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北京冬春和夏初大气O3浓度的垂直分布特征
谷雨,高庆先,马占云,张艳艳,刘 婷,郑有飞,等
1.内蒙古自治区环境监测中心站;2.中国环境科学研究院;3.河北廊坊市气象局;4.江苏省大气环境监测与污染控制高技术研究重点实验室
摘要:
为探究北京地区不同季节大气O3浓度垂直分布特征,于2010年12月1日—2011年3月31日(冬春季)和2011年5月7日—2011年6月9日(夏初)每天08:00—10:00之间,在北京北部地区的中国环境科学研究院内,利用第三代移动式大气环境激光雷达系统,对??SO2)、???O2)以及??O3)和气溶胶后向散射系数垂直方向和垂直剖面进行实验观测,并结合天气要素的变化进行了分析研究。结果表明:①??O3)存在明显的季节变化,表现为夏季>春季>冬季,同时晴天、微风、逆温条件等气象背景是O3污染过程出现的主要气象因素,在微风和南风的情况下,会出现高??O3)带,在北风影响情况下,??O3)相对较低,雨水冲洗的作用对??O3)分布也有明显的影响;②??O3)的日变化曲线呈单峰单谷型,??O3 ) 峰值一般出现在14:00—16:00之间,谷值则出现在22:00—翌日09:00之间;③O3垂直分布有呈现单峰、双峰、多峰型分布等多种垂直分布特征,10km以上高空这3种分布特征均有出现,但是在5km以下的近地面O3垂直和斜程分布基本呈现多峰型,斜程方向上??O3)的高低与下垫面及其所排放的O3前体物有密切的关系;④??O3)垂直分布呈现一定的不均匀性,其数值范围浮动比较小,最大值之间相差30×10-9. 研究显示,??O3)垂直规律主要表现出两种分布特征,一种是在3~5km处有高浓度的堆积区,另一种是则没有明显高值堆积区.
关键词:  移动式大气环境激光雷达系统  O3  季节  垂直分布  北京
DOI:
分类号:X651
基金项目:公益性行业科研专项(20150904/20150940);首都蓝天行动培育(Z17110000617002)
Vertical Distribution Characteristics of Atmospheric Ozone in Beijing in Winter, Spring and Early Summer
GU Yu1,2,3, GAO Qing-Xian4, MA Zhan-Yun4, ZHANG Yan-Yan5, LIU Ting6, ZHENG You-Fei6
1.Environmental Monitoring Center Station Of Inner Mongolia Autonomous;2.Huhehaote;3.China;4.Chinese Research Academy Of Environmental Sciences;5.Meteorological Bureau Of Langfang of Hebei Province,Langfang;6.Jiangsu Key Laboratory Of Atmosphere Environment Montorng Pollution Control
Abstract:
Based on the third generation mobile atmospheric laser radar system, ?(O3) was measured between 08:00 and 10:00A.M. during December 1st, 2010 to March 31st, 2011 and May 7th to June 9th in 2011, in Chinese Environmental Science Research Institute located in the northern of Beijing, in order to study the vertical distribution characteristics of ??O3) in Spring, Summer and Winter. The results show that ??O3) is the highest in Summer, but the lowest in Winter, among the Spring, Summer and Winter three seasons. And the control fator of ozone pollution is the meteorological background(the sunny day, gentle breeze and inversion conditions). The diurnal variation of ? (O3) showed a single peak and valley. The peak of ? (O3) appeared between 14:00 and 16:00 in the afternoon, and the valley of ? (O3) appeared between 22:00 and 09:00 of next day in the night. Also, the single peak, the double-peak and the multi-peak were appeared in the vertical distribution of ? (O3) above 10km. However, the vertical and oblique distributions of ? (O3) mainly appeared multi-peak below 5km, and the skew distribution of ??O3) is closely related to the underlying surface and O3’s precursors. The verticle distribution of ? (O3) was inhomogeneities, The verticle distribution of ? (O3) was inhomogeneities, but the diffrerence of ? (O3) was 30ⅹ 10-9. The vertical law of ??O3) mainly exhibits two distribution characteristics, one is the accumulation area with high concentration at 3~5 km, and the other is no obvious high value accumulation area.
Key words:  mobile atmospheric laser radar system  O3  vertical distribution