2017-2018年阿克达拉O3浓度特征及气象因子分析  

Variation Characteristics and Meteorological Factors of Surface Ozone Concentration in Akedala in Recent Two Years

作　　者：李淑婷 李霞[1] 钟玉婷[1] 王定定 陆辉[1] 王楠 LI Shuting;LI Xia;ZHONG Yuting;WANG Dingding;LU Hui;WANG Nan(Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China;Akedala Atmosphere Background Station,Altay 836000,China)

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]阿克达拉大气本底站,新疆阿勒泰836000

出　　处：《沙漠与绿洲气象》2020年第1期115-122,共8页Desert and Oasis Meteorology

基　　金：中国气象沙漠气象研究基金(Sqj2018018);中央级公益性科研院所基本科研业务费专项资金项目(IDM2019003)。

摘　　要：利用2017—2018年阿克达拉逐时O3浓度监测数据和同期气象观测资料,分析阿克达拉近地面O3浓度的日变化和年季变化特征,并探究O3浓度与气象条件之间的关系。结果表明:O3浓度日变化呈现单峰型,下午16时前后达到最高值,最高值分别为91.72μg/m^3和82.11μg/m^3;2017年和2018年阿克达拉O3最高月分别出现在3月和2月,月平均O3浓度分别为105.65μg/m^3和81.19μg/m^3,最低月出现在12月,浓度分别为39.29μg/m^3和40.45μg/m^3;2017—2018年阿克达拉近地面O3浓度的季节变化规律为:春季>夏季>冬季>秋季;阿克达拉的主导风向是NW和E,夏季主导风向为NW,冬季则以偏东风为主,夏季受西北气流影响,阿克达拉西北方向的污染源对当地近地面O3浓度影响较大;通过对2017年和2018年O3浓度日变化不显著阶段的个例分析,发现阿克达拉春季日变化不显著的高浓度O3可能来自于远距离输送。Based on the hourly measured ozone mass concentration and meteorological observation data of the same period from 2017 to 2018 at Akedala Atmospheric Background Station,the characteristics of daily,seasonal and annual variation of O3 concentration were analyzed,the relationship between ozone concentration and meteorological conditions were also explored.The results showed that the diurnal variation of ozone concentration showed a unimodal pattern,the peak value of O3 concentration appearing around 16:00 p.m.,and the highest value was 91.72μg/m^3 and 82.11μg/m^3,respectively.In 2017 and 2018,the highest monthly average O3 concentrations occurred in March and February respectively,with O3 concentrations of 105.65μg/m^3 and 81.19μg/m^3.The lowest monthly average O3 concentrations occurred in December both in 2017 and 2018 with concentrations of 39.29μg/m^3 and 40.45μg/m^3.A seasonal variation trend of ozone in aerosols near the ground was observed as follows:spring>summer>winter>autumn.The dominant wind direction in Akedala was NW and E,which was NW in summer and mainly easterly in winter.In summer,affected by the northwest airflow,pollution sources in the northwest direction of Akedala had a great impact on the local nearsurface O3 concentration.Based on the case analysis of the non significant period of daily variation of O3 concentrations in 2017 and 2018,we found that the inconspicuous diurnal variation of O3 in the spring of Akedala may come from long-distance transport.

关 键 词：臭氧 变化特征 气象要素 阿克达拉 

分 类 号：X16[环境科学与工程—环境科学]