干旱区研究 ›› 2025, Vol. 42 ›› Issue (10): 1791-1801.doi: 10.13866/j.azr.2025.10.04 cstr: 32277.14.AZR.20251004

• 天气与气候 • 上一篇    下一篇

吐哈地区沙尘天气时空演变特征及气候影响因子

白松竹1(), 姚俊强2, 马依拉古丽3, 李岩瑛4(), 马幸蔚4, 杜江3   

  1. 1.哈密市气象局,新疆 哈密 839000
    2.中国气象局乌鲁木齐沙漠气象研究所 新疆 乌鲁木齐 830002
    3.吐鲁番市气象局,新疆 吐鲁番 838000
    4.武威市气象局,甘肃 武威 733000
  • 收稿日期:2025-04-02 修回日期:2025-08-19 出版日期:2025-10-15 发布日期:2025-10-22
  • 通讯作者: 李岩瑛. E-mail: lyyqxj@163.com
  • 作者简介:白松竹(1979-),女,副研级高级工程师,主要从事天气预报及研究工作. E-mail: bszxjhm@sina.com
  • 基金资助:
    上海合作组织科技伙伴计划及国际科技合作计划项目“中亚区域气候变化科学评估报告编制”(2023E01022);国家自然科学基金面上项目(41975015)

Spatiotemporal evolution characteristics of windblown sand weather and its climatic driving mechanisms in the Tuha Area

BAI Songzhu1(), YAO Junqiang2, Mairaguli 3, LI Yanying4(), MA Xingwei4, DU Jiang3   

  1. 1. Hami Meteorological Bureau, Hami 839000, Xinjiang, China
    2. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, Xinjiang, China
    3. Turpan Meteorological Bureau, Turpan 838000, Xinjiang, China
    4. Wuwei Meteorological Bureau, Wuwei 733000, Gansu, China
  • Received:2025-04-02 Revised:2025-08-19 Published:2025-10-15 Online:2025-10-22

摘要:

利用1974—2024年吐哈地区11个国家气象站地面气象观测资料和192个区域站的风向、风速观测资料,分析了该区沙尘天气的时空变化特征及其与气象要素的相关关系。结果表明:(1) 该区年沙尘天气中浮尘天气发生频率最高,沙尘暴最少,扬沙天气居中;春季是沙尘天气高发期,扬沙和沙尘暴夏季次多,冬季最少;而浮尘天气秋季次多,夏季最少。(2) 沙尘天气日数呈西多东少、盆地多山区少的分布特征;吐鲁番市托克逊和高昌区是浮尘天气高发区域,扬沙和沙尘暴主要集中在托克逊、东坎儿站和淖毛湖站,哈密市巴里坤、伊吾等山区沙尘天气很少;不同区域沙尘天气风向和风速分布也存在显著差异。(3) 近50 a沙尘天气日数整体呈减少趋势,其中浮尘天气减少速率最快,为7.1 d·(10a)-1;20世纪70年代沙尘天气最多,2013年最少,近10 a总沙尘、浮尘、扬沙日数均呈显著增多趋势;年沙尘、浮尘、扬沙日数突变年分别为1991年、1995年和1991年,沙尘暴日数突变特征不明显。(4) 沙尘日数与大风日数、平均风速呈显著正相关,与平均气温呈显著负相关,而与降水量、日照时数等无明显相关性。

关键词: 沙尘天气, 时空演变, 气候因子, 吐哈地区

Abstract:

This study uses ground meteorological observation data from 11 national meteorological stations and 192 regional stations in the Tuha Area, spanning from 1974 to 2024, to analyze the spatiotemporal variations of sand-dust weather and its correlation with meteorological factors. The results reveal the following: (1) Floating dust is the most frequently occurring sand-dust weather event in the area, followed by blowing sand; sandstorms occur least frequently. The peak period for sand-dust weather is in spring. Blowing sand and sandstorms are more common in summer and the least in winter, whereas floating dust is more frequent in autumn than in summer. (2) The distribution of sand-dust weather days shows a pattern of higher occurrence in the west compared to the east, and more prevalence in basins than in mountainous areas. High-incidence areas for floating dust include Tuokexun and Gaochang District of Turpan City. Blowing sand and sandstorms are mainly concentrated around the Tuokexun-East Kan’er Station and Naomaohu Station, whereas mountainous regions such as Barkol and Yiwu in Hami City experience very few sand-dust weather events. In addition, significant differences exist in wind direction and speed associated with sand-dust weather across different regions. (3) Over the past 50 years, the total number of sand-dust weather days has shown an overall decreasing trend, with floating dust decreasing at the fastest rate of 7.1 days per decade. The 1970s recorded the highest sand-dust weather, whereas 2013 recorded the lowest. In the past decade, the total number of days with sand-dust, floating dust, and blowing sand has significantly increased. Abrupt changes in the annual counts of sand-dust, floating dust, and blowing sand occurred in 1991, 1995, and 1991, respectively, whereas the trend for sandstorm days did not exhibit a clear abrupt change. (4) The number of sand-dust days shows a significant positive correlation with both the number of strong wind days and average wind speed, a significant negative correlation with average temperature, and no clear correlation with precipitation or sunshine duration.

Key words: sand-dust weather, temporal and spatial evolution, climatic factors, Tuha Area