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中国沙漠 ›› 2024, Vol. 44 ›› Issue (2): 57-65.DOI: 10.7522/j.issn.1000-694X.2023.00104

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青藏高原沙尘的外源贡献

曹佳慧(), 陈思宇(), 张潮, 连露露, 赵丹, 杜世康   

  1. 兰州大学 大气科学学院/半干旱气候变化教育部重点实验室,甘肃 兰州 730000
  • 收稿日期:2023-06-16 修回日期:2023-07-13 出版日期:2024-03-20 发布日期:2024-03-19
  • 通讯作者: 陈思宇
  • 作者简介:陈思宇(E-mail: chensiyu@lzu.edu.cn
    曹佳慧(1995—),女,吉林长春人,硕士研究生,主要从事气溶胶数值模拟研究。E-mail: caojh20@lzu.edu.cn
  • 基金资助:
    国家自然科学基金项目(U2242209)

External contribution of the Tibetan Plateau dust

Jiahui Cao(), Siyu Chen(), Chao Zhang, Lulu Lian, Dan Zhao, Shikang Du   

  1. College of Atmospheric Sciences / Ministry of Education Key Laboratory for Semi-Arid Climate Change,Lanzhou University,Lanzhou 730000,China
  • Received:2023-06-16 Revised:2023-07-13 Online:2024-03-20 Published:2024-03-19
  • Contact: Siyu Chen

摘要:

青藏高原沙尘的来源是高原环境与气候领域的重要问题。以往研究发现,高原沙尘来自局地释放和外源沙漠输送,但外源沙漠对于高原的沙尘季节贡献还存在定量分析和源区感热分析的不足。采用WRF-Chem模式(Weather Research and Forecasting coupled with Chemistry)对青藏高原以及周边地区的沙尘季节分布与传输进行研究。结果表明:高原外部沙尘源区的沙尘柱浓度与感热呈现一致的季节变化趋势。东亚沙源(古尔班通古特沙漠、塔克拉玛干沙漠、戈壁沙漠)与南亚沙源(塔尔沙漠)释放的沙尘占青藏高原沙尘气溶胶总量的80%以上。塔克拉玛干沙漠对于青藏高原沙尘的贡献最大,在4个季节中均可达到40%以上。塔尔沙漠在春夏季对高原沙尘的贡献较为显著(25%左右)。

关键词: 青藏高原, 沙尘传输, WRF-Chem, 外源贡献

Abstract:

The source of dust over the Tibetan Plateau is an important issue in the field of the plateau environment and climate. Previous studies have found that dust over the plateau comes from local release and transport by external deserts, but there are still deficiencies in quantitative analysis and sensible heat analysis of external deserts and seasonal contribution of dust over the plateau. In this paper, WRF-Chem (Weather Research and Forecasting coupled with Chemistry) is employed to study the seasonal distribution and transport of dust over the Tibetan Plateau and surrounding areas. The results show that the dust column loading seasonal variation trend is consistent with sensible heat in the dust source areas. Dust released by East Asian deserts (Gurbantunggut Desert, Taklimakan Desert, Gobi Desert) and South Asian desert (Thar Desert) accounts for more than 80% of total dust aerosol over the Tibetan Plateau. Dust released by The Taklimakan Desert contributes the most to the dust over the Tibetan Plateau in each season, at 40%. The contribution of Thar desert to plateau dust in spring and summer is relatively significant (about 25%).

Key words: Tibetan Plateau, dust transport, WRF-Chem, external contribution

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