引用本文:杜吴鹏,高庆先,孙 丹,师华定,等.中国春季北方大气气溶胶浓度特征[J].环境科学研究,2011,24(1):11-18.
DU Wu peng,GAO Qing xian,SUN Dan,SHI Hua ding,et al.Concentration Characteristics of Atmospheric Aerosols in Northern China in Spring[J].Reserrch of Environmental Science,2011,24(1):11-18.]
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中国春季北方大气气溶胶浓度特征
杜吴鹏,高庆先,孙丹,师华定
1. 北京市气象局气候中心,北京,100089
2. 中国环境科学研究院,北京,100012
3. 中国科学院大气物理研究所,北京,100029
摘要:
采用2008年和2009年春季10个气溶胶观测站资料,分析了我国北方3个代表区域的气溶胶浓度特征与空间分布特点以及气溶胶粒子粒径的异同,并结合一次典型的沙尘天气过程,利用气溶胶和气象资料,讨论了沙尘天气对ρ(TSP)的影响以及各观测站点ρ(TSP)的变化特点. 结果表明:西北区域站点ρ(TSP)最高,达到0.488 mg/m【sup】3【/sup】,其中以沙尘和土壤等粗模态粒子为主,占ρ(TSP)的50.7%;北部区域站点ρ(TSP)为0.350 mg/m【sup】3【/sup】,主要由PM【sub】2.5【/sub】及沙尘、土壤等粗模态粒子组成,它们分别占ρ(TSP)的55.7%和30.9%;北京地区ρ(TSP)最低,平均值为0.252 mg/m【sup】3【/sup】,ρ(PM【sub】10)【/sub】占ρ(TSP)比例较高,达到94.4%,其中ρ(PM【sub】2.5)【/sub】占ρ(TSP)的54.7%;沙尘天气强度和发生次数对气溶胶浓度年际变化影响明显,而天气形势对沙尘天气的发生发挥重要作用.
关键词:  春季  气溶胶  沙尘天气  TSP  PM
DOI:
分类号:
基金项目:国家“十一五”科技支撑计划项目(2008BAC40B01-5);国家重点基础研究发展规划项目(2010CB428506);国家环保公益性行业科研专项(200709008)
Concentration Characteristics of Atmospheric Aerosols in Northern China in Spring
DU Wu-peng,GAO Qing-xian,SUN Dan,SHI Hua-ding
Abstract:
This paper presents analysis of aerosol concentration characteristics, spatial distribution, and particle size similarities and differences in three typical regions in northern China based of aerosol observation data from ten sites in spring of 2008 and 2009. Using aerosol and meteorology data, the impact of dust-sand weather on TSP mass concentration and its variation in the observation sites are discussed. The research results show that the TSP mass concentration was the highest at the northwestern regional sites, reaching 0.488 mg/m【sup】3【/sup】. Dust-sand and soil coarse mode particles were the primary components, with a proportion of 50.7%. The TSP mass concentration was 0.350 mg/m【sup】3【/sup】 at the northern regional sites, at which the TSP was mainly composed of PM【sub】2.5【/sub】, dust-sand and soil coarse mode particles, which accounted for 55.7% and 30.9%, respectively. The TSP mass concentration was the lowest at the Beijing regional sites, with average value 0.252 mg/m【sup】3【/sup】. PM【sub】10【/sub】 mass concentration was higher, reaching 94.4% of TSP, of which 54.7% was PM【sub】2.5【/sub】. In addition, the intensity and frequency of dust-sand weather had significant impacts on annual variation of aerosol concentration, and weather played an important role in the emergence of dust-sand weather.
Key words:  spring  aerosol  dust-sand weather  TSP  PM