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Assessing clouds and rainfall in Australia's community climate model - Towards an improved simulation of Australia's water resources. Climate change is likely to significantly affect Australia's water resources. A well-measured response to this challenge requires reliable projections of future climate using modern Earth System Models. By thoroughly evaluating Australia's community climate model this research will inform Australia's adaptation policy and through subsequent model development it wi ....Assessing clouds and rainfall in Australia's community climate model - Towards an improved simulation of Australia's water resources. Climate change is likely to significantly affect Australia's water resources. A well-measured response to this challenge requires reliable projections of future climate using modern Earth System Models. By thoroughly evaluating Australia's community climate model this research will inform Australia's adaptation policy and through subsequent model development it will contribute to significant improvements in our ability to understand and predict climate change. Through better informing water resource management the research constitutes an important contribution to an environmentally sustainable Australia. Read moreRead less
Causes of Enhanced Warming of the Southern Ocean. The Southern Ocean is critical to the global climate system in general, and Australian climate in particular. However, the Southern Ocean is poorly understood, poorly observed and poorly modelled by global climate models. The response of the Southern Ocean to increases in wind forcing (due to the ozone hole and global warming) will be examined. Climate impacts such as Australian rainfall trends, potential instability of the West Antarctic Ice She ....Causes of Enhanced Warming of the Southern Ocean. The Southern Ocean is critical to the global climate system in general, and Australian climate in particular. However, the Southern Ocean is poorly understood, poorly observed and poorly modelled by global climate models. The response of the Southern Ocean to increases in wind forcing (due to the ozone hole and global warming) will be examined. Climate impacts such as Australian rainfall trends, potential instability of the West Antarctic Ice Sheet and changes to the global overturning circulation will be quantified. Understanding these impacts will help to manage Australia's water resources and to predict the future Southern Ocean circulation.Read moreRead less
Sensitivity and Change in the Global Ocean Overturning. The dynamics of the global, deep overturning circulation in the oceans and the way this adjusts to increasing greenhouse forcing will be examined in order to improve our conceptual knowledge of the oceans and the accuracy of climate models. By understanding how the ocean responds to changing surface heat and freshwater fluxes, and particularly the global role of rapid changes in high-latitude seas, we aim to help refine estimates of climate ....Sensitivity and Change in the Global Ocean Overturning. The dynamics of the global, deep overturning circulation in the oceans and the way this adjusts to increasing greenhouse forcing will be examined in order to improve our conceptual knowledge of the oceans and the accuracy of climate models. By understanding how the ocean responds to changing surface heat and freshwater fluxes, and particularly the global role of rapid changes in high-latitude seas, we aim to help refine estimates of climate response times and the warming expected for a given increase in atmospheric greenhouse gases. These two important characteristics of the climate system underlie climate change policy decisions.Read moreRead less
Nonhydrostatic waves and instabilities in rotating fluids. This project addresses a fundamental gap in our understanding of the ocean circulation. The benefits of the program will be to improve the way we model and predict the ocean circulation and the response of the ocean to climate change. The project will thereby assist National Research Priorities on global change and link with a major new ANU Marine Science Strategic Initiative.
