Paris, Dec 3 : Observations by the European Space Agency’s (ESA’s) ERS and Envisat satellites have revealed that the Arctic is undergoing rapid transformation due to climate change, pollution and human activity.
From their unique positions in space, Earth-observing satellites provide effective means of continuously monitoring these regions.
The Advanced Synthetic Aperture Radar (ASAR) sensor aboard Envisat is especially suitable for monitoring the Arctic because it can acquire images through clouds and darkness – conditions often found there.
In 2007, ASAR data showed that the Arctic area covered by sea ice had shrunk to its lowest level since satellites began monitoring the area nearly 30 years ago.