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Opening of the Tasman sea and the separation of Australia and Antarctica: temporal and isotopic constraints to further test the deep-seated Balleny plume vs. tectonic reorganization models CAREY, Dr Rebecca Australia (or home country)

Stationary plumes of buoyant molten rock can rise from deep within the Earth forming chains of volcanoes on the seafloor. The Balleny Plume is thought to have produced a ~1200 km chain of volcanoes to the east of Tasmania, but the timing of volcanism is poorly known.

Diseases of Antarctic Wildlife DEWAR, Dr Meagan Australia (or home country)

Infectious disease is one of the leading causes of mortality and morbidity in wildlife and humans worldwide. In Antarctica, increased human activity and climate change are having significant impacts of wildlife populations, increasing their susceptibility to pathogenic microorganisms and disease.

Old-growth mosses as proxies for past Antarctic climates WATERMAN, Dr Melinda Davis, Other Antarctic Location (Territory of Heard Island and McDonald Islands), Casey, Australia (or home country)

We have recently shown that the lush moss beds of the Windmill Islands, East Antarctica are rapidly drying due to cooler, windier summers caused by ozone depletion and climate change.

Onset of the Antarctic Circumpolar Current WHITTAKER, Prof. Joanne (Jo) Australia (or home country)

The rearrangement of continents over geological timescales can open new connections between the Earth's major oceans. These oceanic seaways can dramatically influence patterns of ocean circulation and are implicated in the onset and expansion of glaciation at both poles.

East Antarctic Synthesis of Ice cores (EASI) - Ice core records of continental, hemispheric and global variability and change MOY, Dr Andrew Other Antarctic Location (Territory of Heard Island and McDonald Islands), Australia (or home country)

Ice cores provide valuable records of past climatic and environmental variability and change.

Formation of William’s Ridge, Kerguelen Plateau: tectonics, and Australia’s Extended Continental Shelf WHITTAKER, Prof. Joanne (Jo) Marine Science, Australia (or home country)

The Indian Ocean contains numerous enigmatic topographic features, and some of the least understood are submarine ridges. Our expedition will focus on William's Ridge, part of Earth's second largest submarine plateau, the Kerguelen Plateau, and on the once adjoining Broken Ridge.

Law Dome Summit Snow-Climate Observatory MOY, Dr Andrew Other Antarctic Location (Territory of Heard Island and McDonald Islands)

Law Dome Summit ice cores provide a unique record of climate variability and change. These records have very high-resolution making them particularly suitable for calibration with meteorological data, and therefore improving the interpretation of ice core records more generally.

Securing Antarctica's Environmental Future (SAEF) - Casey 2021-22 CHOWN, Prof. Steven Australia (or home country), Casey, Macquarie Island

Securing Antarctica's Environmental Future (SAEF) is a Special Research Initiative of the Australian Research Council.

Airborne sea-ice thickness: Synoptic spring-time assessment HEIL, Dr Petra Davis, Australia (or home country)

The Antarctic sea ice plays a crucial role in the Antarctic climate and eco-systems, and is closely linked to under shelf ice-ocean processes.

Determining the Extent and Nature of the Oldest Crust in Antarctica WILDE, Prof. Simon Australia (or home country)

A large inventory of samples, collected by past Australian expeditions to Antarctica, reside with Geoscience Australia and provide a unique treasure-trove of information that can now be tapped, following major advances in knowledge and instrumentation over the past three decades.

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