From The Ocean Depths To Abrupt Climate Change - Missing Processes In The Global Overturning Circulation. The overturning circulation of the oceans is a driver of large and surprisingly abrupt climate shifts. We aim to understand the factors that control the rate of overturning, and whether it might soon slow down or cease owing to global warming. We also aim to resolve one of the biggest conundrums in oceanography by reconciling theoretical and measured rates of mixing in the deep ocean. Improv ....From The Ocean Depths To Abrupt Climate Change - Missing Processes In The Global Overturning Circulation. The overturning circulation of the oceans is a driver of large and surprisingly abrupt climate shifts. We aim to understand the factors that control the rate of overturning, and whether it might soon slow down or cease owing to global warming. We also aim to resolve one of the biggest conundrums in oceanography by reconciling theoretical and measured rates of mixing in the deep ocean. Improved knowledge of deep ocean dynamics, particularly in the Southern Ocean, will help us gauge the likely nature and pace of imminent climate changes in the Australian region, an essential step in assessing the impacts on water resources, ecosystems, agriculture, and energy demands. The research will add to a major new initiative in marine science at ANU.Read moreRead less
Mixing and dissipation in the ocean: Processes for the next generation of climate models. The circulation of the oceans is a crucial factor in governing the variability and long-term change in the earth's climate. A major weakness in current ocean and climate models is a lack of knowledge of energy flow within the ocean. This project will examine the nature and role of eddy interactions with the ocean boundaries, which is a critical question for future development of more accurate high-resolutio ....Mixing and dissipation in the ocean: Processes for the next generation of climate models. The circulation of the oceans is a crucial factor in governing the variability and long-term change in the earth's climate. A major weakness in current ocean and climate models is a lack of knowledge of energy flow within the ocean. This project will examine the nature and role of eddy interactions with the ocean boundaries, which is a critical question for future development of more accurate high-resolution ocean models and improved climate predictions.Read moreRead less
What controls the shift from a hot house climate to a cold house climate: the Eocene/ Oligocene climate transition and greenhouse warming. This study contributes to putting Australia on the map as a centre of excellence in the study of past climates as well as in global warming research. It aims at a greater understanding of the dynamics of past warm climate states. This could ultimately lead to a better knowledge of the formation of the ancient deposits that we mine in Australia today. Furtherm ....What controls the shift from a hot house climate to a cold house climate: the Eocene/ Oligocene climate transition and greenhouse warming. This study contributes to putting Australia on the map as a centre of excellence in the study of past climates as well as in global warming research. It aims at a greater understanding of the dynamics of past warm climate states. This could ultimately lead to a better knowledge of the formation of the ancient deposits that we mine in Australia today. Furthermore, the study of these past warm climates tells us something about current global warming as both involve increased levels of carbon in the atmosphere. The impact of climate change on Australia is likely to be large. Our study of past warm climates helps to gain an understanding of the mechanisms behind climate change and help quantify the risks of climate change posed to Australia.Read moreRead less
The equable climate conundrum: the role of the global ocean in multiple climate regimes. This study will enhance Australia's global engagement in the research of past climates and global warming, and lead to a better understanding of the dynamics and modelling of warm climate states. This will contribute significantly to climate research in Australia and could lead to a better knowledge of the formation of the ancient deposits that we mine today. Furthermore, the study of past warm climates tel ....The equable climate conundrum: the role of the global ocean in multiple climate regimes. This study will enhance Australia's global engagement in the research of past climates and global warming, and lead to a better understanding of the dynamics and modelling of warm climate states. This will contribute significantly to climate research in Australia and could lead to a better knowledge of the formation of the ancient deposits that we mine today. Furthermore, the study of past warm climates tells us something about current global warming, as both involve increased levels of carbon in the atmosphere. The impact of climate change on Australia is likely to be large. This study of past warm climates will improve our understanding of climate change physics and help quantify the risks of climate change posed to Australia.Read moreRead less
Integrated Ocean Drilling Program (IODP) drilling in the Great Barrier Reef: unlocking the causes, rates and consequences of abrupt sea level and climate change. The Great Barrier Reef (GBR) and how it will respond to future global climate changes is of fundamental importance to the nation. The project will address this challenge by investigating the submerged fossil coral reefs in the GBR. This will lead to a better understanding of the natural rates, range and forcing mechanisms that control g ....Integrated Ocean Drilling Program (IODP) drilling in the Great Barrier Reef: unlocking the causes, rates and consequences of abrupt sea level and climate change. The Great Barrier Reef (GBR) and how it will respond to future global climate changes is of fundamental importance to the nation. The project will address this challenge by investigating the submerged fossil coral reefs in the GBR. This will lead to a better understanding of the natural rates, range and forcing mechanisms that control global sea-level and climate variability (ie. paleo-ENSO), and geo-biological changes affecting the GBR over the last 20,000 years. This project will provide unique insights into the response of the GBR to past environmental stress and improve predictions about the vulnerability of GBR to future global climate changes.Read moreRead less
Impact of land use on cloud formation. Large scale land clearing has the potential to significantly modify regional climates yet current climate models do not incorporate an adequate representation of the land surface. Within Western Australia the rabbit fence provides a unique environment in which the interaction between the land surface and the atmosphere can be studied without other competing influences. A combination of satellite, aircraft and ground based observations will be used to relate ....Impact of land use on cloud formation. Large scale land clearing has the potential to significantly modify regional climates yet current climate models do not incorporate an adequate representation of the land surface. Within Western Australia the rabbit fence provides a unique environment in which the interaction between the land surface and the atmosphere can be studied without other competing influences. A combination of satellite, aircraft and ground based observations will be used to relate cloud formation to land characteristics and provide a clearer insight into the climatic impact of human-induced land surface changes.Read moreRead less