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Discovery Early Career Researcher Award - Grant ID: DE230100025
Funder
Australian Research Council
Funding Amount
$425,143.00
Summary
Probing Antarctic Ice Sheet by Correlation Seismology. This project aims to advance research on the internal structure and temporal change in the Antarctic ice sheet by analysing seismic ground motion records of natural sources, including ambient noise. This approach expects to complement existing satellite and airborne methods to resolve glacial structures over large areas and detect changes hidden under snow cover. The intended outcome is new knowledge of the ice sheet’s stratification, its lo ....Probing Antarctic Ice Sheet by Correlation Seismology. This project aims to advance research on the internal structure and temporal change in the Antarctic ice sheet by analysing seismic ground motion records of natural sources, including ambient noise. This approach expects to complement existing satellite and airborne methods to resolve glacial structures over large areas and detect changes hidden under snow cover. The intended outcome is new knowledge of the ice sheet’s stratification, its long-term variation due to climate change, and its rapid response to local weather events. The benefits include improving the reliability of ice sheet evolution modelling and sea-level rise prediction, unlocking a polar gateway to study Earth deep interior, and preparing for space missions to icy worlds. Read moreRead less
THE BASAL MELTING OF ANTARCTIC ICE SHELVES . The project aims to determine the mechanisms that govern melting of Antarctic ice shelves into the ocean. Faster basal melting of ice shelves in the warming ocean is contributing to loss of grounded ice from Antarctica and increased glacier speeds, and melting is projected to become a larger contribution to future global sea level rise. Using unique laboratory experiments, turbulence-resolving computation and theoretical analysis the project will eva ....THE BASAL MELTING OF ANTARCTIC ICE SHELVES . The project aims to determine the mechanisms that govern melting of Antarctic ice shelves into the ocean. Faster basal melting of ice shelves in the warming ocean is contributing to loss of grounded ice from Antarctica and increased glacier speeds, and melting is projected to become a larger contribution to future global sea level rise. Using unique laboratory experiments, turbulence-resolving computation and theoretical analysis the project will evaluate the roles of meltwater, ocean currents, internal wave breaking and water exchanges between the continental shelf and sub-ice cavities. The results will assist our understanding of measurements made in Antarctica and more reliable predictions of sea level rise.Read moreRead less
Southern Ocean Sea Ice – what happened and what happens next? This project will adress our lack of confidence in future projections of sea ice around Antarctica by elucidating the mechanisms controlling sea ice in the Southern Ocean.
There is low confidence is current sea ice projections, limiting our ability to predict ice shelf melt and sea level rise.
This project will lead to a detailed understanding of the future of sea ice in the Southern Ocean, improving our understanding of ocean dynam ....Southern Ocean Sea Ice – what happened and what happens next? This project will adress our lack of confidence in future projections of sea ice around Antarctica by elucidating the mechanisms controlling sea ice in the Southern Ocean.
There is low confidence is current sea ice projections, limiting our ability to predict ice shelf melt and sea level rise.
This project will lead to a detailed understanding of the future of sea ice in the Southern Ocean, improving our understanding of ocean dynamics, ice shelf melt, and sea level rise.
The results from this project will enhance projections of sea ice, and therefore also ice shelf melt and sea level rise. Improved sea level projections will aid policy decisions for coastal communities.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE240100267
Funder
Australian Research Council
Funding Amount
$444,000.00
Summary
Great Antarctic uncertainties: How to better predict rising sea levels. This DECRA project aims to significantly reduce the uncertainties in future projections of the Antarctic contribution to global and regional sea-level rise. This will be achieved by including, for the first time, the influence of interactions with the subglacial hydrologic system and surrounding ocean circulation on the ice sheet dynamics, using a coupled ice–ocean–hydrology model. This research will build on Dr Zhao's inter ....Great Antarctic uncertainties: How to better predict rising sea levels. This DECRA project aims to significantly reduce the uncertainties in future projections of the Antarctic contribution to global and regional sea-level rise. This will be achieved by including, for the first time, the influence of interactions with the subglacial hydrologic system and surrounding ocean circulation on the ice sheet dynamics, using a coupled ice–ocean–hydrology model. This research will build on Dr Zhao's international expertise in ice sheet modelling and coupled ice–ocean modelling. This project provide substantial benefits to Australia and internationally, particularly in regions vulnerable to rising sea levels, by producing more accurate sea-level rise projections for policy and mitigation strategies.Read moreRead less
Using animal-borne sensors to unravel East Antarctic coastal productivity. This project will examine the mechanisms underpinning the high productivity in Antarctic coastal polynyas, which are ice-free oases within the sea ice supporting abundant marine life. The study expects to generate essential new biochemical and biological observations using autonomous platforms to understand phytoplankton dynamics in these inaccessible habitats along Australia’s Antarctic Territory. Expected outcomes inclu ....Using animal-borne sensors to unravel East Antarctic coastal productivity. This project will examine the mechanisms underpinning the high productivity in Antarctic coastal polynyas, which are ice-free oases within the sea ice supporting abundant marine life. The study expects to generate essential new biochemical and biological observations using autonomous platforms to understand phytoplankton dynamics in these inaccessible habitats along Australia’s Antarctic Territory. Expected outcomes include novel insight into the role of iron supply from melting glaciers in supporting marine production. This should reduce the high uncertainty in prognoses for polynya activity under anthropogenic climate change, and support Australia’s international leadership in conservation and management of important Antarctic ecosystems.Read moreRead less
