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Ocean fertilisation: a positive effect from Antarctica’s great thaw? This project will evaluate how the Antarctica's great thaw may fertilise the Southern Ocean with iron and help mitigate carbon dioxide emissions now and in the future. The Southern Ocean is anaemic, meaning that the iron levels are too low to sustain photosynthesis, a pathway by which the oceans transform carbon dioxide into carbon-rich sediments. There is evidence that melting ice may supply substantial amount of iron, capable ....Ocean fertilisation: a positive effect from Antarctica’s great thaw? This project will evaluate how the Antarctica's great thaw may fertilise the Southern Ocean with iron and help mitigate carbon dioxide emissions now and in the future. The Southern Ocean is anaemic, meaning that the iron levels are too low to sustain photosynthesis, a pathway by which the oceans transform carbon dioxide into carbon-rich sediments. There is evidence that melting ice may supply substantial amount of iron, capable of boosting marine life and removing carbon dioxide. As polar regions show the earliest and most severe impacts of anthropogenic activity, studying ice-ocean interactions is central to supporting national and international policy development that can effectively limit the worst impacts of climate change globally. Read moreRead less
The Antarctic Slope Current in a warming climate. Melting Antarctic ice sheets are responsible for 28% of global sea level rise in recent decades, and can contribute more than 1 metre of sea level rise by year 2100, and a staggering 15 metres by 2500. Increased glacial melt rates are best understood by studying changes in the circulation of water around the Antarctic coastline. The combination of physical processes that must be resolved in this region places a high demand on ocean observations a ....The Antarctic Slope Current in a warming climate. Melting Antarctic ice sheets are responsible for 28% of global sea level rise in recent decades, and can contribute more than 1 metre of sea level rise by year 2100, and a staggering 15 metres by 2500. Increased glacial melt rates are best understood by studying changes in the circulation of water around the Antarctic coastline. The combination of physical processes that must be resolved in this region places a high demand on ocean observations and modelling systems. This project uses a series of high-resolution ocean and ice experiments, cross-validated with observations, to provide a deeper understanding of how waters at the Antarctic margin respond to both anthropogenic and natural climate forcing.Read moreRead less
Improving models of West Antarctic glacial isostatic adjustment through a new surface velocity field. This project seeks to "fix the scales" being used to weigh changes in the Antarctic ice sheet. Present measurements are biased by a failure to accurately account for mass changes beneath the ice and within the Earth itself. This project seeks to use new measurements of the changes in the shape of the Earth to calibrate out that bias.
The puzzle of landfast sea ice: ‘Fast’ ice and near-term climate impacts. Sea ice which is held motionless against the Antarctic coastline (so-called landfast, or 'fast' ice) is hugely important for global climate and Southern Ocean ecosystems but its extent has recently plummeted. This project will address major knowledge gaps by providing novel satellite-based mapping and analysis of fast ice extent, towards enabling incorporation of fast ice into Australia’s new sea ice-ocean Earth system mod ....The puzzle of landfast sea ice: ‘Fast’ ice and near-term climate impacts. Sea ice which is held motionless against the Antarctic coastline (so-called landfast, or 'fast' ice) is hugely important for global climate and Southern Ocean ecosystems but its extent has recently plummeted. This project will address major knowledge gaps by providing novel satellite-based mapping and analysis of fast ice extent, towards enabling incorporation of fast ice into Australia’s new sea ice-ocean Earth system model for the first time – to allow assessment of its impacts on global ocean circulation and ice shelf melt. Outcomes also include new automated capability for monitoring fast ice extent, analysis of its variability and drivers, and first maps of its thickness and roughness.Read moreRead less
Where currents collide: tracking the biological impacts of climate change. This project will track the effects of climate change on Australia's unique marine biodiversity. Understanding the impacts of changing ocean currents on our coastal communities underpins the conservation and management of our valuable coastal resources.
Southern Ocean oxygen variability since the last glacial maximum. Recently observed decreases in ocean oxygen concentration could decrease ocean biodiversity and accelerate climate change. This project will determine the links between climate change and ocean oxygenation since the last ice age, and provide a way to predict future oxygen concentrations.
Autonomous platforms and biotagging data: new approaches for understanding variability and change across the Antarctic ocean/sea-ice climate system. This project aims to advance our ability to assess and monitor climate change across the Antarctic ocean/sea-ice system. Ocean/sea-ice interactions have a critical role in the global climate and there is an urgent need to determine how these are responding to climate change. This project will overcome gaps in existing observational datasets that cur ....Autonomous platforms and biotagging data: new approaches for understanding variability and change across the Antarctic ocean/sea-ice climate system. This project aims to advance our ability to assess and monitor climate change across the Antarctic ocean/sea-ice system. Ocean/sea-ice interactions have a critical role in the global climate and there is an urgent need to determine how these are responding to climate change. This project will overcome gaps in existing observational datasets that currently limit our understanding of spatiotemporal variability and change in ocean around Antarctica. This study will use two new approaches, biotagging and autonomous platforms, to greatly improve our capacity to model and predict the impacts of climate change on the Antarctic ocean/sea ice system and beyond.Read moreRead less