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Improving the physical understanding, numerical simulation and forecasts of severe storms and precipitation events over major Australian cities. This strategic research project will improve our physical understanding and numerical simulation of severe storms over major Australia cities, which underpins future improvements in the forecasts of such storms. It will add to the capability of households, local government and industry to better prepare for major rainfall, hail, wind and flood events.
Making Australia resilient to airborne infection transmission. The COVID-19 pandemic demonstrated that basic questions regarding how to minimise the risk of airborne infection transmission for any respiratory viruses remain unanswered, despite their frequency and huge social and economic costs. Therefore, this project aims to expand scientific knowledge and develop practical tools to improve the resilience of Australian indoor environments against airborne transmission of respiratory viruses. T ....Making Australia resilient to airborne infection transmission. The COVID-19 pandemic demonstrated that basic questions regarding how to minimise the risk of airborne infection transmission for any respiratory viruses remain unanswered, despite their frequency and huge social and economic costs. Therefore, this project aims to expand scientific knowledge and develop practical tools to improve the resilience of Australian indoor environments against airborne transmission of respiratory viruses. The outcomes of the project conducted by a multidisciplinary international team of collaborators will include: (i) quantitative knowledge on virus-laden aerosols from human expiration; and (ii) exposure and infection risk models and their application to typical indoor building and transport scenarios.Read moreRead less
Predicting pollutant dispersion within the CBD. The accidental or pre-meditated release of hazardous gases and aerosols within an urban environment are potentially threatening to human life and safety. Emergency responders require adequate information to quickly address these concerns yet the lack of detailed observations and the complex nature of the dispersion make this task difficult. This project will collect detailed observations of tracer dispersion within the Perth central business distri ....Predicting pollutant dispersion within the CBD. The accidental or pre-meditated release of hazardous gases and aerosols within an urban environment are potentially threatening to human life and safety. Emergency responders require adequate information to quickly address these concerns yet the lack of detailed observations and the complex nature of the dispersion make this task difficult. This project will collect detailed observations of tracer dispersion within the Perth central business district and combine these observations with multiscale modelling to redefine appropriate emergency response models as well as their limits. Such analysis will enhance mitigation strategies.Read moreRead less
Precipitation Events over Tasmania and their Response to Weather Modification. The ongoing cloud-seeding work undertaken by Hydro Tasmania will be investigated through a combination of fieldwork and numerical simulations. New instrumentation and advanced numerical models will allow this research to provide a new understanding of the precipitation events over Tasmania and their response to cloud seeding. This research will also explore the interaction between the background aerosol/pollution leve ....Precipitation Events over Tasmania and their Response to Weather Modification. The ongoing cloud-seeding work undertaken by Hydro Tasmania will be investigated through a combination of fieldwork and numerical simulations. New instrumentation and advanced numerical models will allow this research to provide a new understanding of the precipitation events over Tasmania and their response to cloud seeding. This research will also explore the interaction between the background aerosol/pollution level and the precipitation. Given the relatively pure nature of the air over Tasmania, this research will be of international interest. This research will also be of direct interest to Hydro Tasmania as insight gained into the precipitation events will allow us to optimise their cloud-seeding operation.Read moreRead less
Radar Studies of Rainfall with Applications to Forecasting. Weather watch radars are used to predict severe weather events, with echo strengths depending on the number of rain drops in the beam. With suitable calibration the echo intensities can be used to predict rainfall rates. In 2005 the Bureau of Meteorology will establish a new weather radar near Adelaide. We will compare rainfall estimates made with the new radar with results from a VHF profiler that accurately measures rain drop distribu ....Radar Studies of Rainfall with Applications to Forecasting. Weather watch radars are used to predict severe weather events, with echo strengths depending on the number of rain drops in the beam. With suitable calibration the echo intensities can be used to predict rainfall rates. In 2005 the Bureau of Meteorology will establish a new weather radar near Adelaide. We will compare rainfall estimates made with the new radar with results from a VHF profiler that accurately measures rain drop distributions and rainfall. The aim is to test the weather radar estimates of rainfall rates and their uncertainties. Outcomes will have applications in flood forecasting and hydrology.Read moreRead less
