Reactivity and photochemistry of halide anions: atmospheric implications. Bromine and iodine are suspected to be responsible for most of the halogen-induced ozone loss in the stratosphere but are not currently included in atmospheric models due to a paucity of knowledge of the gas-phase chemistry and photochemistry of their anions and radicals. This project will develop and deploy advanced mass spectrometry and laser spectroscopy techniques to enable precision measurements of the reactions and p ....Reactivity and photochemistry of halide anions: atmospheric implications. Bromine and iodine are suspected to be responsible for most of the halogen-induced ozone loss in the stratosphere but are not currently included in atmospheric models due to a paucity of knowledge of the gas-phase chemistry and photochemistry of their anions and radicals. This project will develop and deploy advanced mass spectrometry and laser spectroscopy techniques to enable precision measurements of the reactions and photo-reactions of gas-phase iodide and bromide anions and their oxides. These state-of-the-art measurements of reaction kinetics and products will enable accurate chemical models that predict the impact of bromine and iodine chemistry on ozone levels and will inform future models for global climate.Read moreRead less
Atmospheric Photothermal Oxidation as a New Reaction in the Atmosphere. Atmospheric models provide crucial advice on the current and future impacts of human activity on the atmosphere. This project hypothesizes the presence of a new class of chemical reactions that are unknown in atmospheric science and therefore missing from the best existing models. The reactions require both sunlight and air, and they behave differently to all other types of atmospheric reactions. This project aims to charact ....Atmospheric Photothermal Oxidation as a New Reaction in the Atmosphere. Atmospheric models provide crucial advice on the current and future impacts of human activity on the atmosphere. This project hypothesizes the presence of a new class of chemical reactions that are unknown in atmospheric science and therefore missing from the best existing models. The reactions require both sunlight and air, and they behave differently to all other types of atmospheric reactions. This project aims to characterise these reactions in the lab, understand them with theory, and quantify their global impact through modelling. Expected benefits include new understanding of atmospheric chemistry, more accurate model predictions, and—as a result—better strategies for managing the impacts of human activity on the environment.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200100549
Funder
Australian Research Council
Funding Amount
$384,616.00
Summary
The true impact of fluorinated compounds in the atmosphere. This project aims to improve the underpinning science that is incorporated into atmospheric chemistry models so humanity can better understand, predict and respond to the impact of emitting large volumes of fluorinated compounds. This project expects to challenge assumptions currently used to model the atmospheric chemistry of organic fluorine compounds, as well as to evaluate the environmental impact of replacements. Expected outcomes ....The true impact of fluorinated compounds in the atmosphere. This project aims to improve the underpinning science that is incorporated into atmospheric chemistry models so humanity can better understand, predict and respond to the impact of emitting large volumes of fluorinated compounds. This project expects to challenge assumptions currently used to model the atmospheric chemistry of organic fluorine compounds, as well as to evaluate the environmental impact of replacements. Expected outcomes include a general model of organic fluorine photochemistry and refined atmospheric chemistry models. This should provide significant benefits in that humanity can avoid an environmental disaster and new, environmentally benign products can be developed.Read moreRead less
The long-term impact of short-lived, fluorinated pollutants. In 1987, the Montreal Protocol has regulated the manufacture and use of compounds that deplete the ozone layer. Industry has innovated to produce new compounds that do not affect ozone levels, for use in refrigeration and other applications for modern society. We have discovered that the current generation of compounds called hydrofluoroolefins decompose in the atmosphere to produce the worst global warming gas known. We hypothesise th ....The long-term impact of short-lived, fluorinated pollutants. In 1987, the Montreal Protocol has regulated the manufacture and use of compounds that deplete the ozone layer. Industry has innovated to produce new compounds that do not affect ozone levels, for use in refrigeration and other applications for modern society. We have discovered that the current generation of compounds called hydrofluoroolefins decompose in the atmosphere to produce the worst global warming gas known. We hypothesise that other HFOs will also decay into global warming compounds. In this project we will determine the atmospheric consequences of modern refrigerants. Expected benefits include determination the best and worst compounds for environmental impact, and data to guide industry and legislators.Read moreRead less
