Reconstructing changes in atmospheric circulation over the mid-latitudes of the Southern Hemisphere during the past 3000 years. The climate of the mid-latitudes of the southern hemisphere is of global significance and yet past changes have proved difficult to reconstruct due to the dearth of records. Working across the Southern Ocean region using tree rings, lake sediments and ice cores, the project will produce the first comprehensive reconstruction spanning the last 3000 years.
Environmental and cultural change along the Central Murray River. The aim of this project is to understand how past people in the riverine landscapes of the Murray-Darling Basin (MDB) were influenced by and adapted to environmental change. This will be achieved using a novel cross-disciplinary approach combining state-of-the-art palaeoenvironmental and archaeological methods. Indigenous people of the MDB have always been closely linked to rivers, however, over the period of human habitation flow ....Environmental and cultural change along the Central Murray River. The aim of this project is to understand how past people in the riverine landscapes of the Murray-Darling Basin (MDB) were influenced by and adapted to environmental change. This will be achieved using a novel cross-disciplinary approach combining state-of-the-art palaeoenvironmental and archaeological methods. Indigenous people of the MDB have always been closely linked to rivers, however, over the period of human habitation flows on these rivers were likely subject to changes that exceeded present-day variability. Understanding how these changes have impacted humans, offers clues on adaption to environmental change and aids in developing strategies for living with the inherently variable and vulnerable rivers in drylands.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200100890
Funder
Australian Research Council
Funding Amount
$427,082.00
Summary
Rapid climate change, early modern human dispersal, and Neanderthal demise. Why are we the only surviving human species? This project aims to investigate whether seasonal environmental changes associated with rapid climate change events played a role in the expansion of our own species and the demise of Neanderthals between 60,000-30,000 years ago. The project will generate quantitative, sub-seasonal records of past climate variability using novel multi-proxy analyses from key archaeological sit ....Rapid climate change, early modern human dispersal, and Neanderthal demise. Why are we the only surviving human species? This project aims to investigate whether seasonal environmental changes associated with rapid climate change events played a role in the expansion of our own species and the demise of Neanderthals between 60,000-30,000 years ago. The project will generate quantitative, sub-seasonal records of past climate variability using novel multi-proxy analyses from key archaeological sites, offering a framework for understanding early human responses to extreme climate fluctuations. This may inform our strategies for coping with future extreme scenarios. These unparalleled records will also provide data to test and refine climate models, enabling a better understanding of Earth’s climate system. Read moreRead less
Early African woodworking and tool use at the transition to modern humans. Our archaeological excavations and preliminary dating of Amanzi Springs (South Africa) to between 515,000 and 163,000 years ago shows that the site covers a critical time period that led to the origins of our species, Homo sapiens. Amanzi documents, in never before seen resolution, the technological leaps that our ancestors made during this transition. At ~400,000 years ago this includes the oldest evidence for woodworkin ....Early African woodworking and tool use at the transition to modern humans. Our archaeological excavations and preliminary dating of Amanzi Springs (South Africa) to between 515,000 and 163,000 years ago shows that the site covers a critical time period that led to the origins of our species, Homo sapiens. Amanzi documents, in never before seen resolution, the technological leaps that our ancestors made during this transition. At ~400,000 years ago this includes the oldest evidence for woodworking and tool use and >163,000 years ago the oldest heat treatment of rock to make stone tools. The organic preservation at the site means that we can reconstruct changing environment, linked to sea level changes and spring activity, for this period in the evolution of our ancestors at a level of detail not previously possibleRead moreRead less
Discovery Early Career Researcher Award - Grant ID: DE120102530
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
Are northern- and southern-hemisphere climates synchronised on orbital timescales? New insight into Earth's climate history. This project will generate a very high (1-100 year) resolution palaeoclimate record in order to test whether southern hemisphere ice age climate changes 1.5 million years ago were synchronised with the northern hemisphere. This will provide a critical test of theories on the mechanisms driving glacial- interglacial climate changes.
