Unravelling Western Australia's Stormy Past - A Precisely-Dated Sediment Record of Cyclones over the past 7000 years. Australia has a vast coastline, much of which is vulnerable to cyclone impact. Clearly, historical human experience does not comprehend what the climate system is capable of in terms of epic storms. Our effort to understand the storm risks of the past is complicated by the limited length of the instrumental record which reaches back only 150 years of European settlement in tropic ....Unravelling Western Australia's Stormy Past - A Precisely-Dated Sediment Record of Cyclones over the past 7000 years. Australia has a vast coastline, much of which is vulnerable to cyclone impact. Clearly, historical human experience does not comprehend what the climate system is capable of in terms of epic storms. Our effort to understand the storm risks of the past is complicated by the limited length of the instrumental record which reaches back only 150 years of European settlement in tropical areas of Australia. This project will reconstruct the history of storms and cyclones using sedimentary signatures in Western Australia over the past 7000 years to assess storm and cyclone risks under changing future climates in a regional context.Read moreRead less
Landscape evolution and palaeoclimates in Indonesia: environmental, faunal and archaeological implications. The influence of environmental and climatic changes on faunal (including human) populations is a pressing issue for Australian communities in environmentally sensitive areas. This project will address this issue by documenting how certain flora and fauna in Indonesia, our nearest northern neighbour, responded to environmental challenges. Revealing when humans first dispersed through the re ....Landscape evolution and palaeoclimates in Indonesia: environmental, faunal and archaeological implications. The influence of environmental and climatic changes on faunal (including human) populations is a pressing issue for Australian communities in environmentally sensitive areas. This project will address this issue by documenting how certain flora and fauna in Indonesia, our nearest northern neighbour, responded to environmental challenges. Revealing when humans first dispersed through the region and how they adapted to changing environmental conditions will also contribute to our understanding of the cultural heritage of Australia's indigenous settlers. This project will build on established collaborations with Indonesian researchers and pioneer new dating methodologies to further enhance Australia's place at the forefront of geochronology.Read moreRead less
Weathering History and Cenozoic Landscape Evolution in Northern Queensland and New Caledonia. Rates of rock weathering impose a major control on the CO2 global budget. Increased weathering rates consume atmospheric CO2, possibly resulting in cooler climates. We intend to determine rock weathering rates on similar lithologies currently placed on equatorial positions, Northeastern Australia and New Caledonia, but possibly differing in climatic history. Geochronology of continental weathering prof ....Weathering History and Cenozoic Landscape Evolution in Northern Queensland and New Caledonia. Rates of rock weathering impose a major control on the CO2 global budget. Increased weathering rates consume atmospheric CO2, possibly resulting in cooler climates. We intend to determine rock weathering rates on similar lithologies currently placed on equatorial positions, Northeastern Australia and New Caledonia, but possibly differing in climatic history. Geochronology of continental weathering profiles in the areas will permit correlating known paleoclimatic cycles, derived from the isotopic composition of ocean floor sediments, with the variation in continental weathering rates. This comparison will test current models proposing that cooling of Cenozoic climates results from increase rates of rock weathering.Read moreRead less
Environmental impacts of climate change in the Nile basin over the past 30,000 years. There is growing international and national concern over the possible environmental, economic and social impacts of global and regional climate change. This project brings together a multi-disciplinary team of internationally recognised research leaders and the resources they command to investigate the environmental impacts of climatic changes in the Nile basin over geologically recent times. The outcome will b ....Environmental impacts of climate change in the Nile basin over the past 30,000 years. There is growing international and national concern over the possible environmental, economic and social impacts of global and regional climate change. This project brings together a multi-disciplinary team of internationally recognised research leaders and the resources they command to investigate the environmental impacts of climatic changes in the Nile basin over geologically recent times. The outcome will be a more comprehensive understanding of how a major river system responds to global and regional climate change, and will provide an enhanced conceptual basis for anticipating how drainage systems such as the Murray-Darling could respond to future change.Read moreRead less
Palaeoclimatic and environmental significance of major Late Quaternary drainage contributions and disruptions in the Lake Eyre basin. This study will advance our knowledge of the most remarkable floods ever known to have occurred in Australia. They were associated with a vast aquatic ecosystem in what today is the barren northern end of the Flinders Ranges, a region of desert dunes and salt lakes. Remarkably, such wet conditions appear to have coincided with episodes of megafaunal extinction and ....Palaeoclimatic and environmental significance of major Late Quaternary drainage contributions and disruptions in the Lake Eyre basin. This study will advance our knowledge of the most remarkable floods ever known to have occurred in Australia. They were associated with a vast aquatic ecosystem in what today is the barren northern end of the Flinders Ranges, a region of desert dunes and salt lakes. Remarkably, such wet conditions appear to have coincided with episodes of megafaunal extinction and with the human occupation of Australia. The results will provide valuable information with which to better understand the the main global drivers of episodes of profound wetness and dryness in Australian climate. Read moreRead less
Palaeoclimate reconstruction in northwestern China. Records of climatic change between semi-arid regions of the two large continents, China and Australia, provide invaluable data on the manner in which the globe has responded to past environmental changes. Such reconstructions impose constraints on possible patterns of future change.
