Environment Counts | Retreat of major glacier in northeast Greenland has accelerated since 2003 :
ZachariÃ¦ IsstrÃ¸m (ZI) is a major glacier in northeast Greenland which holds enough water to raise sea level by half a meter. Research has shown that it entered a phase of accelerated retreat in fall 2012. Its ice velocity has tripled. Repeat measurements of ice thickness (Â±10 m precision) and surface elevation (Â±10 cm precision) using radar and LiDAR data from 1995 to 2014 provide precise information about ice thickness change during the retreat of ZI.
The observations show that ZI was in a state of mass balance until 2003 and is now losing mass at about 5 Gt/yr. Fast retreat of ZachariÃ¦ IsstrÃ¸m, northeast Greenland, J. Mouginot et al. Published Online November 12 2015 Science DOI: 10.1126/science.aac7111