ANALYSIS OF GLACIER MASS BALANCE AND RHEOLOGY AT KEKESAYI GLACIER USING HEXAGON KH-9, ALOS-PRISM AND SAR DATA

摘要

Scanned stereoscopic spying photography of a Hexagon KH-9 mission in 1973 as well as high resolution stereo imagery of ALOS-PRISM from 2009 was used to generate multi-temporal Digital Terrain Models for the estimation of glacier thickness changes of Kekesayi glacier situated at the Mustag Ata massif at the northwestern end of the Tibetan Plateau. Glacier surface velocities were estimated by amplitude tracking techniques based on a TerraSAR-X data pair acquired in 2011. Preliminary results show ice thickness loss for the ablation area of this glacier of about -20 meters for the time period between 1973 and 2009. Surface velocities are reaching up to 15-25 cm per day at the upper part of the glacier in 2011, lowering significantly down in direction to the glacier tongue.