天山南北绿洲城市重污染期对流层NO_2垂直柱浓度时空分布特征  

Spatiotemporal distribution of NO_2 in oasis cities between south and north Tianshan Mountains during heavy air pollution

作　　者：仝泽鹏 李艳红[1,2] 刘岩 侯小刚[3] TONG Zepeng;LI Yanhong;LIU Yan;HOU Xiaogang(College of Geography Science and Tourism,Xinjiang Normal University,Urumqi Xinjiang 830054;Key Laboratory of Xinjiang Uygur Autonomous Region,Xinjiang Laboratory of Lake Environment and Resources in Arid Area,Urumqi Xinjiang 830054;Xinjiang Uygur Autonomous Region Climate Center,Urumqi Xinjiang 830002)

机构地区：[1]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐830054 [2]新疆维吾尔自治区重点实验室新疆干旱区湖泊环境与资源实验室,新疆乌鲁木齐830054 [3]新疆维吾尔自治区气候中心,新疆乌鲁木齐830002

出　　处：《环境污染与防治》2018年第7期812-818,共7页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41761007);新疆师范大学人文社会科学重点研究基地招标课题(No.XJNURWJD062017A01);新疆师范大学硕士研究生科研创新基金资助项目(No.XSY201702009)

摘　　要：为探讨天山南北绿洲城市重污染期对流层NO_2的垂直柱浓度(VCD)分布特征,利用多轴差分吸收光谱仪(MAX-DOAS)对2015—2017年重污染期间天山北坡乌鲁木齐、石河子、小城市博乐及南坡中等城市库尔勒、小城市和田市区进行定点监测和车载移动监测,研究NO_2VCD时空分布规律,并与同期臭氧监测仪(OMI)卫星反演提供的NO_2VCD进行对比分析。结果表明,天山南北绿洲城市NO_2VCD日变化均呈"早晚高,中午低"趋势,其中最大4h(15:00—19:00)NO_2VCD为乌鲁木齐市>库尔勒市>石河子市>和田市>博乐市;移动监测数据表明,城市对流层NO_2VCD在风向稳定且具有较高风速的监测日时,下风向浓度通常高于上风向,且车流量较高的立交桥与道路交汇处容易出现高值;因天山南北绿洲城市的地形不同,气象因子的差别(尤其是风场)是导致对流层NO_2VCD浓度差异的重要原因;MAX-DOAS监测的NO_2VCD与OMI卫星反演NO_2VCD具有较好的一致性。In order to investigate the distribution characteristics of tropospheric NO 2 vertical column density(VCD)in oasis city of Xinjiang,this paper selected northern slopes of the Tianshan Mountains Urumqi,medium-sized city Shihezi,small city Bole,and southern slope medium-sized city Korla,small city Hotan as study area,and using multi axis differential optical absorption spectroscopy(MAX-DOAS)technology of fixed and mobile system to monitor the NO 2 VCD during heavy air pollution period from 2015 to 2017.The monitored data were also compared with NO 2 VCD provided by Ozone Monitoring Instrument(OMI)satellite inversion during the same period.The results showed that the diurnal changes of NO 2 VCD in these cities were“high in the morning and evening,low in the noon”,and the maximum 4 h(15:00-19:00)NO 2 VCD was followed the order of Urumqi>Korla>Shihezi>Hotan>Bole;The mobile MAX-DOAS data showed that under strong winds of constant direction,urban tropospheric NO 2 VCD was relative higher in the downwind,and the maximum value was always found at overpasses and road intersections where had high volumes of traffic.Differences in the meteorological factors and industrial structures of oasis cities were the main cause of varying NO 2 VCD;the MAX-DOAS measured NO 2 VCD and OMI observed NO 2 VCD had good agreement.

关 键 词：天山南北绿洲城市 重污染 多轴差分吸收光谱 NO2 

分 类 号：X51[环境科学与工程—环境工程]