Is there a climatic tipping point for Antarctic Bottom Water formation? Antarctic Bottom Water plays an important role in global ocean circulation and climate and yet its formation is also highly sensitive to climate change. This project will analyse new seafloor, core and water samples from the understudied Cape Darnley, East Antarctica, collected on a voyage in early 2022. This new data will be used in combination with an improved high resolution regional ocean model, to understand modern and ....Is there a climatic tipping point for Antarctic Bottom Water formation? Antarctic Bottom Water plays an important role in global ocean circulation and climate and yet its formation is also highly sensitive to climate change. This project will analyse new seafloor, core and water samples from the understudied Cape Darnley, East Antarctica, collected on a voyage in early 2022. This new data will be used in combination with an improved high resolution regional ocean model, to understand modern and past Antarctic Bottom Water formation under different climate states (warmer and colder than present), to determine if there are climate tipping points for the shut down of Antarctic Bottom Water formation. The anticipated benefits include a better understanding of future climate change on this important water mass.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE210100028
Funder
Australian Research Council
Funding Amount
$3,000,000.00
Summary
Australian Membership of the International Ocean Discovery Program. This proposal is for an 18-month membership of the International Ocean Discovery Program (IODP), the world’s largest collaborative research program in Earth and Ocean sciences. The Program studies the history and current activity of the Earth by conducting seagoing coring expeditions and monitoring of instrumented boreholes, using globally unique infrastructure that Australians would otherwise have no access to. Program outcomes ....Australian Membership of the International Ocean Discovery Program. This proposal is for an 18-month membership of the International Ocean Discovery Program (IODP), the world’s largest collaborative research program in Earth and Ocean sciences. The Program studies the history and current activity of the Earth by conducting seagoing coring expeditions and monitoring of instrumented boreholes, using globally unique infrastructure that Australians would otherwise have no access to. Program outcomes include understanding past global environmental change on multiple time scales, the deep biosphere, plate tectonics, formation and distribution of resources, and generation of hazards. These outcomes are paramount to Australia’s national science and research priorities, and societal and economic prosperity.Read moreRead less
Dating West Antarctic ice sheet collapse using molecular sequence data. This project aims to investigate the past stability and configuration of the West Antarctic Ice Sheet by examining genomic signatures in present day bottom-dwelling Antarctic marine animals. By employing this novel biological approach this project will provide an independent test of the hypothesis that the West Antarctic Ice Sheet collapsed during the most recent interglacial period and formed a trans-Antarctic seaway. Expec ....Dating West Antarctic ice sheet collapse using molecular sequence data. This project aims to investigate the past stability and configuration of the West Antarctic Ice Sheet by examining genomic signatures in present day bottom-dwelling Antarctic marine animals. By employing this novel biological approach this project will provide an independent test of the hypothesis that the West Antarctic Ice Sheet collapsed during the most recent interglacial period and formed a trans-Antarctic seaway. Expected project outcomes include increased resolution of the most recent collapse of the West Antarctic Ice Sheet. This project should provide benefits in predicting future ice sheet collapse and its impact on sea level rise, which is a key uncertainty resulting from climate change.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE240100064
Funder
Australian Research Council
Funding Amount
$193,125.00
Summary
Sediment Drilling Facility for environmental and genetic archives. This Sediment Drilling Facility for Environmental and Genetic Archives combines versatile augers with new field spectrometers that will enable sediment extraction and rapid, in situ measurements from coastal, lake and riverine environments. The facility includes a compact geotechnical drill rig, a portable power auger with hydraulic extraction unit, a vibracorer with motorised pontoon, laser induced breakdown spectrometer and ma ....Sediment Drilling Facility for environmental and genetic archives. This Sediment Drilling Facility for Environmental and Genetic Archives combines versatile augers with new field spectrometers that will enable sediment extraction and rapid, in situ measurements from coastal, lake and riverine environments. The facility includes a compact geotechnical drill rig, a portable power auger with hydraulic extraction unit, a vibracorer with motorised pontoon, laser induced breakdown spectrometer and magnetic susceptibility. With access co-ordinated through the Queensland Geochronology Alliance, the new facility will enable university researchers unprecedented access to field equipment required to address questions about changing ecology, landscape and climate on recent and geological timescales. Read moreRead less
Past climate and environmental impacts on Great Barrier Reef paleoecology. This project aims to investigate the interconnected processes that led to past reef growth and demise. The iconic Great Barrier Reef and reefs globally are under threat. Yet reefs appear to have undergone cycles of death and recovery, though the causes are poorly understood. This project will reconstruct past climate, rainfall, water quality, coral bleaching and reef ecology feedbacks across Great Barrier Reef death event ....Past climate and environmental impacts on Great Barrier Reef paleoecology. This project aims to investigate the interconnected processes that led to past reef growth and demise. The iconic Great Barrier Reef and reefs globally are under threat. Yet reefs appear to have undergone cycles of death and recovery, though the causes are poorly understood. This project will reconstruct past climate, rainfall, water quality, coral bleaching and reef ecology feedbacks across Great Barrier Reef death events to establish which environmental stressors and paleoclimate variations are most critical for reef health. The outcomes will better constrain long term coral reef dynamics and provide significant benefits to those who manage reefs globally, since the Great Barrier Reef covers the full range of reef environments.Read moreRead less
