| 银川市大气混合层高度变化特征及其与空气污染的关系 |
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| 引用本文： | 马宁,任芝花,王建英,杨有林,卫建国,李新庆.银川市大气混合层高度变化特征及其与空气污染的关系[J].气候与环境研究,2022,27(4):495-503. |
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| 作者姓名： | 马宁 任芝花 王建英 杨有林 卫建国 李新庆 |
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| 作者单位： | 1.中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室，银川 7500022.宁夏气象防灾减灾重点实验室，银川 7500023.宁夏气象信息中心，银川 7500024.国家气象信息中心，北京 100081 |
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| 基金项目： | 国家自然科学基金项目91744209，宁夏回族自治区重点研发计划项目2019BFG02025、2021BEG03006 |
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| 摘 要： | 基于银川高空站2008～2017年的L波段秒级数据和地面观测数据，利用干绝热法计算银川2008～2017年逐时大气混合层高度，分析其变化特征，同时利用银川6种污染物的质量浓度和AQI指数，分析大气混合层高度与空气污染物的关系。结果表明:银川市的大气混合层高度（MLH）大部时间在600 m以下，占比为68%；银川MLH具有明显的单峰型日变化特征，07:00（北京时间，下同）最低，16:00最高；各月MLH值在282～936 m，4～6月MLH值最高，12月MLH值最低；季节变化方面，春季最高，夏季次之，冬季最低；年变化方面，2012年MLH平均值最高为621 m，2015年最低为566 m；银川市6种污染物除O3外，其余5种污染物的质量浓度与MLH值都为负相关，O3与MLH值的相关性最好；四季中，冬季污染物浓度与MLH值的相关性最好，夏季最差，秋季好于春季;银川MLH值与AQI指数呈负相关。
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| 关 键 词： | 银川 大气混合层高度 空气污染 |
| 收稿时间： | 2021-01-13 |
Variation Characteristics of the Atmospheric Mixed Layer Height and Their Telation to the Air Pollution in Yinchuan |
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| Ning MA,Zhihua REN,Jianying WANG,Youlin YANG,Jianguo WEI,Xinqing LI.Variation Characteristics of the Atmospheric Mixed Layer Height and Their Telation to the Air Pollution in Yinchuan[J].Climatic and Environmental Research,2022,27(4):495-503. |
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| Authors: | Ning MA Zhihua REN Jianying WANG Youlin YANG Jianguo WEI Xinqing LI |
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| Institution: | 1.Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, China Meteorological Administration, Yinchuan 7500022.Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan 7500023.NingxiaMeteorological Information Center, Yinchuan 7500024.National Meteorological Information Center, Beijing 100081 |
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| Abstract: | Based on the high L-band second-level and ground observation data from the Yinchuan high-altitude station from 2008 to 2017, the time-divided atmospheric mixed layer height (MLH) was calculated for that time period using the dry adiabatic method, and its variation characteristics were analyzed. Simultaneously, the six pollutants in Yinchuan were used for the analysis. The mass concentration and air quality index (AQI) were used to determine the correlation between the atmospheric MLH and air pollutants. The results indicated that the majority of the MLH in Yinchuan was below 600 m, accounting for 68% of the total. Yinchuan MLH has a distinct single-peak diurnal variation, with the lowest at 0700 LST in the morning and the highest at 1600 LST in the evening. The monthly MLH values ranged from 282 m to 936 m; MLH values were the highest from April to June, with the lowest values in December. Furthermore, seasonal changes were the highest in spring, followed by summer and winter. Considering the annual changes, the highest average MLH was 621 m in 2012, and the lowest was 566 m in 2015. In addition to O3, the concentrations of the rest five pollutants in Yinchuan are negatively correlated with the MLH value, with the best correlation being between O3 and MLH values. Moreover, the best correlation was found between the winter pollutant concentration, and the MLH value was the best in winter, followed by autumn, spring, and worst in summer. The Yinchuan MLH value was negatively correlated to the AQI index of the city. |
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