The application of clumped isotope thermometry to the terrestrial environment. Clumped-isotope geochemistry, a novel method for measuring the temperature of formation of carbonate minerals, will be applied to terrestrial materials (soil carbonates, lake deposits and speleothems) from Australia and New Zealand. The method relates the abundance or 'clumping' of rare isotopes (for example, carbon dioxide of mass 47 as carbon-13, oxygen-18, oxygen-16) extracted from carbonates to their formation tem ....The application of clumped isotope thermometry to the terrestrial environment. Clumped-isotope geochemistry, a novel method for measuring the temperature of formation of carbonate minerals, will be applied to terrestrial materials (soil carbonates, lake deposits and speleothems) from Australia and New Zealand. The method relates the abundance or 'clumping' of rare isotopes (for example, carbon dioxide of mass 47 as carbon-13, oxygen-18, oxygen-16) extracted from carbonates to their formation temperature and is independent of the oxygen-18:oxygen-16 value of the host water from which the mineral precipitated. The materials to be investigated span the Last Glacial-Interglacial Transition and will provide robust past temperature estimates and the delta-oxygen-18 values of waters, thereby permitting hydrological balances (for example, precipitation/evaporation) to be constructed. Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE210101923
Funder
Australian Research Council
Funding Amount
$411,073.00
Summary
Characteristics and controls of ice sheet loss on centennial timescales. This project aims to unearth the characteristics and controls of Antarctic ice sheet loss on timescales of 100s to 1000s of years. The polar ice sheets are getting smaller at an accelerating rate in response to a warming climate, but modern observations are not yet sufficient to determine whether current ice sheet loss marks the start of irreversible retreat. Through a combination of novel geological approaches and numerica ....Characteristics and controls of ice sheet loss on centennial timescales. This project aims to unearth the characteristics and controls of Antarctic ice sheet loss on timescales of 100s to 1000s of years. The polar ice sheets are getting smaller at an accelerating rate in response to a warming climate, but modern observations are not yet sufficient to determine whether current ice sheet loss marks the start of irreversible retreat. Through a combination of novel geological approaches and numerical ice-flow modelling, this project expects to generate new knowledge on the rates and magnitudes of ice sheet loss, and the processes that will dictate the amount of ice loss in this century and beyond. This work should be beneficial for managing the societal, economic and environmental impacts of future sea-level rise.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE180100185
Funder
Australian Research Council
Funding Amount
$464,531.00
Summary
Mass spectrometry for next generation isotope analysis of silicate minerals. This project aims to establish a facility for mass spectrometry and sample preparation to enhance Australian capacity to analyse the stable isotope composition of silicate minerals. The project seeks to implement innovations that will greatly enhance the use of stable isotopes in silicate minerals by increasing analytical throughput and reducing cost. This will provide better understanding of the trajectories of environ ....Mass spectrometry for next generation isotope analysis of silicate minerals. This project aims to establish a facility for mass spectrometry and sample preparation to enhance Australian capacity to analyse the stable isotope composition of silicate minerals. The project seeks to implement innovations that will greatly enhance the use of stable isotopes in silicate minerals by increasing analytical throughput and reducing cost. This will provide better understanding of the trajectories of environmental change, formation of mineral deposits and identifying trade networks in prehistoric societies.Read moreRead less
Sedimentary processes on sandy coasts in southern Australia. This project aims to reconstruct sedimentary processes and evolution of key coastal plains in southern Australia. These low-lying coasts, and the settlements and infrastructure on them, are vulnerable to inundation and shoreline erosion. Past behaviour of different types of coasts will be determined by combining innovative geospatial techniques to map morphology and past changes, geophysical imaging of stratigraphy and geochronology. T ....Sedimentary processes on sandy coasts in southern Australia. This project aims to reconstruct sedimentary processes and evolution of key coastal plains in southern Australia. These low-lying coasts, and the settlements and infrastructure on them, are vulnerable to inundation and shoreline erosion. Past behaviour of different types of coasts will be determined by combining innovative geospatial techniques to map morphology and past changes, geophysical imaging of stratigraphy and geochronology. The outcome will be models that explain responses to sediment availability, past storm history and sea-level changes. This will benefit sustainable coastal planning and management, providing geomorphological evidence to support erosion hazard assessments of these and adjacent coasts.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.