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The grounding zone—where glaciers transition to floating ice shelves—critically influences ice sheet mass loss yet remains poorly observed. While tides and subglacial freshwater enhance basal melt, the role of sediment-laden subglacial water outflow on ice shelf–ocean dynamics is unexplored.
The Southern Ocean Time Series (SOTS) provides highly temporally resolved observations of the physical, chemical, and biological variability in the upper ocean, as well as the export of particulate organic and inorganic carbon to the ocean interior, in the subantarctic region south of Australia.
Under climate change, both the global water cycle (evaporation minus precipitation) and mixed layer salinity exhibit a pattern amplification characterized by the "rich get richer and poor get poorer." However…
Antarctica is currently losing net mass to the ocean primarily from West Antarctica and the Antarctic Peninsula, which together hold ~5.5?m of sea level rise potential. Yet, the East Antarctic Ice Sheet stores almost ten times more ice…
A proportion of the southern elephant seal (Mirounga leonina) population that breeds in the Kerguelen Plateau region seasonally migrates between their natal sub-Antarctic islands and moult haul-out locations on the Antarctic coastline.
Species distributions are predicted to change with future climate-associated ecosystem changes such that so-called 'vagrant' individuals may become established or re-establish in areas currently thought to be beyond their principle ranges.
Poor coverage of the Antarctic continental shelf bathymetry impedes understanding the oceanographic processes affecting Antarctica’s role in global climate. Continental shelf bathymetry influences warm modified Circumpolar Deep Water movement onto the shelf…
Introduction … Miller and Kelly (2023) provides some guidelines on spatial model-based estimation of abundance (and its uncertainty) from counts of cetaceans obtained using standard distance sampling line transect surveys.
Individual life-history traits, such as age and sex, influence vital rates in most large vertebrate species. Developmental differences are especially profound in polygamous mating systems. One of the most polygamous of all mammals, the southern elephant seal (Mirounga leonina)…
Ecosystem dynamics at the northwest Antarctic Peninsula are driven by interactions between physical and biological processes. For example, baleen whale populations are recovering from commercial harvesting against the backdrop of rapid climate change…
Our understanding of cross-disciplinary connections for Antarctica's role in the Earth system remains incomplete, especially around its coastal margins. The focus here is on sea-ice, oceanic, and atmospheric drivers in the joint Ross Sea-far East Antarctic Region (RSfEAR)…
Directional frequency … analysis and recording (DIFAR) sonobuoys can allow real-time acoustic … localization of baleen whales for underwater tracking and remote sensing, but limited availability of hardware and software has prevented wider usage.
No detailed report on marine mammals has been published … previously from the Australasian Antarctic Expedition of 1911 –14 … (AAE)or the British,Australian and New Zealand Antarctic Research Expedition of 1929 –31 (BANZARE).
The diet of free-living pinnipeds is most frequently estimated through identification of otoliths, squid mouth-parts and exoskeletons … of prey in scats. This is because, although important prey types may not always be detected, sample collection is non-invasive and … analysis is easy.
Food web models depend on identifying which taxa are eaten and in what proportion they are consumed. Arctocephalus … seals are generalist foragers and are an ongoing focus of Southern Hemisphere marine ecosystem research. This is the first … feeding experiment to use Arctocephalus spp.
We investigate using relative amounts of … prey DNA recovered from pinniped faeces to obtain … diet composition data. Faeces were obtained from … captive sea lions being fed a diet containing three fish … species (50%, 36% and 14% by mass).
We compiled and reviewed 248 cases of reported vessel collisions with small cetaceans worldwide and with large … cetaceans in the Southern Hemisphere. Difficulties were encountered with the comparison of highly variable data in … terms of quality (evidence), sources…
Abstract The diet of pinnipeds is most commonly … inferred from morphologically diagnostic remains of prey … in their scats. Although this method can generate quantitative … estimates of diet simply, important prey types may not … always be detected.
Auroral westward flow channels (A WFCs) are intense, narrow channels of westward drift overlapping the equatorward edge of the … auroral oval in the pre-magnetic midnight sector. They are a close relative of the sub-auroral polarisation stream which encompasses … polarisation jets…
Earthward injections of energetic ions and electrons … mark the onset of magnetospheric substorms. In the inner … magnetosphere (L4), the energetic ions drift westward … and the electrons eastward, thereby enhancing the equatorial … ring current.
The leopard seal is a top-order predator in … the Southern Ocean ecosystem and preys on a wide … variety of vertebrate species including seals and penguins. We assessed the use of hairs found in leopard … seal scats to identify the species of pinniped consumed.
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events.