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Ecological drought monitoring of Inner Mongolia vegetation growing season based on kernel temperature vegetation drought index(kTVDI)
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- Author:
- No author available
- Journal Title:
- Chinese Journal of Applied Ecology
- Issue:
- 11
- DOI:
- 10.13287/j.1001-9332.202311.024
- Key Word:
- 核温度植被干旱指数;生态干旱;MODIS;内蒙古;kernel temperature vegetation drought index(kTVDI);ecological drought;MODIS;Inner Mongolia
Abstract： 生态干旱监测对区域生态系统水资源状况评估和保护十分重要.本研究以内蒙古为研究区,使用核归一化植被指数(kNDVI)改进温度植被干旱指数(TVDI),构建了一种新的生态干旱指数——核温度植被干旱指数(kTVDI),基于此,利用分段线性回归模型、Sen趋势分析(Theil-Sen median)、曼-肯德尔检验(Mann-Kendall)和赫斯特指数(Hurst)等方法分析2000-2022年间内蒙古生态干旱的时空分布特征和未来变化趋势.结果表明:相较于TVDI,kTVDI的生态干旱监测能力更强;2000-2022年间,内蒙古植被生长季kTVDI呈下降趋势,但变化不显著,在2016年发生突变,突变后的湿润趋势更为明显;研究期间,内蒙古23.6％地区的生态干旱呈加剧趋势,46.5％地区的生态干旱缓解;未来,生态干旱在内蒙古东部地区存在加剧、在中西部地区存在缓解的可能.
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