Surface velocity field for the Baltoro Glacier

Surface velocity field for the Baltoro Glacier in Pakistan based on six Envisat Advanced Synthetic Aperture Radar images taken from 2003 to 2008. The analysis of mutli-temporal data such as these allows changes in the glacier velocity pattern to be detected accurately and quickly. Inset: Centreline velocity profile; location as depicted by dashed yellow line in main image. Note the gradual increase in flow with distance from the terminus, as is common on debris-covered glaciers, and the velocity maximum at Concordia, which is associated with the confluence of the two major tributary glaciers, the Godwin Austen Glacier and the Baltoro South Glacier.