Climate indicators suggest a warming of the Earth.Since vegetation elicits seasonal dynamics and annual changes

the monitoring of vegetation change is an important activity to study global climatic change.The daily temporal resolution and global coverage of some satellite sensors make it possible to monitor vegetation at different spatial and temporal scales globally.The pre-processing of remote sensing（RS） data affects monitoring results directly

so a lot of international organizations perform global satellite data acquisition to receive

process

and create data sets

which strongly supports this work.Indications exist as well that an increase in global and specifically boreal vegetation activity occurs.The middle and high latitude region of the Northern Hemisphere show a widely increasing vegetation activity while arid and semi-arid regions elicit a decrease in vegetation photosynthesis in the Southern Hemisphere.It is suggested that precipitation and temperature are the primary drivers for inter-annual vegetation changes.Vegetation cover changes are also highly related to ecosystems susceptible to global climate change.