Tropical convection and its contribution to climate variability. This research will provide the necessary data to test and improve the representation of tropical convective clouds in weather forecast and climate simulation models. This will lead to more robust estimates of future climate change, and improved prediction of precipitation in the Australian tropics. This project will also provide training to undergraduate and postgraduate students in using modern computer models; such models will be ....Tropical convection and its contribution to climate variability. This research will provide the necessary data to test and improve the representation of tropical convective clouds in weather forecast and climate simulation models. This will lead to more robust estimates of future climate change, and improved prediction of precipitation in the Australian tropics. This project will also provide training to undergraduate and postgraduate students in using modern computer models; such models will be a key component of weather forecasting in the future.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
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
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
Monitoring and Predicting Frost Events in the Agricultural Area of WA. Frost is commonly ranked by farmers as the second most important climate risk after rainfall variability. Thus reliable nocturnal temperature forecasts are of paramount importance in understanding the potential for frost formation and enabling its timely prediction and detection. Such forecasts would allow appropriate active or passive management responses. Utilising the existing meteorological network of the Department of Ag ....Monitoring and Predicting Frost Events in the Agricultural Area of WA. Frost is commonly ranked by farmers as the second most important climate risk after rainfall variability. Thus reliable nocturnal temperature forecasts are of paramount importance in understanding the potential for frost formation and enabling its timely prediction and detection. Such forecasts would allow appropriate active or passive management responses. Utilising the existing meteorological network of the Department of Agriculture, this project aims to develop an integrated frost prediction system that will provide timely estimates of both the spatial and temporal extent of frost events for farmers and agribusiness.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
The dynamics and predictability of fire weather over southern Australia. As illustrated by the recent Victorian bushfires, Australia has one of the most severe fire climates in the world. Fires play a major role in modifying our landscape, affecting native flora and fauna, and damaging infrastructure and property. Effective fire fighting and fire management relies heavily on the prediction of fire weather and the impact of atmospheric conditions on fire behaviour. This project investigates some ....The dynamics and predictability of fire weather over southern Australia. As illustrated by the recent Victorian bushfires, Australia has one of the most severe fire climates in the world. Fires play a major role in modifying our landscape, affecting native flora and fauna, and damaging infrastructure and property. Effective fire fighting and fire management relies heavily on the prediction of fire weather and the impact of atmospheric conditions on fire behaviour. This project investigates some of the key processes that cause local enhancements in fire weather in regions of complex terrain like southern Australia.Read moreRead less
AN INTEGRATED STUDY OF ATMOSPHERIC WAVE GENERATION AND COUPLING. Small-scale atmospheric gravity waves play an important, but not well understood, role in determining the state of the atmosphere. Observations to be made in northern Australia in 2005-2006 will bring together different kinds of radars and other instruments to study rain production processes in thunderstorms. Results will be used in a high-resolution numerical model to test wave generation by storms and to study their impact on the ....AN INTEGRATED STUDY OF ATMOSPHERIC WAVE GENERATION AND COUPLING. Small-scale atmospheric gravity waves play an important, but not well understood, role in determining the state of the atmosphere. Observations to be made in northern Australia in 2005-2006 will bring together different kinds of radars and other instruments to study rain production processes in thunderstorms. Results will be used in a high-resolution numerical model to test wave generation by storms and to study their impact on the atmosphere. The project will contribute to the improvement of weather radar measurements of rainfall and to improvement in numerical weather forecasting and climate prediction. It will provide high-quality training for postgraduate students in the use of state-of-the-art instrumentation and models.Read moreRead less
The dynamics of deep convective clouds and their role in the climate system. Deep convective clouds are the source of some of the largest uncertainties in climate projection models. This research will better characterise turbulence, mixing and momentum transport processes around clouds and develop new methods to include these effects in climate models, leading to more robust estimates of future climate change. An additional benefit of this work is that it will develop new guidelines for cloud-in ....The dynamics of deep convective clouds and their role in the climate system. Deep convective clouds are the source of some of the largest uncertainties in climate projection models. This research will better characterise turbulence, mixing and momentum transport processes around clouds and develop new methods to include these effects in climate models, leading to more robust estimates of future climate change. An additional benefit of this work is that it will develop new guidelines for cloud-induced turbulence avoidance for use by the aviation industry and lead to increased aviation safety.Read moreRead less