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Pre-industrial sea-surface temperatures in the Australian region. Humanity faces an enormous challenge as there is much debate on whether the world is warming up and when this started. This project will document sea-surface temperature records over the last millennium for the Australian region and provide data of critical importance to global climatology and oceanography that precede the instrumental record.
Deep Atlantic’s role in millennial atmospheric carbon dioxide changes. This project aims to fill in a critical knowledge gap in global carbon cycle research, by generating the first high-resolution deep Atlantic carbonate ion and nutrient records for the last 150,000 years. The project will derive air-sea carbon dioxide (CO2) exchange signals, which permit straightforward evaluation of the deep Atlantic’s role in millennial atmospheric CO2 changes under various climate conditions. The intended o ....Deep Atlantic’s role in millennial atmospheric carbon dioxide changes. This project aims to fill in a critical knowledge gap in global carbon cycle research, by generating the first high-resolution deep Atlantic carbonate ion and nutrient records for the last 150,000 years. The project will derive air-sea carbon dioxide (CO2) exchange signals, which permit straightforward evaluation of the deep Atlantic’s role in millennial atmospheric CO2 changes under various climate conditions. The intended outcome of this project is to substantially improve our understanding of the mechanisms that govern the global carbon cycle. This should provide significant benefits including the assessment of models used to predict future global warming due to anthropogenic CO2.Read moreRead less
Mid-depth Atlantic circulation during the Last Glacial Maximum and deglaciation. The history of ocean circulation at the intermediate water depth remains controversial, limiting our understanding of the interplay of ocean circulation, climate changes, and the global carbon cycle. This project aims to generate trace elemental and isotopic records for 10 key locations in the Atlantic Ocean, which constrain physicochemical properties of water masses at unprecedented temporal resolution during the l ....Mid-depth Atlantic circulation during the Last Glacial Maximum and deglaciation. The history of ocean circulation at the intermediate water depth remains controversial, limiting our understanding of the interplay of ocean circulation, climate changes, and the global carbon cycle. This project aims to generate trace elemental and isotopic records for 10 key locations in the Atlantic Ocean, which constrain physicochemical properties of water masses at unprecedented temporal resolution during the last glacial maximum and the subsequent deglaciation. This multi-proxy approach will reconcile controversy and pin down the evolution of mid-depth Atlantic circulation in the past, and thereby substantially improve our understanding of the climate system.Read moreRead less
Deep-sea carbonate cycles and their role in glacial-interglacial atmospheric CO2 changes. The causes for past atmospheric carbon dioxide (CO2) changes and their mechanistic links to the histories of climate and ocean carbonate chemistry remain elusive, but may hold future-relevant information. This project aims to use novel methods to quantify deep ocean carbonate ion concentrations, a critical but poorly constrained parameter of the global carbon cycle, at 10 key locations spanning the global o ....Deep-sea carbonate cycles and their role in glacial-interglacial atmospheric CO2 changes. The causes for past atmospheric carbon dioxide (CO2) changes and their mechanistic links to the histories of climate and ocean carbonate chemistry remain elusive, but may hold future-relevant information. This project aims to use novel methods to quantify deep ocean carbonate ion concentrations, a critical but poorly constrained parameter of the global carbon cycle, at 10 key locations spanning the global ocean during the last 350 000 years. By feeding new data into a model, this project aims to gain critical insights into mechanisms controlling past deep-sea carbonate cycles and atmospheric CO2 changes, thereby leading to improved understandings of the climate system.Read moreRead less
Oceanic gateways: a primary control on global climate change? The opening and closing of oceanic gateways, narrow passageways facilitating exchange between ocean basins, has been linked to major changes in Earth’s climate. This project will link the disparate fields of geodynamics and palaeo-climatology, for the first time, through an innovative methodology that models the changing width and depth of ocean gateways through time. It will address the role of gateways in modulating Earth’s climate ....Oceanic gateways: a primary control on global climate change? The opening and closing of oceanic gateways, narrow passageways facilitating exchange between ocean basins, has been linked to major changes in Earth’s climate. This project will link the disparate fields of geodynamics and palaeo-climatology, for the first time, through an innovative methodology that models the changing width and depth of ocean gateways through time. It will address the role of gateways in modulating Earth’s climate at key periods during the planet’s transition from a “Greenhouse” to “Icehouse” World.Read moreRead less
Geomorphological development of coral reefs, southern Great Barrier Reef: an integrated record of Holocene palaeoecology and palaeoclimate from cores. Very little is known about how the Great Barrier Reef (GBR) has responded or may respond to predicted environmental change and/or degradation. The project will reconstruct the recent biological and physical history of reefs in the southern GBR in order to better understand how they may react to future environmental changes.
