Understanding the Relationship Between Vegetation Indices and Climate Variability in Florida.

Drought is one of the biggest problems around the world, drought marked depletion of surface water causing very low stream flow and drying of lakes, rivers and reservoirs. This ultimately ends up with agricultural drought with inadequate soil moisture resulting in acute crop stress and fall in agricultural productivity. There has been many ways to monitoring drought, traditionally it is based on weather station observation, however weather stations had a problem on continuous spatial coverage. On order to fix this problem one solution could be satellite land observation data that has the possibility of monitoring the changes on land surface process. This study links the dynamics of enhanced vegetation index and normalized difference vegetation index south of Florida to two climate indexes North Atlantic Oscillation and El Niño-Southern Oscillation. Comparison of monthly vegetation phenology with climate indexes within the same basins over a 14-year period (2000–2014). Seasonal evolution connected with the temporal variation on El Niño-Southern Oscillation and monthly enhanced vegetation index. Convergent cross-mapping of related time series indicated bi-directional causality between variables. Comparisons monthly and vegetation index provided weaker correlations on the same lag but show better correlation on different lags.