Each global image in this animation is a mosaic made with 1 month of MODIS observations.

Observe the green-up and dying-back of vegetation in temperate regions such as North America and Europe. Can you see the advancing and retreating Northern Hemisphere snow cover? Dry and wet seasons in the tropics can also be spotted.

Scientists use this type of time series to monitor the seasonal and inter-annual evolution of green vegetation worldwide.

Question: Why are time series so interesting ?