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基于轨迹模型的和田绿洲沙尘移动轨迹及气象特征分析

艾沙江·艾力 徐至远 徐海量 木合塔尔·吾提库尔 麦麦提艾力·麦麦提敏

艾沙江·艾力,徐至远,徐海量,等.基于轨迹模型的和田绿洲沙尘移动轨迹及气象特征分析[J].环境工程技术学报,2022,12(4):1007-1014 doi: 10.12153/j.issn.1674-991X.20210226
引用本文: 艾沙江·艾力,徐至远,徐海量,等.基于轨迹模型的和田绿洲沙尘移动轨迹及气象特征分析[J].环境工程技术学报,2022,12(4):1007-1014 doi: 10.12153/j.issn.1674-991X.20210226
AISHAJIANG A L,XU Z Y,XU H L,et al.Analysis of the origin and meteorological characteristics of dust-storm in Hetian Oasis based on a trajectory model approach[J].Journal of Environmental Engineering Technology,2022,12(4):1007-1014 doi: 10.12153/j.issn.1674-991X.20210226
Citation: AISHAJIANG A L,XU Z Y,XU H L,et al.Analysis of the origin and meteorological characteristics of dust-storm in Hetian Oasis based on a trajectory model approach[J].Journal of Environmental Engineering Technology,2022,12(4):1007-1014 doi: 10.12153/j.issn.1674-991X.20210226

基于轨迹模型的和田绿洲沙尘移动轨迹及气象特征分析

doi: 10.12153/j.issn.1674-991X.20210226
基金项目: 中国科学院“西部之光”项目(Y734341)
详细信息
    作者简介:

    艾沙江·艾力(1971—),男,副研究员,博士,研究方向为环境工程和恢复生态学,aishajiang@ms.xjb.ac.cn

    通讯作者:

    徐海量(1971—),男,研究员,研究方向为恢复生态学,xuhl@ms.xjb.ac.cn

  • 中图分类号: X513

Analysis of the origin and meteorological characteristics of dust-storm in Hetian Oasis based on a trajectory model approach

  • 摘要:

    以塔克拉玛干沙漠南缘的和田绿洲为研究区域,使用HYSPLIT后向轨迹模型和NCEP的GDAS全球气象要素数据,将和田绿洲西北部的墨玉县城作为模拟受点(79.72°E,37.26°N),对2004—2018年墨玉县发生的2 891次沙尘天气进行36 h的后向轨迹模拟,并通过k-means聚类分析法,定量分析沙尘天气期间气流的传输路径及气象特征。结果表明:2004—2018年,研究区沙尘天气的发生频率变化幅度不大,没有明显的增减趋势;年内沙尘天气主要集中在春季和夏季(3—7月),占全年沙尘天气总数的70.23%,5、6月是强沙尘暴最活跃期。在沙尘天气期间气流的移动高度和轨迹相差较大,按照气流的起源地和到达墨玉县的方向将沙尘暴分为NW-W簇、N-N簇、NE-E簇和E-ES簇4簇轨迹类型,其发生天数占比分别为18.9%、12.3%、60.1%和7.8%。由东向西的沙尘天气发生天数占比最高(60.1%),但主要以浮尘天气为主;由西北向东南方向的沙尘发生频率不高,但移动速度最快,强沙尘暴和扬沙主要来自西北和西部方向;由北向南的沙尘暴速度最慢(1.36 m/s),空气湿度最低(26.4%),但气温最高(292.58 K)。定量印证了墨玉县沙尘暴不同传输路径,可为绿洲区沙尘暴研究提供参考。

     

  • 图  1  墨玉县各类沙尘天气发生天数

    Figure  1.  Occurrence frequency of various dust weathers in Moyu County

    图  2  墨玉县各类沙尘天气发生天数月变化

    Figure  2.  Monthly variation of occurrence frequency of various dust weathers in Moyu County

    图  3  沙尘天气月发生天数与气象要素之间的关系

    Figure  3.  Relationships between dust storm monthly occurrence frequency and meteorological factors

    图  4  墨玉县沙尘暴36 h后向轨迹

    注:审图号为GS(2021)6026。

    Figure  4.  36 h of backward trajectory of dust storm in Moyu County

    图  5  墨玉县沙尘暴不同轨迹的发生天数

    注:审图号为GS(2021)6026。

    Figure  5.  Occurrence frequency of different trajectories of dust storm in Moyu County

    表  1  沙尘暴期间到达墨玉县的各簇气团的主要移动路径、沙尘发生天数及气象特征

    Table  1.   Pathway, frequency and meteorological characteristics of each cluster of air mass reaching Moyu County during dust storm period

    沙尘暴
    轨迹类型
    沙尘天气发生天数/d气象特征
    总计浮尘扬沙强沙尘暴平均气温/
    K
    平均风速/
    (m/s)
    平均相对
    湿度/%
    大气混合
    层厚度/m
    太阳辐射通
    量/(W/m2)
    NW-W簇549(18.9%)288(13.4%)132(23.1%)129(61.4%)291.33±22.31.51±0.1234.9±4.31 856.55±265591.51±22
    N-N簇352(12.2%)203(9.6%)112(19.6%)37(17.6%)292.58±25.21.36±0.1726.4±1.71 422.52±112502.88±51
    NE-E簇1 764(61.1%)1 468(69.5%)258(45.2%)38(18.1%)291.27±22.71.42±0.1729.1±1.71 765.79±157567.17±52
    E-ES簇226(7.8%)151(7.4%)69(12.1%)6(2.9%)288.76±33.41.36±0.1527.7±2.81 109.19±76393.57±41
    注:括号内数字为沙尘天气发生天数占比。
    下载: 导出CSV
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