Temporal trajectories and trend from time-series image products

Time series of image products can be used to derive a time series representing every location or an average of a vegetation community. Such series can be analysed to determine long term trend and seasonal and inter-annual variation in vegetation structure and condition. A Mann-Kendall Significance Test can be used to analyse whether a change in trend was existed over the specified period with required level of confidence.

Figures showing (a) sixteen days composite MODIS NDVI time series 2001-2007 (b) NDVI time series, its trend and seasonal component representing a pixel in Eucalyptus woodland forest (c) change in NDVI trend over the time period in Barakula state forest area, Queensland derived from MODIS NDVI time series by a Mann-Kendall Significance Test (p=0.05).

time series examples

Reference

Santosh Prasad Bhandari, Stuart Phinn and Tony Gill (in preparation): Monitoring temporal trajectories and trend of foliage projective cover (FPC) in forest communities using Landsat image time series in Queensland