QUANTIFICATION OF INTERACTIONS DURING THE DISPERSION OF CORONA IONS AND AIRBORNE PARTICLES NEAR POWER LINES. Currently there is no method for quantification of concentration and dispersion of charged aerosols near high voltage power lines (HVPLs). However, hypothesis have been presented, but not yet proven scientifically, that residents of houses close to combustion sources such as highways or industrial plants and HVPLs may be subjected to health risk due to inhalation of charged aerosols. The ....QUANTIFICATION OF INTERACTIONS DURING THE DISPERSION OF CORONA IONS AND AIRBORNE PARTICLES NEAR POWER LINES. Currently there is no method for quantification of concentration and dispersion of charged aerosols near high voltage power lines (HVPLs). However, hypothesis have been presented, but not yet proven scientifically, that residents of houses close to combustion sources such as highways or industrial plants and HVPLs may be subjected to health risk due to inhalation of charged aerosols. The outcome of this project will be a model for quantitative assessment of the processes occurring during the transport and dispersion of corona ions and combustion aerosol, which will be a tool for predictive risk assessment and informed management of public resources in relation to power line design and maintenance.Read moreRead less
Innovative measurement and modelling of greenhouse fluxes at regional scales across Australia. Carbon dioxide accounts for around 60% of the enhanced greenhouse effect. This proposal aims to markedly improve knowledge of the exchange of carbon, mostly as CO2, between atmospheric, ocean and land-based reservoirs in the Australian region. This will be achieved through a suite of measurements using innovative technologies: satellite and ground based remote sensing as well in situ measurements at ....Innovative measurement and modelling of greenhouse fluxes at regional scales across Australia. Carbon dioxide accounts for around 60% of the enhanced greenhouse effect. This proposal aims to markedly improve knowledge of the exchange of carbon, mostly as CO2, between atmospheric, ocean and land-based reservoirs in the Australian region. This will be achieved through a suite of measurements using innovative technologies: satellite and ground based remote sensing as well in situ measurements at Darwin and on the Ghan railway from Darwin to Adelaide. The measurements will be used to constrain inverse models of the carbon cycle and significantly reduce uncertainties in regional carbon source estimates. These estimates will in turn be compared to the Australian National Greenhouse Gas Inventory for comparison and verification.Read moreRead less
Precise Atmospheric Density Correction Model Using Space Tracking Data for Accurate Debris Surveillance and Collision Warning. Our project will build new atmospheric density correction models (ADCMs) for accurate prediction of debris object and satellite orbits. This research will have tremendous impacts on realizing unaided debris laser ranging. An order of magnitude accuracy improvement to the ADCMs will lead to a significant breakthrough in space object tracking. The benefits of this research ....Precise Atmospheric Density Correction Model Using Space Tracking Data for Accurate Debris Surveillance and Collision Warning. Our project will build new atmospheric density correction models (ADCMs) for accurate prediction of debris object and satellite orbits. This research will have tremendous impacts on realizing unaided debris laser ranging. An order of magnitude accuracy improvement to the ADCMs will lead to a significant breakthrough in space object tracking. The benefits of this research are: it will put Australia in a leading position in the world on ADCM study; to maintain Australia's leading role in space surveillance and greatly enhanced operational capability & efficiency of Australian space tracking systems; and to contribute significantly to the space environment info management, e.g. accurate collision warning and space junk tracking.Read moreRead less
A low-cost water vapour profiler for the lower troposphere. Water vapour plays an important role in weather forecasting, as well as being the most important greenhouse gas. Its distribution is not known in sufficient detail for many aspects of predicting weather and climate change. With the Bureau of Meteorology we will develop a low-cost laser ranging system to measure the profile of water vapour in the lower atmosphere. A low-cost instrument can be placed at a sufficient number of locations ....A low-cost water vapour profiler for the lower troposphere. Water vapour plays an important role in weather forecasting, as well as being the most important greenhouse gas. Its distribution is not known in sufficient detail for many aspects of predicting weather and climate change. With the Bureau of Meteorology we will develop a low-cost laser ranging system to measure the profile of water vapour in the lower atmosphere. A low-cost instrument can be placed at a sufficient number of locations to significantly enhance weather forecasting and climate modelling. The instrument will be useful for detecting fog formation, measuring cloudbase heights and can be adapted for pollution detection and measurement.Read moreRead less
Understanding extreme wind gusts and associated risks in NSW. Wind gusts are rare bursts of high wind, often associated with thunderstorm outflows. They can do significant structural damage, and their rarity and small scale make prediction and risk assessment difficult. This proposal seeks to better understand and predict wind gusts and their impacts to aid in planning. The project aims to use past observations, modelling, and basic theory to show what conditions lead to wind gusts and how like ....Understanding extreme wind gusts and associated risks in NSW. Wind gusts are rare bursts of high wind, often associated with thunderstorm outflows. They can do significant structural damage, and their rarity and small scale make prediction and risk assessment difficult. This proposal seeks to better understand and predict wind gusts and their impacts to aid in planning. The project aims to use past observations, modelling, and basic theory to show what conditions lead to wind gusts and how likely they are to exceed key thresholds. It targets important scientific and practical issues such as the joint occurrence of gusts and high rainfall, role of gusts in contributing to dust and other airborne pollutants, impacts of gusts on subsequent storm activity, and gusts in a warming climate.Read moreRead less