Test, Use and Help to Improve Satellite Technology (remote sensing) to Monitor Changes in Glaciers.

Somebody has to be the expert. These scientists take highly accurate measurements on the ground and use this information to calibrate sensors that are placed in planes or orbit the earth on satellites. They then use the information to develop maps and models to estimate future changes.	© M. Demuth
Use ice cores and other evidence to investigate the past and compare this with the present Glaciology at the Geological Survey of Canada