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Water exchange and mixing at the aquifer-ocean interface. Submarine groundwater discharge (SGWD) has been identified by International Geosphere-Biosphere Programme as an important contamination source for coastal marine and estuarine environments. Nutrient input associated with SGWD is threatening the Great Barrier Reef. Water exchange driven by tides/waves at the shore contributes to SGWD significantly. However, no data of the water exchange rates exist. This project will measure time-varying g ....Water exchange and mixing at the aquifer-ocean interface. Submarine groundwater discharge (SGWD) has been identified by International Geosphere-Biosphere Programme as an important contamination source for coastal marine and estuarine environments. Nutrient input associated with SGWD is threatening the Great Barrier Reef. Water exchange driven by tides/waves at the shore contributes to SGWD significantly. However, no data of the water exchange rates exist. This project will measure time-varying groundwater flow and salinity distribution in the intertidal zone at two beaches to study near-shore water exchange and mixing. These unique data, providing basis for developing SGWD models, will improve the understanding and quantification of subsurface chemical fluxes to coastal waters.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0560828
Funder
Australian Research Council
Funding Amount
$363,288.00
Summary
Hydrodynamics and water quality field research facility. Understanding the fate of sediments and contaminants transported through catchments and the marine environment and their impacts on aquatic and marine ecosystems requires detailed hydrodynamic understanding at a range of scales. By establishing a state of the art research facility, JCU and GU together have a unique opportunity to provide hydrodynamic and water quality research which will support research priority areas of both institutions ....Hydrodynamics and water quality field research facility. Understanding the fate of sediments and contaminants transported through catchments and the marine environment and their impacts on aquatic and marine ecosystems requires detailed hydrodynamic understanding at a range of scales. By establishing a state of the art research facility, JCU and GU together have a unique opportunity to provide hydrodynamic and water quality research which will support research priority areas of both institutions, and advance the understanding of Australia's important tropical and subtropical ecosystems. Currently, excellent researchers and novel collaborations between and within James Cook University and Griffith University, are restricted by the lack of essential modern equipment.Read moreRead less
Beach groundwater dynamics: measurement and modelling. Beach groundwater is a highly complex, dynamic system interacting with tides, waves and swash. Such interactions affect beach sediment movement and contaminant transport/transformation in coastal aquifers. This project aims to measure and model the groundwater's behaviour at three different types of beaches: sand, gravel and gravel-sand mixed beaches. The study will provide much needed understanding and quantification of the beach groundwate ....Beach groundwater dynamics: measurement and modelling. Beach groundwater is a highly complex, dynamic system interacting with tides, waves and swash. Such interactions affect beach sediment movement and contaminant transport/transformation in coastal aquifers. This project aims to measure and model the groundwater's behaviour at three different types of beaches: sand, gravel and gravel-sand mixed beaches. The study will provide much needed understanding and quantification of the beach groundwater dynamics over a range of time scales. The outcome will help to assess the extent and intensity of mass and momentum exchanges across the beach face, and the resulting effects on beach stability and the fate of contaminants in coastal aquifers.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
Tropical sand beach ridges - a new approach to palaeotempestology. Investigations of sand beach ridges in northern Australia will considerably reduce the impact of future tropical cyclones on communities. These ridges record a detailed history of cyclones over the past 5,000 years. Due to the great length of record we will now be able to identify cycles of cyclone activity, which will allow us to better predict the consequences of these hazards under an enhanced greenhouse climate and reduce the ....Tropical sand beach ridges - a new approach to palaeotempestology. Investigations of sand beach ridges in northern Australia will considerably reduce the impact of future tropical cyclones on communities. These ridges record a detailed history of cyclones over the past 5,000 years. Due to the great length of record we will now be able to identify cycles of cyclone activity, which will allow us to better predict the consequences of these hazards under an enhanced greenhouse climate and reduce the threat to human life and economic loss.Read moreRead less
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
Quantifying the pathways and fluxes of iron to Moreton Bay. Recent investigations into the blooms of Lyngbya majuscula in Moreton Bay have identified dissolved iron, phosphorus and humic substances as important triggers of blooms. These chemicals are most likely sourced from land activities and transported by surface and ground water into the bay. Quantification of the groundwater discharge and associated chemical input to the bay has been identified by the Lyngbya Scientific Panel and the Lyng ....Quantifying the pathways and fluxes of iron to Moreton Bay. Recent investigations into the blooms of Lyngbya majuscula in Moreton Bay have identified dissolved iron, phosphorus and humic substances as important triggers of blooms. These chemicals are most likely sourced from land activities and transported by surface and ground water into the bay. Quantification of the groundwater discharge and associated chemical input to the bay has been identified by the Lyngbya Scientific Panel and the Lyngbya Management Steering Committee as a key issue for future Lyngbya scientific investigations. This project aims to investigate and quantify both surface and subsurface pathways and fluxes of iron to the bay.Read moreRead less
The Australian Dust Transport System: characterisation and downwind impacts. Most Australians are aware that dust storms occur in dry inland areas and recently many experienced first hand, the dust storms that engulfed our cities. Few, however, are aware of the diverse impacts of desert dust downwind from source. Recent technological advances in remote sensing have made dust storms much easier to study, and Australian researchers will use these, and other innovative techniques, to reconstruct th ....The Australian Dust Transport System: characterisation and downwind impacts. Most Australians are aware that dust storms occur in dry inland areas and recently many experienced first hand, the dust storms that engulfed our cities. Few, however, are aware of the diverse impacts of desert dust downwind from source. Recent technological advances in remote sensing have made dust storms much easier to study, and Australian researchers will use these, and other innovative techniques, to reconstruct the major dust storms back to 1960. They will reconstruct the sources, dust loads and trajectories of these storms, and examine how dust affects urban air pollution. Their data will also be provided to an allied research team in New Zealand, who are examining how iron-rich Australia dust affects phytoplankton in the oceans.Read moreRead less
Changes of salt dynamics and distribution in coastal marshes. This project aims to determine and quantify key mechanisms underlying salt transport and distribution in coastal salt marshes. Combining field measurements, laboratory experiments and numerical simulations, the proposed research will tackle long-standing questions concerning accumulation of excessive salt in the marsh soil, which imposes significant stress on marsh plants. This project will examine how temporal and spatial salinity va ....Changes of salt dynamics and distribution in coastal marshes. This project aims to determine and quantify key mechanisms underlying salt transport and distribution in coastal salt marshes. Combining field measurements, laboratory experiments and numerical simulations, the proposed research will tackle long-standing questions concerning accumulation of excessive salt in the marsh soil, which imposes significant stress on marsh plants. This project will examine how temporal and spatial salinity variations lead to large density gradients that may trigger unstable pore-water flow and solute transport. The outcomes will advance our understanding of fundamental links between the marsh hydrology and ecology, and improve our scientific basis for evaluating the marsh ecosystem under different stress conditions.Read moreRead less
Geomorphological development of coral reefs, southern Great Barrier Reef: an integrated record of Holocene palaeoecology and palaeoclimate from cores. Very little is known about how the Great Barrier Reef (GBR) has responded or may respond to predicted environmental change and/or degradation. The project will reconstruct the recent biological and physical history of reefs in the southern GBR in order to better understand how they may react to future environmental changes.