Monthly Archives: August 2012

CryoSat-2 reveals 50% higher Arctic summer sea ice loss

CryoSat-2 was launched by the European Space Agency in April 2010. It is the first satellite that specifically studies sea-ice thickness; it’s orbit gives extensive coverage of the Arctic Sea and it’s radar penetrates through cloud. Preliminary results from the CryoSat-2 mission show that 900 cubic kilometres of Arctic summer sea-ice has been lost in […]

Arctic geologic methane seeps discovered

Scientists have found that retreating glaciers and melting permafrost in Alaska are releasing up to 70% more methane than previously thought. The scientists documented the release of 14C-depleted methane from gas seeps along the boundaries of permafrost thaw and receding glaciers in Alaska and Greenland. These regions are rich in natural gas, stored in sediment […]

Greenland ice loss events

Danish scientists have found that two independent dynamic ice loss events took place on the northwestern Greenland Ice Sheet margin: from 1985 to 1993 and 2005 to 2010. These events were separated by limited mass changes. The team used aerial photographs to produce digital elevation models that extended the time record of recent observed marginal […]