Millennial climate change in southern Australia during the Last Glacial. Abrupt warming and cooling events were a persistent feature of Earth's most recent climate cycle. Surprisingly, little is known of how these events affected the climate of Australia. This project will produce precisely dated reconstructions of rainfall and temperature trends in southern Australia during these events. These new terrestrial and ocean data will be compared with model simulations to determine how rapidly abrupt ....Millennial climate change in southern Australia during the Last Glacial. Abrupt warming and cooling events were a persistent feature of Earth's most recent climate cycle. Surprisingly, little is known of how these events affected the climate of Australia. This project will produce precisely dated reconstructions of rainfall and temperature trends in southern Australia during these events. These new terrestrial and ocean data will be compared with model simulations to determine how rapidly abrupt climate perturbations in the Northern Hemisphere reached our region, and the processes by which this occurred. The results will advance theory on how abrupt climate change propagates globally and provide a long-awaited climatic context for capstone events in Australia's natural history.Read moreRead less
Unlocking the environmental archives of the Kimberley’s past. This project aims to reconstruct the environmental history of Australia’s Kimberley region spanning the past 60,000 years. Through a multidisciplinary approach, the project will provide new understanding of the causes of environmental change and impacts on this region since the arrival of Australia’s earliest inhabitants. This will inform the development of conservation policy to ensure preservation of the region's globally significan ....Unlocking the environmental archives of the Kimberley’s past. This project aims to reconstruct the environmental history of Australia’s Kimberley region spanning the past 60,000 years. Through a multidisciplinary approach, the project will provide new understanding of the causes of environmental change and impacts on this region since the arrival of Australia’s earliest inhabitants. This will inform the development of conservation policy to ensure preservation of the region's globally significant rock art against environmental change and economic development.
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East Australian climate extremes through the Holocene. The project aims to document climate variability in eastern Australia over the Holocene, the last 11,500 years. It seeks to develop Australia’s two highest-resolution Holocene climate records using novel techniques to infer past rainfall, temperature and evaporation. The project will combine the expertise of international drought and climate specialists with novel techniques developed by the Australian investigators to derive an unparalleled ....East Australian climate extremes through the Holocene. The project aims to document climate variability in eastern Australia over the Holocene, the last 11,500 years. It seeks to develop Australia’s two highest-resolution Holocene climate records using novel techniques to infer past rainfall, temperature and evaporation. The project will combine the expertise of international drought and climate specialists with novel techniques developed by the Australian investigators to derive an unparalleled record of drought duration, frequency and intensity. In particular, the project aims to determine the frequency, duration and causes of mega-droughts in eastern Australia, of which little is known. Expected project outcomes include improved decision making capacity for natural resource management, and planning.Read moreRead less
Resolving the Maya climate-collapse hypothesis. This project aims to test the climate-collapse theory by developing detailed records of climate and social change from Maya cities that did not collapse, and in doing so identify why some cities were more resilient to the impact of climatic variability than others. Catastrophic climate variability is often invoked to explain the historic collapse of large low-density urban centres in the global tropics. The collapse of the Maya civilisation of Cent ....Resolving the Maya climate-collapse hypothesis. This project aims to test the climate-collapse theory by developing detailed records of climate and social change from Maya cities that did not collapse, and in doing so identify why some cities were more resilient to the impact of climatic variability than others. Catastrophic climate variability is often invoked to explain the historic collapse of large low-density urban centres in the global tropics. The collapse of the Maya civilisation of Central America after the 8th century AD is the archetypal social collapse yet, despite robust evidence for drought across Central America, archaeological evidence suggests a heterogenous social response. This project will reveal what social, material, or environmental properties facilitated resiliency in historic urban centres confronting climatic variability.Read moreRead less
Fire and rain: Drivers of deep-time ecosystem assembly in Australia. This project aims to investigate the influence of bushfires and shifting rainfall patterns on the development of Australia’s dominant ecosystems. By combining a range of novel geochemical, isotopic and palaeontological techniques, this research seeks to reveal the causes and consequences of Australia’s transformation from a forested to mainly open landscape of grassland, shrubland and savannah. The expected outcome is detailed ....Fire and rain: Drivers of deep-time ecosystem assembly in Australia. This project aims to investigate the influence of bushfires and shifting rainfall patterns on the development of Australia’s dominant ecosystems. By combining a range of novel geochemical, isotopic and palaeontological techniques, this research seeks to reveal the causes and consequences of Australia’s transformation from a forested to mainly open landscape of grassland, shrubland and savannah. The expected outcome is detailed knowledge of how changes in fire and rain shaped the ecology and evolution of plants and animals. This knowledge is key to understanding how Australian ecosystems function and to protecting their cultural, economic and environmental values, especially as climate and fire regimes continue to change into the future.Read moreRead less