新疆天山山区植被变化对气象干旱的响应
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吴秀兰(1988-),女,高级工程师,主要从事气象灾害相关研究. E-mail: wuxiulanxj@163.com |
收稿日期: 2024-09-05
修回日期: 2024-12-19
网络出版日期: 2026-03-11
基金资助
新疆维吾尔自治区自然科学基金项目(2022D01B181)
中国气象局创新发展专项(CXFZ2025Q023)
新疆气象局创新项目(MS202205)
Response of vegetation changes to meteorological drought in Tianshan Mountains, Xinjiang
Received date: 2024-09-05
Revised date: 2024-12-19
Online published: 2026-03-11
吴秀兰 , 程贺前 , 佟欣怡 , 张旭 . 新疆天山山区植被变化对气象干旱的响应[J]. 干旱区地理, 2025 , 48(6) : 985 -994 . DOI: 10.12118/j.issn.1000-6060.2024.536
Considering the global climate change trends, understanding the impact of drought on vegetation is crucial for ecological protection and sustainable development. This study analyzes the spatiotemporal variation of vegetation and its response to meteorological drought within the Tianshan Mountains in Xinjiang, China during the growing season (April-October) for the period of 2001—2023. Using the meteorological drought composite index (MCI) and normalized difference vegetation index (NDVI), we examine the trends in vegetation dynamics and drought conditions. The results indicate the following. (1) The NDVI values in Tianshan Mountains exhibited a slow increasing trend overall; however, a decline was observed since 2019. (2) The MCI values fluctuated but generally exhibited a slow decreasing trend, with a significant intensification of drought conditions in Xinjiang’s Tianshan Mountains region since 2020, particularly in summer, when MCI values dropped sharply. (3) A moderate positive correlation between MCI and NDVI suggested that meteorological drought significantly affected vegetation growth. Vegetation coverage exhibited notable seasonal and spatial heterogeneity, while drought severity followed a gradient—mildest in the west, intensifying in the central region, and most severe in the east. (4) The vegetation response to meteorological drought varied across different regions, with the most pronounced impact observed in the Wuqia County in the southwest. The results provide a scientific foundation for understanding climate change in Tianshan Mountains, assessing ecological responses to meteorological drought, and formulating effective drought mitigation strategies.
表1 MCI等级划分标准Tab. 1 Drought classification standard of MCI |
| 等级 | 类型 | MCI |
|---|---|---|
| 1 | 无旱 | -0.5<MCI |
| 2 | 轻旱 | -1.0<MCI≤-0.5 |
| 3 | 中旱 | -1.5<MCI≤-1.0 |
| 4 | 重旱 | -2.0<MCI≤-1.5 |
| 5 | 特旱 | MCI≤-2.0 |
注:MCI为气象干旱综合指数。下同。 |
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