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| Larsen Glacier | |
|---|---|
| Name | Larsen Glacier |
| Type | Valley glacier |
| Location | Antarctic Peninsula |
| Terminus | Weddell Sea |
| Status | Retreating |
Larsen Glacier is a glacier on the Antarctic Peninsula draining eastward to the Weddell Sea and situated near the Larsen Ice Shelf system. The glacier lies within the region claimed by the United Kingdom, Argentina, and Chile and has been the subject of studies by teams from the British Antarctic Survey, United States Antarctic Program, and British Antarctic Survey collaborators. It has been monitored in research published by institutions such as the National Aeronautics and Space Administration, the European Space Agency, and the Scientific Committee on Antarctic Research.
Larsen Glacier occupies a catchment on the eastern flank of the Antarctic Peninsula between mapped features including the Graham Land coast and the headlands bordering the Weddell Sea. Nearby named features and research sites include the Larsen Ice Shelf sectors, the Nordenskjöld Coast, and field stations such as Rothera Research Station and Seymour Island logistics points. Its drainage basin connects to regional atmospheric circulation patterns influenced by the Southern Ocean, the Antarctic Circumpolar Current, and katabatic flows studied by polar meteorology groups.
The glacier is a valley-type glacier with an ice flow transected by ridges and tributary firn zones common to glaciers on the Antarctic Peninsula. Measurements using instruments from ICESat and CryoSat campaigns have characterized its surface elevation, slope, and areal extent relative to neighboring ice masses like the Prince Gustav Channel glaciers. Bed topography surveys referencing data from the British Antarctic Survey and the Scott Polar Research Institute indicate complex subglacial troughs and grounding-line locations comparable to other outlet glaciers on the peninsula.
Glacier flow and mass balance have been analyzed using methods developed by researchers at Ohio State University and the University of Colorado Boulder combining satellite altimetry, interferometric synthetic aperture radar from ERS-1 and Sentinel-1, and GPS campaigns. Dynamics include basal sliding, internal deformation, and calving processes studied in parallel with outlet glaciers such as those feeding the Larsen B sector. Modeling efforts by teams at the University of Bristol and the Potsdam Institute for Climate Impact Research simulate response to oceanic forcing from the Weddell Sea and atmospheric warming from the Antarctic Peninsula warming trend.
The glacier has shown retreat and thinning consistent with regional warming documented since the late 20th century by groups including the Intergovernmental Panel on Climate Change and the World Meteorological Organization. Observed changes in the glacier’s terminus and mass budget are linked to events such as the collapse of sectors of the Larsen Ice Shelf, with impacts analyzed by researchers at Columbia University’s Lamont‑Doherty Earth Observatory and the University of Maine. Studies citing accelerated retreat reference oceanographic processes measured by NOAA and shelf-ice interactions reported by the Alfred Wegener Institute.
Early charting of the region was conducted during expeditions by the British Graham Land Expedition and surveys by the Falkland Islands Dependencies Survey with later mapping refined by aerial photography from Operation Tabarin and reconnaissance by US Navy Antarctic flights. Naming decisions were formalized by committees such as the UK Antarctic Place-Names Committee and recorded in gazetteers used by the Scientific Committee on Antarctic Research and national hydrographic offices. Field parties from the British Antarctic Survey and international teams have conducted ground campaigns to collect glaciological and geological samples.
Although the glacier itself is an abiotic ice mass, its proglacial zones and nearby coastal waters support ecosystems studied by biologists from the British Antarctic Survey, Australian Antarctic Division, and National Science Foundation programs. Marine productivity in adjacent waters involves krill populations monitored by the Commission for the Conservation of Antarctic Marine Living Resources, while seabird colonies on nearby islands are surveyed by ornithologists from institutions such as the British Trust for Ornithology and the Smithsonian Institution. Ice-microbe communities and cryoconite holes have been subjects of microbiology research linked to teams at the Max Planck Society and the University of Cambridge.
Long-term monitoring employs satellite missions including Landsat, MODIS, ICESat-2, and Sentinel-1 alongside airborne campaigns like Operation IceBridge and ship-based surveys by the RRS James Clark Ross and research vessels chartered by the Alfred Wegener Institute. Collaborative projects draw on expertise from the British Antarctic Survey, University of California, and international consortia coordinated through the Scientific Committee on Antarctic Research and the International Association of Cryospheric Sciences. Current priorities include high-resolution bed mapping, mass-balance quantification, and coupled ice‑ocean modeling in partnership with climate centers such as the Met Office and the National Center for Atmospheric Research.
Category:Glaciers of the Antarctic Peninsula Category:Ice bodies of Graham Land