| 蒙古高原NDVI的空间格局及分异 |
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| 引用本文： | 张雪艳,胡云锋,庄大方,齐永清,马欣.蒙古高原NDVI的空间格局及分异[J].地理学报(英文版),2009,19(4):403-415. |
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| 作者姓名： | 张雪艳 胡云锋 庄大方 齐永清 马欣 |
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| 作者单位： | [1]Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]Department of Urban Planning ＆ Environment, Royal Institute of Technology, Stockholm 10044, Sweden |
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| 基金项目： | 国家自然科学基金，National Science and Technology Support Project，National Key Project of Scientific and Technical Supporting Programs |
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| 摘 要： |
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| 关 键 词： | NDVI 沙漠 区域 地理学 |
| 收稿时间： | 29 March 2009 |
NDVI spatial pattern and its differentiation on the Mongolian Plateau |
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| Xueyan Zhang,Yunfeng Hu,Dafang Zhuang,Yongqing Qi,Xin Ma.NDVI spatial pattern and its differentiation on the Mongolian Plateau[J].Journal of Geographical Sciences,2009,19(4):403-415. |
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| Authors: | Xueyan Zhang Yunfeng Hu Dafang Zhuang Yongqing Qi Xin Ma |
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| Institution: | (1) Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China;(2) The Lanzhou Branch of the National Science Library, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China |
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| Abstract: | GIMMS NDVI database and geo-statistics were used to depict the spatial distribu-tion and temporal stability of NDVI on the Mongolian Plateau. The results demonstrated that: (1) Regions of interest with high NDVI indices were distributed primarily in forested moun-tainous regions of the east and the north, areas with low NDVI indices were primarily distrib-uted in the Gobi desert regions of the west and the southwest, and areas with moderate NDVI values were mainly distributed in a middle steppe strap from northwest to southeast. (2) The maximum NDVI values maintained for the past 22 years showed little variation. The average NDVI variance coefficient for the 22-year period was 15.2%. (3) NDVI distribution and vege-tation cover showed spatial autocorrelations on a global scale. NDVI patterns from the vegetation cover also demonstrated anisotropy; a higher positive spatial correlation was in-dicated in a NW-SE direction, which suggested that vegetation cover in a NW-SE direction maintained increased integrity, and vegetation assemblage was mainly distributed in the same specific direction. (4) The NDVl spatial distribution was mainly controlled by structural factors, 88.7% of the total spatial variation was influenced by structural and 11.3% by random factors. And the global autocorrelation distance was 1178 km, and the average vegetation patch length (NW-SE) to width (NE-SW) ratio was approximately 2.4:1.0. |
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| Keywords: | GIMMS NDVI spatial pattern spatial differentiation spatial statistics Mongolian Plateau |
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