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乌昌石都市圈城市空间发展对NO2浓度时空变化的影响

曹扬 李艳红

曹扬,李艳红.乌昌石都市圈城市空间发展对NO2浓度时空变化的影响[J].环境工程技术学报,2023,13(3):921-928 doi: 10.12153/j.issn.1674-991X.20220366
引用本文: 曹扬,李艳红.乌昌石都市圈城市空间发展对NO2浓度时空变化的影响[J].环境工程技术学报,2023,13(3):921-928 doi: 10.12153/j.issn.1674-991X.20220366
CAO Y,LI Y H.Effect of urban spatial development on spatial and temporal variation of NO2 concentration in Wuchangshi Metropolitan Area[J].Journal of Environmental Engineering Technology,2023,13(3):921-928 doi: 10.12153/j.issn.1674-991X.20220366
Citation: CAO Y,LI Y H.Effect of urban spatial development on spatial and temporal variation of NO2 concentration in Wuchangshi Metropolitan Area[J].Journal of Environmental Engineering Technology,2023,13(3):921-928 doi: 10.12153/j.issn.1674-991X.20220366

乌昌石都市圈城市空间发展对NO2浓度时空变化的影响

doi: 10.12153/j.issn.1674-991X.20220366
基金项目: 新疆维吾尔自治区自然科学基金面上项目(2021D01A117);国家自然科学基金项目(41761007)
详细信息
    作者简介:

    曹扬(1992—),男,硕士研究生,主要从事干旱区资源与气候研究,1303486451@qq.com

    通讯作者:

    李艳红(1977—),女,教授,博士,主要从事干旱区湖泊湿地生态恢复技术研究,lyh0704@126.com

  • 中图分类号: X511

Effect of urban spatial development on spatial and temporal variation of NO2 concentration in Wuchangshi Metropolitan Area

  • 摘要:

    为探究城市空间发展对天山北坡经济带重心乌昌石都市圈NO2污染的影响,利用多源遥感数据对乌昌石都市圈NO2排放量时空变化进行研究。结果表明:基于2006—2020年OMI遥感数据,按全疆NO2平均排放量大小进行划分后发现,新疆地区NO2低污染区为和田等小城市,较低污染区为喀什及哈密等地区,中污染区在其中西部地区,次高污染区出现在天山南坡中等城市巴音郭楞蒙古自治州中部,高污染区在乌昌石都市圈。在空间格局上,城镇用地与建设用地以乌鲁木齐市五大城区为中心,以昌吉回族自治州昌吉市、阜康市及石河子市城区为副中心不断增长。乌昌石都市圈城市化进程加快,距离城区越近NO2浓度越高,对其周围环境的污染程度越高。乌昌石都市圈2次疫情防控时,NO2浓度下降幅度最大。对新型冠状病毒感染疫情防控前后(2019—2021年)乌昌石都市圈潜在源贡献因子(PSCF)及浓度权重轨迹(CWT)进行分析,结果表明主要潜在源区为乌鲁木齐本地区域以及昌吉回族自治州西南部邻近城市。

     

  • 图  1  NO2浓度空间变化情况

    Figure  1.  Spatial variation of NO2 concentration

    图  2  土地利用变化情况

    Figure  2.  Land use change

    图  3  2019—2021年气流轨迹聚类统计分析结果

    注:图中★表示本地主要污染排放源位置,通过聚类分为6条输送轨迹,百分数表示轨迹数占总轨迹数的比例。

    Figure  3.  Clustering statistical analysis results of air flow trajectory from 2019 to 2021

    图  4  2019—2021年NO2潜在贡献源分析

    Figure  4.  Analysis of NO2 potential sources in 2019-2021

    图  5  2019—2021年NO2的浓度权重轨迹

    Figure  5.  Weight trajectory of NO2 CWT concentration from 2019 to 2021

    表  1  各阶段同期NO2浓度变化情况

    Table  1.   Changes of NO2 concentration in each stage

    地区年份1月1—
    26日
    1月27日—
    3月4日
    3月5日—
    7月16日
    7月17日—
    9月1日
    9月2日—
    12月31日
    乌鲁木齐2019 66.73 58.64 32.17 30.35 47.13
    202061.8438.1921.9615.7236.96
    202160.7546.8823.4928.4739.43
    昌吉回族
    自治州
    201933.5133.0822.9223.2927.53
    202048.2927.0317.5610.9330.50
    202134.1526.2513.4815.9222.15
    石河子201959.4743.6728.1628.8243.24
    202059.8427.2624.2323.2743.15
    202164.5548.6825.9928.9642.02
    下载: 导出CSV

    表  2  城市NO2浓度与功能区数量关系

    Table  2.   Relationship between NO2 concentration and the number of functional areas

    地区NO2平均
    浓度/
    (molec/cm2)
    功能区数量
    餐饮
    购物
    住宅科教企业
    公司
    乌鲁木齐 工业区 34 16 578 671 513 3 730
    市区 45 54 264 3835 3 110 7 419
    昌吉回族
    自治州
    工业区 28 26 10 13 73
    市区 47 2 722 164 157 253
    石河子 工业区 48 1 253 73 228 302
    市区 52 1 712 182 527 400
    下载: 导出CSV

    表  3  气象因素统计

    Table  3.   Meteorological factor statistics

    区域气象因素春季夏季秋季冬季
    乌鲁木齐主导风向西北风西北风北风北风
    平均风速/(m/s)238~128~124~8
    24 h内强降温次数10654
    昌吉回族自治州主导风向北风北风北风北风
    平均风速/(m/s)8~128~124~80~4
    24 h内强降温次数101686
    石河子主导风向北风北风西北风北风
    平均风速/(m/s)8~128~124~80~4
    24 h内强降温次数11435
    下载: 导出CSV
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