Huang Yan,Song Haiqing,Hu Qi,et al.Spatial-temporal Dynamics of NDVI and Its Response to Hydrothermal Conditions in Inner Mongolia from 2000 to 2020[J].Research of Soil and Water Conservation,2024,31(04):197-204,213.[doi:10.13869/j.cnki.rswc.2024.04.006]
2000—2020年内蒙古NDVI时空动态及其对水热条件的响应
- Title:
- Spatial-temporal Dynamics of NDVI and Its Response to Hydrothermal Conditions in Inner Mongolia from 2000 to 2020
- 文章编号:
- 1005-3409(2024)04-0197-08
- 分类号:
- P49; P463.22
- 文献标志码:
- A
- 摘要:
- [目的]了解植被生态现状,剖析植被变化影响因素,为区域生态环境治理和规划提供科学依据。[方法]基于MOD13A3 NDVI数据和气象数据,采用Sen趋势分析、M-K检验、Hurst指数、相关系数等方法研究了内蒙古地区NDVI时空变化及其对水热条件的响应。[结果]内蒙古NDVI显著增长(p<0.01),空间分布呈东高西低的特征,大部分地区NDVI以增加趋势为主,耕地增长率最大且呈增加趋势面积占比最大。研究期内NDVI变化相对稳定,林地的稳定性最好。未来内蒙古NDVI变化以反持续性为主,反持续性和持续性面积占比分别为76.51%,23.49%。NDVI与气温呈负相关的区域占78.25%,其中极显著和显著负相关的区域占19.92%; 与降水、土壤湿度呈正相关的区域占93.16%,93.53%,其中极显著和显著正相关的区域分别占51.37%,55.85%。[结论]内蒙古地区植被生态整体趋于改善,未来植被生态可能退化,土壤湿度是影响内蒙古植被生长的主导因子。
- Abstract:
- [Objective]The aims of this study are to understand the vegetation ecological status and dissect the factors affecting vegetation change. [Methods]Based on the MOD13A3 NDVI data and meteorological data, the spatiotemporal variation of NDVI and its response to hydrothermal conditions were analyzed by using the Theil-Sen median trend analysis, Mann-Kendall test, Hurst index and correlation analysis in order to provide a scientific basis for ecological conservation and rational resource allocation in this region. [Results]During the study period, NDVI in Inner Mongolia increased significantly(p<0.01), and its spatial distribution was higher in the east and lower in the west. In most regions, NDVI showed an increasing trend. The growth rate of cultivated land was the largest and the proportion of cultivated land area with increasing trend was also the largest. The change of NDVI was relatively stable with low average coefficient variation, and the stability of forestland was the best. In the future, the change trend of NDVI in Inner Mongolia will be dominated by reverse sustainability, and the proportion of reverse sustainability and sustainability area will be 76.51% and 23.49%. The areas with negative correlation between NDVI and temperature accounted for 78.25% of the regions, and the areas with extremely significant and significant negative correlation between NDVI and temperature accounted for 19.92% of the regions. The areas with positive correlation between NDVI and precipitation and soil moisture accounted for 93.16% and 93.53%, and the areas with extremely significant and significant positive correlation between NDVI and precipitation and soil moisture accounted for 51.37% and 55.85%, respectively. [Conclusion]The overall vegetation ecology in Inner Mongolia showed a tendency towards improvement during the study period, and the vegetation ecology may deteriorate in the future. Soil moisture was the major effective factor on vegetation growth in Inner Mongolia.
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备注/Memo
收稿日期:2023-07-31 修回日期:2023-09-04
资助项目:国家重点研发计划重大自然灾害监测预警与防范专项(2018YFC1506606); 内蒙古自治区自然科学基金(2023QN05021); 内蒙古自治区科技计划项目(2021GG0415)
第一作者:皇彦(1989—),女,内蒙古乌兰察布人,硕士,工程师,主要从事生态遥感监测研究。E-mail:yan304@163.com
通信作者:宋海清(1988—),男,山东临沂人,博士,高级工程师,主要从事资料同化与数值模拟研究。E-mail:haiqingsong@emails.imau.edu.cn