Phenological analysis of the savanna–forest transition from 1981 to 2006 from Côte d’Ivoire to Benin with NDVI NOAA time series

European Journal of Remote Sensing

Julien Andrieu¹ 

[1] Université Côte d’Azur, CNRS, ESPACE;

关键词: NDVI;    phenology;    remote sensing;    savanna–forest transition;    TSA;    vegetation dynamics;   

DOI  :  10.1080/22797254.2017.1377051

来源: DOAJ

【 摘 要 】

To examine the kinematics of the savanna–forest transition via phenology from 1981 to 2006 and from Côte d’Ivoire to Benin, the normalized difference vegetation index has been used to describe the temporal variation of the photosynthetic activity. A synthetic index of bimodality has been computed at pixel scale before and after 1994. No class in Côte d’Ivoire shows a change from a forest bimodal character to a savanna unimodal character. On the other hand, the only unimodal class in the entire series shows a minute inflexion toward a bimodal rhythm. In Benin, one notes greater stability between the two periods. The “regreening” that was observed in Sahel can be associated with a similar, yet not strongly marked, phenomenon in the Sudanian–Guinean transition.

【 授权许可】

Unknown