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Risk Assessment on Food Crops Supply-Demand Balance under Climate Change in China
ZHOU Qiaofu,DAI Erfu,WU Shaohong,PAN Tao,CHEN Xiwei
  
Recurrence Quantification Analysis for Geographical Differences of the Coupling Relationship between NDVI and Climatic Factors
LI Shuangcheng,LIU Fengyuan,DAI Erfu,WU Shaohong
Acta Scientiarum Naturalium Universitatis Pekinensis   
Abstract714)            Save
Recurrence quantification analysis (RQA) and cross recurrence plot (CRP) are used to analyze the relationship between the normalized difference vegetation index (NDVI) and climatic factors in the Southwest and Southeast Monsoon Regions in Yunnan longitudinal range-gorge region (LRGR). Results show that in the Southwest Monsoon Region the NDVI series has a higher certainty than that in the Southeast Monsoon Region. The coupling relationships of NDVI series in the two regions are between a completely random series and a deterministic series with noise. The two NDVI series have low synchronization in general, especially in the period 1987?1989 and 1991?1993. The NDVI series of the Southwest Monsoon Region lags behind that of the Southeast Monsoon Region. According to the CRP indices, the similarity, persistence time and stability of the coupling relationship between NDVI and precipitation series in the Southwest Monsoon Region are better than that of the Southeast Monsoon Region. Both the NDVI series and temperature series have similar trends. However, the difference of the CRP indices between the two regions is smaller. It is suggested that the interaction pattern of NDVI and temperatures has a smaller difference between the two regions.
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