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| Kohler Glacier | |
|---|---|
| Name | Kohler Glacier |
| Location | Marie Byrd Land, Antarctica |
| Coordinates | 74°30′S 114°00′W |
| Length | ~9 nautical miles (17 km) |
| Terminus | Dotson Ice Shelf / Amundsen Sea |
| Status | Retreating |
Kohler Glacier
Kohler Glacier is a valley glacier on the Walgreen Coast of Marie Byrd Land in Antarctica, flowing north to the Dotson Ice Shelf in the eastern sector of the Amundsen Sea. The glacier lies near the base of the Walgreen Coast and drains part of the ice sheet adjacent to the Getz Ice Shelf region, contributing to mass flux into the Southern Ocean. Scientific interest in this glacier has increased because of its role in regional ice dynamics and links to contemporary studies of ice-sheet stability and sea-level rise.
Kohler Glacier is situated in western Marie Byrd Land between prominent features such as Mount Murphy and the Siple Coast margin, feeding into the Dotson Ice Shelf near the eastern Amundsen embayment. The glacier lies within a network of tributaries and outlet glaciers that include neighboring ice streams and glaciers mapped during expeditions by the United States Geological Survey and the United States Navy Operation Deep Freeze. Regional mapping has connected Kohler to coastal polynyas and nearby oceanographic features investigated by teams from the National Science Foundation and the British Antarctic Survey.
The glacier extends roughly 9 nautical miles and exhibits a relatively steep tributary trunk bounded by bedrock ridges and nunataks that were charted during aerial reconnaissance by the Byrd Antarctic Expedition. Ice thickness estimates derived from radar surveys conducted by the British Antarctic Survey and the NASA Operation IceBridge indicate substantial basal relief and variable shear zones. The terminus contacts the Dotson Ice Shelf, and ice mélange near the grounding zone shows calving patterns similar to other Amundsen Sea outlets mapped by international collaborations including the Australian Antarctic Division and the Chinese Arctic and Antarctic Administration.
Kohler Glacier’s flow is influenced by basal sliding, internal deformation, and buttressing effects from the adjacent Dotson and Getz ice shelves studied with remote sensing from Landsat, TerraSAR-X, and ICESat missions. Ice velocity fields resolved by the European Space Agency and NASA show acceleration episodes correlated with changes in the grounding line and sub-ice-shelf melt rates measured by oceanographic cruises associated with the Woods Hole Oceanographic Institution and the Scripps Institution of Oceanography. Numerical models developed at institutions such as Columbia University’s Lamont-Doherty Earth Observatory and the University of Washington simulate responses to basal melting and pinning point loss, reflecting complex interactions seen across the Amundsen Sea sector.
Since the late 20th century, Kohler Glacier has exhibited retreat consistent with regional warming of the Amundsen Sea and enhanced ocean-driven basal melting linked to incursions of modified Circumpolar Deep Water documented by NOAA and international oceanographic programs. Observations from the European Organisation for the Exploitation of Meteorological Satellites and ice elevation records from ICESat-2 indicate surface lowering and grounding-line migration comparable to trends at Pine Island Glacier and Thwaites Glacier. Climate model intercomparisons involving groups at Princeton University and the University of Cambridge project future contributions to global sea level contingent on sub-shelf circulation and atmospheric forcing scenarios assessed by the Intergovernmental Panel on Climate Change.
The glacier was delineated from aerial photographs obtained during reconnaissance flights by the U.S. Navy and was subsequently named by the Advisory Committee on Antarctic Names for individuals associated with Antarctic operations. Early mapping efforts included work by the Byrd Antarctic Expedition and later surveys by the United States Geological Survey, with field parties from international stations such as McMurdo Station and Byrd Station contributing logistics. The naming followed protocols observed by national naming authorities that coordinate through the Scientific Committee on Antarctic Research.
Kohler Glacier has been the focus of airborne radar campaigns like Operation IceBridge, satellite altimetry and interferometry studies by NASA and the European Space Agency, and oceanographic sampling by research vessels from the Lamont–Doherty Earth Observatory and the Alfred Wegener Institute. Time-series analyses combining MODIS imagery, synthetic-aperture radar collected by Sentinel-1, and gravimetric data from GRACE have been used to assess mass balance and grounding-line behavior. Collaborative projects involving the National Center for Atmospheric Research and university glaciology groups have published regional assessments integrating in situ GPS, seismic surveys, and coupled ice–ocean model outputs.
Although the glacier itself is inhospitable, the surrounding Amundsen Sea and Dotson Ice Shelf region support marine ecosystems studied by marine biologists from institutions like the British Antarctic Survey and the Scott Polar Research Institute. Open-water zones and polynyas near the glacier’s terminus influence populations of Antarctic krill, Adelie penguin foraging grounds, and marine mammal distributions including Weddell seal and leopard seal observations recorded during multidisciplinary cruises. Research linking physical changes in ice shelves to biogeochemical fluxes involves teams from the Monterey Bay Aquarium Research Institute and the University of Tasmania.
Category:Glaciers of Marie Byrd Land