西宁市空气质量现状及其与近地层逆温的关系
2021-04-21李京梅王镜盛嘉誉
李京梅 王镜 盛嘉誉



摘 要:本文利用2014—2018年西宁市气象探空资料和大气污染物日均数据,采用统计对比分析、相关性分析方法,对西宁市空气质量现状及其与近地层逆温的关系进行分析。结果表明,5年中,西宁市空气质量达标率为79.8%,年污染日数整体呈下降趋势;PM10作为首要污染物,出现频率最高;6种污染物中,仅O3浓度夏半年大于冬半年,其余均表现为冬半年大于夏半年;07:00逆温厚度与19:00逆温强度对污染物浓度影响较大。
关键词:大气污染;逆温;相关性
中图分类号:X16;X513文献标识码:A文章编号:1003-5168(2021)02-0143-03
The Air Quality Status of Xining City and Its Relationship with the Surface Temperature Inversion
LI Jingmei WANG Jing SHENG Jiayu
(Xining Meteorological Bureau,Xining Qinghai 810016)
Abstract: Based on the meteorological sounding data and daily average data of air pollutants in Xining City from 2014 to 2018, this paper analyzed the current situation of air quality in Xining City and the relationship between air quality and surface layer inversion. The results show that in the five years, Xining's air quality compliance rate was 79.8%, and the number of annual pollution days showed an overall downward trend; PM10 was the primary pollutant with the highest frequency; among the six pollutants, only the concentration of O3 in summer was greater than in winter, the rest showed that the winter half year was greater than the summer half year; the thickness of the inversion at 07:00 and the intensity of the inversion at 19:00 had a greater impact on the pollutant concentration.
Keywords: air pollution;inversion;correlation
隨着现代工业的快速发展,有害气体排放量增多,全国大范围空气质量下降,不利天气条件下,污染天气时有出现。空气质量已经成为政府和公众普遍关注的问题。华北、东北、华中等污染天气多发地区对此进行了大量研究。其中,欧娜音[1]等对持续性逆温天气对哈尔滨市空气质量的影响进行研究,徐洁玲[2]等对九江市重污染天气形势特征及污染源进行分析,黄勇[3]等针对气候变化对安徽省大气污染扩散能力的影响开展了大量工作。但针对高原空气质量的研究较少。西宁市地处青藏高原东部,是高原上规模最大的省会城市。西宁市委、市政府对生态环境保护、空气污染防治工作极为重视,了解西宁市空气质量变化特征及其与大气运动的关系很有必要。
1 资料与方法
本文气象资料选取2014—2018年西宁站(101°45′E,36°43′N,海拔2 297 m)探空资料。环境资料选取中国空气质量在线监测分析平台提供的大气污染物日数据。……
