| 2000-2014年蒙古高原植被覆盖时空变化特征及其对地表水热因子的响应 |
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| 引用本文： | 温都日娜,包玉海,银山,王永芳.2000-2014年蒙古高原植被覆盖时空变化特征及其对地表水热因子的响应[J].冰川冻土,2017(6):1345-1356. |
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| 作者姓名： | 温都日娜 包玉海 银山 王永芳 |
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| 作者单位： | 1. 内蒙古师范大学 地理科学学院,内蒙古 呼和浩特,010022;2. 东北师范大学 环境学院,吉林 长春,130024 |
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| 基金项目： | 国家自然科学基金项目，科技基础资源调查专项子课题项目，国家重点研发计划项目 |
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| 摘 要： | 利用MODIS NDVI数据、同期地表水热组合数据和植被类型数据,对2000-2014年蒙古高原生长季和三季(春、夏、秋季)植被覆盖时空演变特征及其对地表水热因子响应模式进行分析.研究表明:这15 a来,蒙古高原生长季及三季归一化植被指数NDVI均呈增加趋势,且呈显著增加趋势区域主要集中在内蒙古地区,一定程度上反映了该地区生态恢复工程的有效性.研究区植被覆盖变化与地表水分指数LSWI有密切的关系,因此证明研究区植被覆盖的增加归因于自然和人为因素的共同作用.不同类型植被NDVI均呈增加趋势,其中荒漠植被NDVI增加最明显,森林植被增加平缓,且存在季节性差异.此外,不同类型植被NDVI受水热因子影响也存在季节性差异.
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| 关 键 词： | 蒙古高原 归一化植被指数(NDVI) 地表温度(LST) 地表水分指数(LSWI) |
The spatial and temporal variation of vegetation cover in Mongolian Plateau and its response to surface hydrothermal factors from 2000 through 2014 |
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| Abstract: | In this paper, annual and seasonal variations of vegetation coverage and its response to land surface hydrothermal conditions in Mongolian Plateau during 2000-2014 were analyzed by using MODIS NDVI dataset and corresponding hydrothermal data, including land surface water index and land surface temperature. The re-sults indicated that the annual and seasonal vegetation coverages had increased during 2000-2014 in Mongolian Plateau, especially in the Inner Mongolia Region, showing the effectiveness of the ecological restoration project. The vegetation coverage in the study area has close relationship with LSWI ( land surface water index ) . It is demonstrated that the vegetation coverage is increasing due to a combination action of natural and human factors. The normalized difference vegetation index ( NDVI) of various vegetation types is increasing too, especially in desert, but NDVI of forest increasing gently. In addition, there are seasonal differences in the influence of hy-drothermal factors on NDVI of different types of vegetation. |
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| Keywords: | Mongolian Plateau normalized difference vegetation index ( NDVI ) land surface temperature ( LST) land surface water index ( LSWI) |
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