The visit by an established researcher in Prof. Sun Jiamin will provide new data (including new dates) on the evolution of lakes and dunefields in China, and on ....Palaeoclimate reconstruction in northwestern China. Records of climatic change between semi-arid regions of the two large continents, China and Australia, provide invaluable data on the manner in which the globe has responded to past environmental changes. Such reconstructions impose constraints on possible patterns of future change.
The visit by an established researcher in Prof. Sun Jiamin will provide new data (including new dates) on the evolution of lakes and dunefields in China, and on the climatic conditions which controlled them. The visit builds on and extends the established links between the Chinese Academy of Sciences and staff in the Melbourne University, School of Earth Sciences.
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Sea-level change in the Australasian region during the past 6000 years: Understanding the past to predict the future. Interactions of climate, ice, oceans, and solid earth result in complex variations sea level in time and space. This proposal develops a predictive understanding of this change through an interdisciplinary integration of geophysical theory and geologic observations. Focus is on the Australian area and on the present interglacial but the outcomes will be placed in a global frame. ....Sea-level change in the Australasian region during the past 6000 years: Understanding the past to predict the future. Interactions of climate, ice, oceans, and solid earth result in complex variations sea level in time and space. This proposal develops a predictive understanding of this change through an interdisciplinary integration of geophysical theory and geologic observations. Focus is on the Australian area and on the present interglacial but the outcomes will be placed in a global frame. Outcomes will include estimates of rates and amplitudes of sea-level change, of changes in ice volume, of land movements from isostatic and tectonic causes. It also provides the framework necessary for separating natural change from anthropogenic change during the recent past and for predicting future regional and global sea-level change on a century time scale.Read moreRead less
How green were our deserts? Evidence for Late Quaternary climate change and the source of water in the Lake Eyre basin. This project addresses the National Research Priority of Environmentally Sustainable Australia by examining evidence for what has controlled climate change and variable runoff in the vast Lake Eyre basin. It will provide evidence for why Australia, presently the world's driest inhabited continent, has as recently as medieval times supported large lakes holding many cubic kilome ....How green were our deserts? Evidence for Late Quaternary climate change and the source of water in the Lake Eyre basin. This project addresses the National Research Priority of Environmentally Sustainable Australia by examining evidence for what has controlled climate change and variable runoff in the vast Lake Eyre basin. It will provide evidence for why Australia, presently the world's driest inhabited continent, has as recently as medieval times supported large lakes holding many cubic kilometres of fresh water adjacent to the now-barren Flinders Ranges. It will show if this water had a tropical or temperate source, fundamental information for understanding Australia's past climate, and allow predictions of future climate to be based on firm evidence.Read moreRead less
Understanding global warming using long-term glacier retreat records. This project will determine the sensitivity of climate to future global warming, contributing to understanding one of the greatest problems facing humanity today. We will take an historic approach, determining the effects of the greatest global warming in Earth's recent history after the last ice age 20,000 years ago. By constructing well-dated, accurate records of glacier retreat at key locations, we will quantitatively estim ....Understanding global warming using long-term glacier retreat records. This project will determine the sensitivity of climate to future global warming, contributing to understanding one of the greatest problems facing humanity today. We will take an historic approach, determining the effects of the greatest global warming in Earth's recent history after the last ice age 20,000 years ago. By constructing well-dated, accurate records of glacier retreat at key locations, we will quantitatively estimate temperature change as the planet warmed. These findings will help us understand the future effects of global warming so that we are better prepared for the environmental and economic costs. Read moreRead less