Ma Nan,Bai Tao,Cai Zhaozhao.Vegetation Cover Change and Its Response to Climate and Surface Factors in Xinjiang Based on Different Vegetation Types[J].Research of Soil and Water Conservation,2024,31(01):385-394.[doi:10.13869/j.cnki.rswc.2024.01.031]
2000—2021年新疆植被覆盖度变化及驱动力
- Title:
- Vegetation Cover Change and Its Response to Climate and Surface Factors in Xinjiang Based on Different Vegetation Types
- 文章编号:
- 1005-3409(2024)01-0385-10
- Keywords:
- vegetation type; NDVI; change of trend; temperature; precipitation; soil moisture; runoff
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- [目的]探讨2000—2021年新疆植被覆盖变化及其驱动力的分析,为新疆地区环境监测提供理论依据。[方法]借助GEE平台获取由NASA提供的NDVI数据,利用趋势分析、Hurst指数法对新疆地区2000—2021年植被覆盖变化进行动态分析,结合气象等数据,采用Mann-Kendall、偏相关分析法等对植被覆盖变化与气候、地表因素的响应进行分析。[结果](1)2000—2021年新疆地区NDVI年际变化总体以0.001 4/a的速率波动式增长; 年内变化总体呈倒U型,草甸植被的NDVI月均值波动最大。(2)2000—2021年新疆地区NDVI年均值77.9%在0～0.3波动,在空间分布表现为北部和西北部高,南部和东南部低。(3)2000—2021年新疆地区总体slope值在-0.036～0.052波动,主要变化趋势为基本不变和轻微改善,结合Hurst指数,新疆植被主要未来趋势变化为改善到退化。(4)22年间新疆地区的气温总体呈上升趋势,降水、土壤湿度和径流总体呈下降趋势。NDVI年均值与气温、降水、土壤湿度和径流呈显著负相关性的像元数占比均大于正相关性的像元数占比,且存在明显的空间地域特征。[结论]新疆植被覆盖变化总体呈上升趋势,但未来趋势不容乐观,需要重点关注新疆地区的环境监测等保护措施。
- Abstract:
- [Objective] The aims of this study are to explore the change of vegetation cover and its driving forces in Xinjiang from 2000 to 2021, and provide a theoretical basis for environmental monitoring in Xinjiang. [Methods] GEE platform was used to obtain NDVI data provided by NASA. Trend analysis and Hurst index method were used to carry out dynamic analysis of vegetation cover change in Xinjiang from 2000 to 2021. Based on meteorological data, Mann-Kendall and partial correlation analysis were used to analyze the response of vegetation cover change to climate and surface factors. [Results](1)The interannual variation of NDVI in Xinjiang increased at a rate of 0.001 4/a from 2000 to 2021. The annual variation showed an inverted ‘U' shape, and the monthly NDVI of meadow vegetation fluctuated the most.(2)The annual average of NDVI in Xinjiang from 2000 to 2021 fluctuated between 0 and 0.3 with 77.9%, which was higher in the north and northwest, and lower in the south and southeast.(3)From 2000 to 2021, the overall slope value in Xinjiang fluctuated between -0.036 and 0.052, with the main change trend being basically unchanged and slightly improved. According to Hurst index, the main future trend change of vegetation in Xinjiang was from improvement to degradation.(4)Air temperature in Xinjiang showed an increasing trend, while precipitation, soil moisture and runoff showed a decreasing trend during 22 years. The pixel proportion of the annual mean of NDVI in negative correlation with air temperature, precipitation, soil moisture and runoff was greater than that in positive correlation, and there were obvious spatial and regional characteristics. [Conclusion] The vegetation cover change in Xinjiang is on the rise, but the future trend is not optimistic, and it is necessary to pay attention to environmental monitoring and other protection measures in Xinjiang.
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备注/Memo
收稿日期:2022-11-25 修回日期:2022-12-21
资助项目:新疆维吾尔自治区自然科学基金面上项目(2022D01A81); 自治区高校基本科研业务费科研项目(XJEDU2022J009); 新疆农业大学研究生科研创新资助项目(XJAUGRI2022032)
第一作者:马楠(1994—),女,新疆昌吉人,硕士研究生,主要从事农业信息化研究。E-mail:1457883572@qq.com
通信作者:白涛(1979—),男,甘肃榆中人,硕士,副教授.主要从事农业大数据、数据挖掘研究。E-mail:bt@xjau.edu.cn