Vincennes Bay

Vincennes Bay is an ice-filled embayment on the coast of Wilkes Land in East Antarctica. It lies north of the Windmill Islands and receives major glaciers draining the interior of the Antarctic Ice Sheet. The bay has been the focus of expeditions by United States Exploring Expedition, United States Navy operations, and modern studies by institutions such as Australian Antarctic Division and NASA.

Geography

The bay is bounded by coastal features including the Windmill Islands, Clark Peninsula, and the broad margin of Wilkes Land. Major outlet glaciers that terminate in the bay include Totten Glacier, Mawson Glacier, and Scott Glacier (Antarctica), with ice shelves and fast ice occupying much of the embayment. The regional topography is influenced by underlying bedrock of the East Antarctic Shield and subglacial basins imaged by Operation IceBridge and surveys from Geoscience Australia. Ice thickness and grounding-line positions are mapped using radar from Space Shuttle Endeavour missions, ICESat laser altimetry, and CryoSat-2 gravimetry. Sea-ice extent and polynya locations around the bay are routinely monitored by NOAA satellites, European Space Agency sensors, and the Bureau of Meteorology (Australia).

Glaciology and Ice Dynamics

The bay receives drainage from major catchments of the Antarctic Ice Sheet, notably the Totten Glacier system which drains a portion of the East Antarctic Interior such as areas mapped by the BedMachine Antarctica project. Ice-stream dynamics are influenced by basal conditions related to subglacial hydrology revealed by studies from British Antarctic Survey, Australian Antarctic Division, and Chinese Antarctic Program teams. Rapid changes in the grounding line of tributary glaciers have been detected with interferometric synthetic aperture radar from ERS-1, ERS-2, Envisat, and Sentinel-1. Research published by scientists at Scripps Institution of Oceanography and Lamont–Doherty Earth Observatory links melting to warm modified Circumpolar Deep Water advected by troughs documented in surveys by RV Nathaniel B. Palmer and RV Aurora Australis. Ice-shelf buttressing, calving processes, and frontal moraines in the bay have been analyzed using time series from Landsat, MODIS, and ASTER instruments.

Climate and Oceanography

Regional climate drivers include the Southern Annular Mode, variations associated with the El Niño–Southern Oscillation, and synoptic systems tracked by the Australian Antarctic Division models. Oceanographic studies reveal seasonal variability in surface stratification and mixed-layer depth measured during cruises by CSIRO and Woods Hole Oceanographic Institution. The bay interacts with the Southern Ocean circulation, where inflow of modified Circumpolar Deep Water influences basal melting of outlet glaciers. Hydrographic sections collected by crews from Lamont–Doherty Earth Observatory and Alfred Wegener Institute show temperature and salinity gradients linked to polynya-driven dense-water formation observed by INSTANT and Argo profiling floats adapted for polar waters. Atmospheric forcing and katabatic winds originating over the Antarctic Plateau modulate sea-ice production and lead formation near the bay.

History of Exploration and Naming

Early encounters with the coastal sector were recorded during voyages by the United States Exploring Expedition under Charles Wilkes, and later operations including Operation Highjump and Operation Windmill conducted by the United States Navy. The bay and adjacent landmarks were charted by these missions and by subsequent Australian expeditions based at Mawson Station and Casey Station. Aerial photographic surveys from Operation Highjump and mapping projects by USGS contributed to modern nomenclature and cartography. Scientific parties from Australian National University, Scripps Institution of Oceanography, and Victorian Institute of Marine Sciences have mounted field campaigns to study glacier dynamics, oceanography, and biodiversity. International coordination through Scientific Committee on Antarctic Research facilitated collaborative programs and data sharing about the bay.

Wildlife and Ecosystems

Sea-ice habitats in the bay support krill and microalgal blooms that underpin food webs studied by ecologists from Antarctic Research Centre (Victoria University of Wellington), University of Tasmania, and CSIRO. Foraging seabirds including species monitored by Australian Antarctic Division and BirdLife International exploit nearby polynyas, while pinniped populations recorded in the region have been studied by teams from University of California, Santa Cruz and University of New South Wales. Phytoplankton dynamics and biogeochemical cycling have been sampled aboard research vessels such as RV Tangaroa and RV Aurora Australis, with molecular ecology work undertaken at Monash University and University of Wollongong. Benthic communities on the continental shelf receive organic fluxes linked to glacial meltwater and have been surveyed by expeditions from Australian Antarctic Division and the Institute of Marine and Antarctic Studies.

Category: Bays of Wilkes Land