Pyrogenic carbon sequestration in Australian soils. Pyrogenic Carbon ('charcoal') is a poorly understood component of the global carbon cycle, important because it is resistant to degradation and hence has potential soil carbon sequestration benefits. This project applies a new technique (hydrogen pyrolysis), in combination with spectroscopic techniques, to quantify charcoal in a pan-Australian soil sample set, collected using uniform stratified sampling and preparation protocols. This will ena ....Pyrogenic carbon sequestration in Australian soils. Pyrogenic Carbon ('charcoal') is a poorly understood component of the global carbon cycle, important because it is resistant to degradation and hence has potential soil carbon sequestration benefits. This project applies a new technique (hydrogen pyrolysis), in combination with spectroscopic techniques, to quantify charcoal in a pan-Australian soil sample set, collected using uniform stratified sampling and preparation protocols. This will enable the mapping of soil charcoal stocks in relation to environmental and soil variables across Australia. The results will enable understanding of the controls on charcoal sequestration potential in Australian soils and contribute to efforts to quantify soil charcoal stocks and dynamics globally.Read moreRead less
Up in smoke and out to sea? Carbon, water and land use change in savanna. This project aims to improve our understanding of carbon cycling in natural and transformed savannas. It seeks to resolve a large discrepancy in savanna carbon sink size as measured by flux towers compared to long-term direct measures of carbon stock change. This would improve our fundamental understanding of carbon balances (gains/losses) and residence times in these dynamic ecosystems. The long-term impacts of these land ....Up in smoke and out to sea? Carbon, water and land use change in savanna. This project aims to improve our understanding of carbon cycling in natural and transformed savannas. It seeks to resolve a large discrepancy in savanna carbon sink size as measured by flux towers compared to long-term direct measures of carbon stock change. This would improve our fundamental understanding of carbon balances (gains/losses) and residence times in these dynamic ecosystems. The long-term impacts of these land use changes on carbon storage are poorly understood, therefore this new knowledge is vital in determining the viability of 'carbon farming' in these landscapes. More accurate information would guide improved land management given the intensification of land use, weed invasion and fire regime change in northern Australia.Read moreRead less
Will soil carbon burial Increase in mangrove wetlands? The aim of this project is to investigate carbon burial in mangroves during current and historical climatic conditions through in depth dating methods and paleoclimate reconstructions. The project intends to use state-of-the-art radionuclide tracer technologies to determine system scale aspects of the mangrove carbon budget, i.e. burial, tidal export and respiration. This project is significant because it aims to delineate how climatic condi ....Will soil carbon burial Increase in mangrove wetlands? The aim of this project is to investigate carbon burial in mangroves during current and historical climatic conditions through in depth dating methods and paleoclimate reconstructions. The project intends to use state-of-the-art radionuclide tracer technologies to determine system scale aspects of the mangrove carbon budget, i.e. burial, tidal export and respiration. This project is significant because it aims to delineate how climatic conditions are directly related to the mangrove carbon budget. Further, the site specific data on historical mangrove carbon burial could allow adaptation strategies for use of coastal wetland habitats that sequester CO2, a natural means to help ameliorate greenhouse gas, as support for mangrove forest protection and restoration.Read moreRead less
Water and soil resource response to past global environmental changes. The abundance and distribution of Earth's water and soil resources are strongly influenced by the spatial and temporal variability of climatic parameters. Thus, there is a need to understand how climate change, whether of natural causes or induced by human activity, impacts fluvial and soil systems. This project will use novel isotopic techniques to study the links between climate variability, chemical weathering, which produ ....Water and soil resource response to past global environmental changes. The abundance and distribution of Earth's water and soil resources are strongly influenced by the spatial and temporal variability of climatic parameters. Thus, there is a need to understand how climate change, whether of natural causes or induced by human activity, impacts fluvial and soil systems. This project will use novel isotopic techniques to study the links between climate variability, chemical weathering, which produces soil, and sediment transport, which affects fluvial systems and water resources. The composition of stable lithium, boron and calcium isotopes, and of radioactive uranium-series isotopes in sedimentary records will shed new light on our understanding of these processes.Read moreRead less