Devik Glacier

Devik Glacier is a prominent glacier located in the remote, ice-covered regions of East Antarctica. It flows generally northward, contributing to the complex glacial systems that drain into the Southern Ocean. The glacier is situated within a region of significant scientific interest due to its dynamics and response to climate change. Its study provides valuable insights into the broader cryosphere and Antarctic ice sheet stability.

Geography and location

Devik Glacier is situated on the Princess Elizabeth Land coast of East Antarctica, near the broader Ingrid Christensen Coast. It flows into the Southern Ocean, specifically into a bay adjacent to the Publications Ice Shelf. The glacier's catchment area is fed by the inland ice sheet of the Antarctic Plateau, making it part of a critical drainage basin. Its position places it within the operational area of several national Antarctic programs, including those of Australia and Norway.

Physical characteristics

The glacier is a typical outlet glacier, characterized by a fast-flowing central ice stream bounded by slower-moving ice. Its surface features include extensive crevasse fields and seracs, particularly near its grounding line. The terminus of Devik Glacier is often defined by a floating ice tongue that extends into the ocean, where it interacts with sea ice and icebergs. Subglacial topography, mapped by missions like NASA's Operation IceBridge, reveals a deep bedrock channel that influences its flow dynamics.

Glacial dynamics and changes

Like many Antarctic glaciers, Devik Glacier has exhibited changes in flow velocity and ice thickness linked to ocean warming and atmospheric circulation patterns. Satellite observations from the European Space Agency's CryoSat-2 and the NASA and USGS-managed Landsat program have documented periodic acceleration and retreat of its terminus. These dynamics are influenced by the incursion of Circumpolar Deep Water onto the continental shelf, which enhances basal melt. Its behavior is often compared to that of nearby systems like the Totten Glacier and Denman Glacier.

Exploration and research

The glacier was first mapped and named during the mid-20th century by the Norwegian Polar Institute, following expeditions in the region. Detailed study began in earnest with the International Geophysical Year, which spurred coordinated research across Antarctica. Modern investigations involve field campaigns by the Australian Antarctic Division and remote sensing analysis by institutions like the British Antarctic Survey and the Scripps Institution of Oceanography. Key research focuses on its mass balance and contribution to global sea level rise.

Significance and naming

Devik Glacier is named in honor of Olav Devik, a noted Norwegian meteorologist and polar researcher who contributed significantly to early Antarctic exploration. Its study is significant for understanding the stability of the East Antarctic Ice Sheet, a major reservoir of freshwater. Data from this glacier inform models used by the Intergovernmental Panel on Climate Change and are part of international collaborations like the International Thwaites Glacier Collaboration. It remains a key site for observing ice-ocean interaction in a warming climate.

Category:Glaciers of Antarctica Category:Princess Elizabeth Land