Discovery Early Career Researcher Award - Grant ID: DE190100042
Funder
Australian Research Council
Funding Amount
$350,000.00
Summary
Long-term variability of the Australian monsoon. This project aims to address large uncertainties in Australia’s hydroclimate projections, by reconstructing Australian monsoon variability over the past three million years. The project expects to generate new knowledge to quantify the frequency and amplitudes of extreme rainfall and drought in Northwest Australia. By providing essential new information about the timing, frequency, and intensity of past drought and extreme rainfall, the project is ....Long-term variability of the Australian monsoon. This project aims to address large uncertainties in Australia’s hydroclimate projections, by reconstructing Australian monsoon variability over the past three million years. The project expects to generate new knowledge to quantify the frequency and amplitudes of extreme rainfall and drought in Northwest Australia. By providing essential new information about the timing, frequency, and intensity of past drought and extreme rainfall, the project is expected to enable more accurate climate projections required for effective adaptation and mitigation. This project will also benefit the Australian archaeology community, by providing a much-needed environmental context for mapping Australian pre-history.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100041
Funder
Australian Research Council
Funding Amount
$100,000.00
Summary
A high-resolution isotope facility for low cost analysis of water, plant, and soil/sediment samples to understand environmental change. The most significant environmental challenges facing Australia include ensuring sustainable management of our water resources and conservation of both terrestrial and marine biodiversity, particularly in the face of our changing climate and land-use. The new instruments will accelerate progress across a number of projects aimed at understanding the developme ....A high-resolution isotope facility for low cost analysis of water, plant, and soil/sediment samples to understand environmental change. The most significant environmental challenges facing Australia include ensuring sustainable management of our water resources and conservation of both terrestrial and marine biodiversity, particularly in the face of our changing climate and land-use. The new instruments will accelerate progress across a number of projects aimed at understanding the development of groundwater resources, the relative dependency of ecosystems on groundwater versus soil and surface water, and an assessment of the likely impacts of altered hydrology, especially dewatering and salinisation, on ecosystems. In addition, they will also be used to extend our knowledge of climate variability in the recent past and increase understanding of critical marine resources.Read moreRead less
Past to future changes in ocean dynamics and biogeochemistry. This project aims to understand the impact of changes in ocean circulation on marine biogeochemistry, climate and ultimately the Antarctic ice-sheet by combining transient simulations of the last glacial cycle performed with an Earth system model incorporating the compilation of paleoproxy records. The oceanic circulation has varied over the last glacial cycle (~140,000 years) and is expected to change over the coming centuries due t ....Past to future changes in ocean dynamics and biogeochemistry. This project aims to understand the impact of changes in ocean circulation on marine biogeochemistry, climate and ultimately the Antarctic ice-sheet by combining transient simulations of the last glacial cycle performed with an Earth system model incorporating the compilation of paleoproxy records. The oceanic circulation has varied over the last glacial cycle (~140,000 years) and is expected to change over the coming centuries due to rising atmospheric carbon dioxide. The project will measure future changes in oceanic circulation on ocean acidification and oxygen content with a state-of-the-art high-resolution ocean carbon cycle model. This will lead to improved understanding of processes and feedbacks within the Earth system.Read moreRead less
Ice sheet collapse, sea-level rise and Australian coastal response. The project is designed to contribute to answering important questions in climate change: Which polar ice sheets are the most vulnerable to warming? How fast will sea levels rise? What will be the impact on global coasts during the 21st century? The response of polar ice sheets to modest increases in global temperature and the rate of future sea-level rise remains highly uncertain. The project plans to examine the retreat of the ....Ice sheet collapse, sea-level rise and Australian coastal response. The project is designed to contribute to answering important questions in climate change: Which polar ice sheets are the most vulnerable to warming? How fast will sea levels rise? What will be the impact on global coasts during the 21st century? The response of polar ice sheets to modest increases in global temperature and the rate of future sea-level rise remains highly uncertain. The project plans to examine the retreat of the polar ice sheets during the last warm interglacial period and the sea-level record archived in the Australian coastal sediments and morphology. It plans to use this unique sea-level signal to fingerprint the ice sheets that contributed the excess meltwater to the oceans and to map the configuration of the southern Australian coast under higher sea levels than present.Read moreRead less