气气溶胶数浓度谱分布和质量浓度,分析了城市不同功能区气溶胶粒子的分布特征.结果表明:各功能区大气颗粒物浓度均比较高,达到104cm-3,数浓度谱均为单峰型,峰值集中在0.01～0.04μm;其中气溶胶粒子数浓度主要集中在0.01～0.2μm粒径范围内,其日变化受汽车尾气排放、混合层高度变化的影响较大,且呈现明显的双峰型;粒径为0.01～0.1μm的超细粒子对总数粒子贡献较大,鼓楼为93.28%,江北为81.66%,钟山为66.52%;细粒子(粒径<1.1μm)与TSP质量浓度的比值钟山为9.2%,鼓楼33.77%,江北24.98%;质量浓度主要为粗粒子(粒径≥1.1μm)贡献,但是鼓楼与江北的细粒子的贡献也非常大,说明这两个功能区的细粒子的污染值得关注;数浓度和相对湿度(RH)有密切联系,当RH<75%时其峰值随着相对湿度的增大而增大,当RH>75%时其峰值随着相对湿度的增大而减少,并且相对湿度对细粒子的影响要大于对大粒子的影响.This article analyzes the distribution of aerosol particles in various functional areas of Nanjing.Measurements of size-resolved particle number concentrations and mass concentrations during summer 2008 were made by means of Wide-Range Particle Spectrometer and Anderson-Ⅱ-type 9 crash sampler,at Zhongshan Scenic Area,Drum Tower Plaza and Jiangbei Industrial District of Nanjing.Results show that all functional areas have a high atmospheric particle concentration that reaches 104 cm-3.The concentration spectra are all single-peaked,the peak values of which are in the range of 0.01～0.04 μm.Of these characteristics,aerosol particle number concentrations mainly range from 0.01 to 0.2 μm in size,and its daily variation is largely affected by vehicle exhaust emissions and mixed-layer height changes,showing a clear bimodal type;0.01～0.1 μm particle-sized ultrafine particles make greater contributions to the total number of particles,statistically,66.52% for Zhongshan Scenic Area,93.28% for Drum Tower Plaza,81.66% for Jiangbei Industrial District.The ratio of fine particles（diameter 1.1 μm） to the TSP mass concentration is respectively as follows：Zhongshan Scenic Area is 9.2%,Drum Tower Plaza 33.77%,Jiangbei Industrial District 24.98%.Coarse particles（diameter≥1.1 μm） make predominant contributions to the parameters of mass concentration.Significant contributions made by fine particles to mass concentration in Drum Tower Plaza and Jiangbei Industrial District indicate that these two functional areas are seriously polluted by fine particles.Number concentration and relative humidity（RH） are closely linked：when RH75%,its peak value rises with the increase of RH;when RH75%,its peak value decreases with the increase of RH,and the impact of RH on fine particles is greater than that on course particles.

关 键 词：南京 大气气溶胶 污染特征 数浓度 质量浓度 

分 类 号：P401[天文地球—大气物理学与大气环境]