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Flooding in Australia – are we properly prepared for how bad it can get? This project aims to investigate how floods have varied over the past 2000 years. Floods are a recurrent and natural part of Australia’s hydroclimate and are influenced strongly by climate variability. However, these influences are not yet completely understood or accounted for. This project will use novel insights from 2000 years of climate reconstructions to generate new knowledge about how bad flooding can get and what c ....Flooding in Australia – are we properly prepared for how bad it can get? This project aims to investigate how floods have varied over the past 2000 years. Floods are a recurrent and natural part of Australia’s hydroclimate and are influenced strongly by climate variability. However, these influences are not yet completely understood or accounted for. This project will use novel insights from 2000 years of climate reconstructions to generate new knowledge about how bad flooding can get and what causes flood frequency to change over time. A decision-making framework that allows for all the uncertainties associated with managing floods will also be developed. This will provide a critical evaluation of the accuracy of existing flood estimates, and also the reliability of infrastructure and policy based on those estimates.Read moreRead less
Annual temperature variability and abrupt climate change over the Holocene. This project intends to generate a near-continuous annual temperature reconstruction for the past 10 000 years using low-elevation Huon pine from south-western Tasmania. The unprecedented length and temporal resolution of the reconstruction would offer new insights into temperature variability at decadal, centennial, and millennial time scales and establish a unique record describing the nature, timing, and intensity of ....Annual temperature variability and abrupt climate change over the Holocene. This project intends to generate a near-continuous annual temperature reconstruction for the past 10 000 years using low-elevation Huon pine from south-western Tasmania. The unprecedented length and temporal resolution of the reconstruction would offer new insights into temperature variability at decadal, centennial, and millennial time scales and establish a unique record describing the nature, timing, and intensity of abrupt temperature changes associated with known events in the palaeoclimate record. The detailed understanding of historical temperature variability and past abrupt climate change provided by the tree-ring record would provide a historical context for recent and future climate variability.Read moreRead less
The divergence phenomenon in tree-ring-reconstructed temperatures: global problem or Northern Hemisphere anomaly? Concerns about recent global warming derive from comparisons of current temperatures and past temperatures reconstructed mainly from tree-rings. There is some evidence that tree-rings are becoming less sensitive to temperature at some high-latitude sites. The project will determine the scale and extent of this problem across the Southern Hemisphere.
New insights into abrupt climate change using isotope model-data fusion. There have been several episodes in the past 60,000 years during which carbon dioxide was released into the atmosphere causing significant and rapid warming. This project aims to determine the source of the carbon responsible for these warming events. This project is significant because it will increase our understanding of the processes underlying abrupt past, and potential future changes. These processes are currently und ....New insights into abrupt climate change using isotope model-data fusion. There have been several episodes in the past 60,000 years during which carbon dioxide was released into the atmosphere causing significant and rapid warming. This project aims to determine the source of the carbon responsible for these warming events. This project is significant because it will increase our understanding of the processes underlying abrupt past, and potential future changes. These processes are currently underestimated or missing in climate models. The expected outcomes include a better understanding of the non-linear responses in the climate system. This should provide significant benefits, such as an assessment of whether the smooth climate changes currently projected through to year 2100 are misleading.Read moreRead less
Understanding interglacial diversity. This project intends to improve our understanding of interglacial processes. Interglacials, the relatively brief warm intervals of Quaternary ice-age cycles, have varied significantly over the last 800 000 years in terms of their duration, timing, intensity and complexity. The reason for such diversity has eluded palaeoclimatologists for decades. This is because of the difficulty of dating marine and ice records, which best preserve interglacial histories. T ....Understanding interglacial diversity. This project intends to improve our understanding of interglacial processes. Interglacials, the relatively brief warm intervals of Quaternary ice-age cycles, have varied significantly over the last 800 000 years in terms of their duration, timing, intensity and complexity. The reason for such diversity has eluded palaeoclimatologists for decades. This is because of the difficulty of dating marine and ice records, which best preserve interglacial histories. The projects plans to compile precisely dated time series of past interglacials that can be linked directly to these records, allowing robust comparisons between interglacial properties and changes in Earth's astronomical parameters. This would advance palaeoclimate theory and provide a new perspective on the future evolution of the climate system.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
New insights on the forcing of Quaternary ice-age terminations. This project investigates the period when Earth's climate last experienced a major step change. Using novel techniques, it combines information from an exceptional archive of cave deposits and ocean sediments to precisely determine the timing of ice-age cycles. The results will provide the first robust test of hypotheses proposed to explain these cycles, leading to refinements in the astronomical theory of the ice ages. They will al ....New insights on the forcing of Quaternary ice-age terminations. This project investigates the period when Earth's climate last experienced a major step change. Using novel techniques, it combines information from an exceptional archive of cave deposits and ocean sediments to precisely determine the timing of ice-age cycles. The results will provide the first robust test of hypotheses proposed to explain these cycles, leading to refinements in the astronomical theory of the ice ages. They will also provide an essential reference record of Northern Hemisphere ice-sheet history, which will complement data from forthcoming Antarctic ice cores. Together, this will better contextualise current and projected greenhouse warming.Read moreRead less
Australian Laureate Fellowships - Grant ID: FL120100050
Funder
Australian Research Council
Funding Amount
$3,079,069.00
Summary
Sea level change and climate sensitivity. This project will aim to improve understanding of climate and sea-level change on timescales relevant to longer-term planning, by characterising the relationship between past sea-level/ice-volume change and other key climate factors such as temperature and greenhouse gases, and by quantifying how rapidly sea level may adjust to climate change.
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
When the ice melts: a new perspective on the causes of Quaternary glacial terminations. The project will assemble an unprecedented palaeoclimate time series extending back to 1.2 million years ago that will allow marine and ice core records to be placed onto an absolute time scale. This will allow testing of fundamental hypotheses on why the Earth's climate shifts from glacial to interglacial states, with flow-on effects to climate models.