Viral capsids as high-efficiency nanoreactors. This project aims to develop state-of-the-art single-molecule imaging to visualise DNA synthesis inside authentic retroviral capsids in real time. The project expects to generate new knowledge in the fields of virology, synthetic biology, and nanotechnology by utilising cutting-edge fluorescent labelling reagents and microscopy technology. Expected outcomes include a comprehensive description of retrovirus reverse transcription, development of innov ....Viral capsids as high-efficiency nanoreactors. This project aims to develop state-of-the-art single-molecule imaging to visualise DNA synthesis inside authentic retroviral capsids in real time. The project expects to generate new knowledge in the fields of virology, synthetic biology, and nanotechnology by utilising cutting-edge fluorescent labelling reagents and microscopy technology. Expected outcomes include a comprehensive description of retrovirus reverse transcription, development of innovative biophysical techniques for the study of viruses, and an understanding of the engineering principles at play in natural nano-reactors. This project anticipates contributing advanced capabilities in bionanotechnology, benefiting therapeutic, biotechnology and synthetic biology applications.Read moreRead less
A coordinate-independent theory for multi-time-scale dynamical systems. Biochemical reaction networks operate inherently on many disparate timescales, and identifying this temporal hierarchy is key to understanding biological behaviour. Currently, the existing dynamical systems theory is not able to rigorously analyse many important biological systems and networks due to this inherent non-standard multi-time-scale splitting. This project aims to remove these stumbling blocks and develop a coordi ....A coordinate-independent theory for multi-time-scale dynamical systems. Biochemical reaction networks operate inherently on many disparate timescales, and identifying this temporal hierarchy is key to understanding biological behaviour. Currently, the existing dynamical systems theory is not able to rigorously analyse many important biological systems and networks due to this inherent non-standard multi-time-scale splitting. This project aims to remove these stumbling blocks and develop a coordinate-independent mathematical theory that weaves together results from geometric singular perturbation theory, differential and algebraic geometry and reaction network theory to decompose and explain the structure in the dynamic hierarchy of events in non-standard multi-time-scale systems and networks.Read moreRead less
Local climate changes caused by large bushfire burnt areas. This project aims to quantify the impact on local climate produced by large burnt areas after extreme bushfires. This project expects to generate new knowledge on these previously unexplored fire-scar induced changes to local climate. It will extend an innovative approach that combines satellite based earth observation with very high resolution regional climate modelling to quantify the impacts on land-atmosphere feedbacks and local cli ....Local climate changes caused by large bushfire burnt areas. This project aims to quantify the impact on local climate produced by large burnt areas after extreme bushfires. This project expects to generate new knowledge on these previously unexplored fire-scar induced changes to local climate. It will extend an innovative approach that combines satellite based earth observation with very high resolution regional climate modelling to quantify the impacts on land-atmosphere feedbacks and local climate. Expected outcomes of this project include enhanced methods to quantify local climate changes after extreme fires and their effect on vegetation recovery. This should provide significant benefits to the planning for, and management of, vegetation recovery after extreme fires.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
Role of modulating water wave groups in enhancing air-water fluxes. This project aims to investigate the importance of the group structure and breaking of wind-generated waves of various scales in the air-water exchange of mass, momentum and energy. This project expects to generate new understanding in the area of air-water exchanges using an innovative approach based on direct numerical simulation of wind over unsteady water wave groups for a wide range of wind speed and wave steepness conditi ....Role of modulating water wave groups in enhancing air-water fluxes. This project aims to investigate the importance of the group structure and breaking of wind-generated waves of various scales in the air-water exchange of mass, momentum and energy. This project expects to generate new understanding in the area of air-water exchanges using an innovative approach based on direct numerical simulation of wind over unsteady water wave groups for a wide range of wind speed and wave steepness conditions.
Expected outcomes of this project include generating fundamental knowledge of the unresolved physics and new parameterisations for air-water exchange rates. This will deliver more accurate and more comprehensive forecast models for weather, inland and ocean waterways, and numerous industrial processes.Read moreRead less