Permafrost thawing-induced land subsidence and lake level drop in northern Alaska detected by ENVISAT and SARAL/Altika altimeters

Cheinway Hwang1, Chia-En Hsieh2 and Yung-Sheng Cheng2, (1)National Yang Ming Chiao Tung University, Hsinchu, Taiwan, (2)National Chiao Tung University, Hsinchu, Taiwan