文献类型：期刊文献

中文题名：春季典型天气下城市街头绿地内大气颗粒物浓度变化特征

英文题名：Concentration variations of atmospheric particulate matters in street greenbelts under typical weather conditions in spring

作者：王晓磊[1] 王成[1] 古琳[1] 王艳英[1] 王茜[1]

第一作者：王晓磊

机构：[1]中国林业科学研究院林业研究所,国家林业局城市森林研究中心,国家林业局森林培育重点实验室

年份：2014

卷号：33

期号：11

起止页码：2889-2896

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家林业公益性行业科研专项(201304301-05)资助

语种：中文

中文关键词：典型天气条件;大气颗粒物;浓度;街头绿地

外文关键词：typical weather condition; atmospheric particulate matter; concentration; street greenbelt.

分类号：S725.1

摘要：以无锡市河埒口休闲广场街头绿地为对象,研究了典型天气条件（晴天、多云、雨后阴天）下绿地内4种粒径颗粒物（TSP、PM10、PM2.5和PM1）的质量浓度变化规律及其影响因素。结果表明：（1）绿地内TSP、PM10、PM2.5和PM1质量浓度日均值均为：晴天〈多云〈雨后阴天。雨后阴天的PM10、PM2.5和PM1浓度均极显著高于晴天和多云,多云天气的PM2.5和PM1浓度极显著高于晴天。多云和阴天天气下PM2.5和PM1质量浓度的增幅远高于TSP和PM10。（2）在观测时段内,晴天和多云4种粒径颗粒物的日变化曲线基本一致,上午浓度高于下午,7：00和13：00—15：00分别出现峰值和低谷;雨后阴天时,随时间推进颗粒物浓度呈递增趋势。晴天时小粒径颗粒物所占比例日变化与其浓度协同变化,多云和雨后阴天时则基本呈相悖状态。（3）3种天气条件下,街头绿地内仅晴天时PM2.5浓度达到国家二类功能区质量要求,其他均超出二级浓度限值。（4）晴天街头绿地内主要为粒径2.5～10μm的PM10污染,污染较轻;而多云和雨后阴天时TSP、PM10和PM2.5污染均较严重,TSP污染以粒径〈10μm的颗粒物为主,PM10以粒径〈2.5μm的为主,PM2.5主要为1～2.5μm范围内的颗粒物污染。（5）空气相对湿度是无锡高湿环境下影响颗粒物浓度的最主要因子。晴天,颗粒物浓度与风速、气温、光照强度呈显著负相关,与相对湿度、车流量呈显著正相关;多云天气大气颗粒物浓度与湿度呈显著正相关,与其他因素相关性均未达显著水平;雨后阴天时大气颗粒物浓度与湿度呈负相关,与其他指标相关性不显著。
Taking Heliekou Leisure Square in Wuxi City as an object, the diurnal concentration variation of atmospheric particulate matters with four diameters in street greenbelts were measured under typical weather conditions in spring. Meanwhile, the influence factors including micro-me- teorological factors and traffic flow were also observed. The results indicated that ： （ 1 ） The daily mean concentrations of TSP, PM10, PM2.5 and PM1 in street greenbehs under different weather conditions were in order of sunny 〈 cloudy 〈 overcast. The particulate matter concentrations of the four diameters on overcast days were significantly higher than on cloudy and sunny days, and the concentrations of PM2.5 and PM1 on cloudy days were significantly higher than on sunny days. The increment percentages of PM2.5 and PM1 on cloudy and overcast days were far higher than that of the TSP and PM10. （2） During the observation period, atmospheric particulate matter showed obvious diurnal variation under different weather conditions. It was consistent on sunny and cloudy days. Particulate matter concentration of the four diameters all presented one oeak at 7-00 and one valley at 13：00-15：00, and it was higher in morning than in afternoon. On overcast days, it showed an increasing trend with time advancing for the four diameters. Dail） variation of ratios of finer particles and atmospheric partieulate matter eoneentration was eonsistenl on sunny days, while that of both cloudy and overcast days was contrary. （3） The particulale matter concentrations all exceeded the second-class concentration limits of China＇ s National Am- bient Air Quality Standards except PM2.5 concentration on sunny days. （4） 2.5-10 Ixm particle was the main pollutant on sunny days, being on a slight pollution level, while TSP, PM10 and PM2.5 were the main pollutants on cloudy and overcast days, being on a serious pollution. TSP pollution was mainly consisted of particle size 〈10 μm, PM10 mainly of particle size 〈2.5μm, PM25 mainly of 1-2.5μm. （5） Air relative humidity was the most important factor under humid environment in the studied region. On sunny days, the particulate matter concentrations of the four diameters were significantly negatively eorrelated with wind speed, air temperature, and lighl intensity, and significantly positively correlated with relative humidity and traffic flow. On cloud days, they were signifieantly positively correlated with relative humidity, but significantly nega tively eorrelated with relative humidity on overcast days.