Comparison of AVHRR NDVI and MODIS NDVI Data Products Based on Association and Trend Analysis
In view of the divergences and regional adaptability between different data products of AVHRR NDVI and MODIS NDVI datasets, the NDVI Collection 5(C5) and Collection 6(C6) products of MODIS Terra/Aqua and the GIMMS NDVI3g products in AVHRR NDVI from 2003 to 2013 were used for comparison and analysis in typical regions of HanJiang River Basin. The consistency of the data in the seasonal fluctuation was evaluated by the association index(IOAs). The Mann Kendall test was used to analyze the long-term trend of different data products. The results show that the correlation between different versions of the same satellite is relatively high in seasonal changes. In the inter-annual changes, GIMMS products can only detect partial NDVI trends which MODIS products can detect. In the area where the surface coverage is relatively heterogeneous, the detection rate of GIMMS products is low. NDVI C5 product of MODIS Terra was affected by sensor degradation, showing a relatively high reduction trend.
NETL
NSTL
万方数据
维普
