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

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

1.
中国科学院新疆生态与地理研究所，荒漠与绿洲生态国家重点实验室
2.
新疆农业大学水利与土木工程学院
3.
新疆和田地区墨玉县气象局

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
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出版历程
- 收稿日期: 2021-06-08

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

1.
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences
2.
College of Water and Civil Engineering, Xinjiang Agricultural University
3.
Moyu Meteorological Bureau, Hetian Prefecture, Xinjiang

摘要

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。
- HYSPLIT模型 /
- 沙尘天气 /
- 传输路径 /
- 气流轨迹 /
- 聚类分析 /
- 和田绿洲
Abstract:
Hetian oasis located at the south edge of Taklimakan Desert was selected as the study area, and the 36 h of the backward trajectory of air parcel at the ending point (79.72°E, 37.26°N) for 2891 dusty days in the period of 2004-2018 were simulated by using HYSPLIT backward trajectory model and NCEP-GDAS global meteorological data. The transport pathway and meteorological characteristics of air parcel in dusty days were quantitatively analyzed by using k-means clustering technique. The results showed that there was no significant variation in the annual frequency of dust storms from 2004 to 2018, and there was no obvious increase or decrease trend. Spring and summer (from March to July) were the main dusty seasons, accounting for 70.2% of the total dust weather in the whole year, with May and June being the most active periods of strong dust storms. During the dust weather, the movement height and trajectory pathway of air parcel were quite different. The trajectories of dust storms arriving at Moyu County were categorized by k-means clustering into 4 clusters, NW-W cluster, N-N cluster, NE-E cluster and E-ES cluster, which showed distinct features in terms of the air parcel origins and the entry direction to the study site, and their frequencies were 18.9%, 12.3%, 60.1% and 7.8%, respectively. Among them, air masses arriving at the study area from east to west showed the highest frequency (60.1%), and it was mainly floating dust weather. The frequency of dust from northwest to southeast was not high, but the moving speed was the fastest, and strong dust storms and sand blowing mainly came from northwest and west. The dust storms from north to south had the slowest speed (1.36 m/s), the lowest air humidity (26.4%), and the highest temperature (292.58 K). The different transport pathways of dust storms in Moyu County were quantitatively confirmed, which could provide a reference for the study of dust storms in the oasis area.
- HYSPLIT model /
- dusty weather /
- transport pathway /
- air mass trajectory /
- cluster analysis /
- Hetian Oasis

HTML全文

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

下载: 全尺寸图片幻灯片

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

下载: 全尺寸图片幻灯片

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

下载: 全尺寸图片幻灯片

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

下载: 全尺寸图片幻灯片

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

下载: 全尺寸图片幻灯片

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
沙尘暴轨迹类型	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±22.3	1.51±0.12	34.9±4.3	1 856.55±265	591.51±22
N-N簇	352（12.2%）	203（9.6%）	112（19.6%）	37（17.6%）	292.58±25.2	1.36±0.17	26.4±1.7	1 422.52±112	502.88±51
NE-E簇	1 764（61.1%）	1 468（69.5%）	258（45.2%）	38（18.1%）	291.27±22.7	1.42±0.17	29.1±1.7	1 765.79±157	567.17±52
E-ES簇	226（7.8%）	151（7.4%）	69（12.1%）	6（2.9%）	288.76±33.4	1.36±0.15	27.7±2.8	1 109.19±76	393.57±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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