Table 17.1 Summary of approaches for satellite-derived phenology
Approach
Reference
Advantage
Disadvantage
Vegetation index threshold
Lloyd (1990);
Fischer (1994);
Markon et al. (1995)
Easy to apply
Not applicable across land covers
Moving average of smoothed NDVI
Reed et al. (1994)
Independent of land cover
types
Hard to determine the moving average time
interval
Normalized NDVI ratio
White et al. (1997)
Ecologically meaningful
Dependent of land covers
Derivative of NDVI
Moulin et al. (1997)
Independent of land cover
Sensitive to the weight of the derivative term
Linear segments of NDVI time series
Duchemin et al. (1999)
Easy to apply
Sensitive to a change in the rate of NDVI
variation
Curvature-change rate for vegetation
indices
Zhang et al. (2003)
For multiple growth cycle
Hard to determine the single growth and
senescence periods
Independent of land covers
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