Cloud-climate interaction over the Great Barrier Reef and Southwest Pacific. This project aims to investigate cloud-climate interactions of the Southwest Pacific trade wind region from the regional scale to local forcing over the Great Barrier Reef. The project expects to generate new knowledge in the nature and variability of the trade wind clouds, including their impact on the surface radiative budget, ocean temperatures and coral bleaching events. Potential changes of these clouds due to glob ....Cloud-climate interaction over the Great Barrier Reef and Southwest Pacific. This project aims to investigate cloud-climate interactions of the Southwest Pacific trade wind region from the regional scale to local forcing over the Great Barrier Reef. The project expects to generate new knowledge in the nature and variability of the trade wind clouds, including their impact on the surface radiative budget, ocean temperatures and coral bleaching events. Potential changes of these clouds due to global warming and ensuing impacts on the environment will be studied. Expected outcomes include better modelling of the Great Barrier Reef environment and improved estimates of low-cloud feedback. This should provide significant benefits in developing warning systems for bleaching events, and regional land and water management. Read moreRead less
Antarctica's leaky defence to poleward heat transport. Southern Ocean currents are barriers to the oceanic transport of heat toward Antarctica. This barrier breaks down at key locations along their path and the poleward heat transport is enhanced. Changing winds are expected to accelerate heat transport, threatening ice shelves that protect Antarctic glaciers from ocean-driven melt. This project aims to advance understanding of the small-scale processes that control heat transport across the Sou ....Antarctica's leaky defence to poleward heat transport. Southern Ocean currents are barriers to the oceanic transport of heat toward Antarctica. This barrier breaks down at key locations along their path and the poleward heat transport is enhanced. Changing winds are expected to accelerate heat transport, threatening ice shelves that protect Antarctic glaciers from ocean-driven melt. This project aims to advance understanding of the small-scale processes that control heat transport across the Southern Ocean. By combining funded international field campaigns that harness new advances in observing systems with next-generation numerical modelling, this research will create a step-change in our ability to predict Southern Ocean environmental change.Read moreRead less
Defining the biological boundaries to sustain extant life on Mars. Key challenges for life are access to water & energy, and in cold, arid environments trace gas chemotrophy is used by soil microbiomes to sustain life. Given the cold, hyper-arid conditions on the Martian surface are analogues to ice-free regions of Antarctica, atmospheric chemoautotrophic ecosystems are the most promising ecological model for Martian life in the present or recent past. This project is significant, as it aims to ....Defining the biological boundaries to sustain extant life on Mars. Key challenges for life are access to water & energy, and in cold, arid environments trace gas chemotrophy is used by soil microbiomes to sustain life. Given the cold, hyper-arid conditions on the Martian surface are analogues to ice-free regions of Antarctica, atmospheric chemoautotrophic ecosystems are the most promising ecological model for Martian life in the present or recent past. This project is significant, as it aims to define the limits to energy, water and carbon production via trace gas chemotrophy. We will integrate biology with astrophysics to identify at which point life ceases. Expected outcomes include new knowledge on the biological envelope, with benefits to include the identification of Martian regions for exploration.Read moreRead less
Determining the links between size and function in phytoplankton. Marine phytoplankton are responsible for around 50% of the carbon fixation on planet. This project will examine how phytoplankton size declines will alter marine food webs and carbon sequestration. Changes in nutrients and temperature will cause phytoplankton to be smaller but the consequences of these changes are uncertain because of a lack of knowledge regarding how changes in cell size affect function within a species. This pro ....Determining the links between size and function in phytoplankton. Marine phytoplankton are responsible for around 50% of the carbon fixation on planet. This project will examine how phytoplankton size declines will alter marine food webs and carbon sequestration. Changes in nutrients and temperature will cause phytoplankton to be smaller but the consequences of these changes are uncertain because of a lack of knowledge regarding how changes in cell size affect function within a species. This project will evolve 20 species of algae to be different sizes and estimate the consequences of these size changes for biological functions. The project will then use these data to refine global models of carbon budgets, leading to better predictions about how the global carbon pump will change. Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE230100542
Funder
Australian Research Council
Funding Amount
$454,741.00
Summary
Microbial life in the atmosphere. This project aims to resolve the nature and basis of microbial life in the atmosphere, the largest but most unexplored potential ecosystem on Earth. The atmosphere plays a role in transporting microbes, but our understanding of resident atmospheric microbial communities and their role in global atmospheric processes is minimal. Using cutting-edge molecular and biogeochemical approaches, this project aims to identify true microbial residents of the atmosphere, un ....Microbial life in the atmosphere. This project aims to resolve the nature and basis of microbial life in the atmosphere, the largest but most unexplored potential ecosystem on Earth. The atmosphere plays a role in transporting microbes, but our understanding of resident atmospheric microbial communities and their role in global atmospheric processes is minimal. Using cutting-edge molecular and biogeochemical approaches, this project aims to identify true microbial residents of the atmosphere, understand their mechanisms for survival in this environment and explore their role in seeding newly formed environments. The anticipated outcomes include fundamental knowledge on atmospheric microbial ecosystems, and their influence on global atmospheric processes.Read moreRead less