Assessment of Desertification Using Time Series Analysis of Hyper-temporal Vegetation Indicator in Inner Mongolia
YIN He1, LI Zhengguo1,2, WANG Yanglin1, CAI Fu3
1. College of Urban & Environmental Sciences, Peking University, Beijing 100871, China;
2. Key Laboratory of Resources Remote Sensing & Digital Agriculture, Ministry of Agriculture, Beijing 100081, China;
3. Institute of Atmospheric Environment, CMA, Shenyang 110016, China
Abstract：Desertification is one of the serious threats to the environment in arid and semi-arid northern China. In order to understand inter-annual vegetation dynamics, vegetation indicators have been widely used in desertification assessment. In this study, rain use efficiency (RUE) derived from hyper-temporal remote sensing images has been used for desertification assessment. Based on time-series analysis, this study focused on how the desertification developed in Inner Mongolia and how the desertification reversed in the extremely arid environment. Results showed that during the past 11 years, there was no significant desertification development in Inner Mongolia. Parts of area showed a significant increase trend of RUE, especially in the eastern part of Ordos Plateau and southern Daqing Mountain, as well as the region from the Greater Hinggan Mountains to northern Yanshan Mountains. It is indicated that the ecological conditions in these areas have tended to be much better than before. The reason may be that the vegetation protection policies adopted in northern China have exerted a positive effect on the local environment. The results also showed that there was a significant relationship between rainfall and vegetation restoration, areas with more precipitation tend to be more easily restored, especially in the areas with more 300 mm precipitation. In addition, the research on desertification reversion showed that the desert edge region in western Inner Mongolia have changed intensively, and desertification reverse assessment needs to be further examined.
殷贺, 李正国, 王仰麟, 蔡福. 基于时间序列植被特征的内蒙古荒漠化评价[J]. 地理学报, 2011, 66(5): 653-661.
YIN He, LI Zhengguo, WANG Yanglin, CAI Fu. Assessment of Desertification Using Time Series Analysis of Hyper-temporal Vegetation Indicator in Inner Mongolia. Acta Geographica Sinica, 2011, 66(5): 653-661.
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2011, Vol. 66 
