ENSO Impact on the Australian vegetation
نویسندگان
چکیده
The modelling of water and energy exchanges between Soil-Vegetation and the ATmosphere (SVAT) often assimilates remotely sensed time series of Vegetation Indices (VIs). At first order, spectral combinations like the Normalized Difference Vegetation Index (NDVI) are known for their ability to witness the geographic and seasonal distribution of greenness on continental surfaces. Another usual combination is the ShortWave Vegetation Index (SWVI), which is more sensitive to the vegetation structure and water content than NDVI (Gao et al. 1996). According to recent published studies (e.g. Maki et al. 2006), the difference between NDVI and SWVI (Δ hereafter) should theoretically relate to the vegetation water stress.
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