A5013097954- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Marine and coastal ecosystems
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Fire effects on ecosystems
- Underground infrastructure and sustainability
- Marine and fisheries research
- Infection Control and Ventilation
- Aeolian processes and effects
- Oceanographic and Atmospheric Processes
- Recycled Aggregate Concrete Performance
- Coral and Marine Ecosystems Studies
- Vehicle emissions and performance
- Coastal and Marine Management
- Climate variability and models
- Geology and Paleoclimatology Research
- Biodiesel Production and Applications
- COVID-19 impact on air quality
- Inhalation and Respiratory Drug Delivery
- Coastal and Marine Dynamics
- Aerosol Filtration and Electrostatic Precipitation
- Energy, Environment, Economic Growth
- Mining and Resource Management
Queensland University of Technology
2013-2023
CSIRO Oceans and Atmosphere
2017
Commonwealth Scientific and Industrial Research Organisation
2017
Abstract Weather and climate models are challenged by uncertainties biases in simulating Southern Ocean (SO) radiative fluxes that trace to a poor understanding of cloud, aerosol, precipitation, processes, their interactions. Projects between 2016 2018 used situ probes, radar, lidar, other instruments make comprehensive measurements thermodynamics, surface radiation, cloud condensation nuclei (CCN), ice nucleating particles over the SO cold waters, ubiquitous liquid mixed-phase clouds common...
Abstract. The aerosol-driven radiative effects on marine low-level cloud represent a large uncertainty in climate simulations, particular over the Southern Ocean, which is also an important region for sea spray aerosol production. Observations of organic enrichment and resulting impact water uptake remote Hemisphere are scarce, therefore under-represented existing parameterisations. Surface Ocean Aerosol Production (SOAP) voyage was 23 d sampled three phytoplankton blooms highly productive...
The viability of airborne respiratory viruses varies with ambient relative humidity (RH). Numerous contrasting reports spanning several have failed to identify the mechanism underlying this dependence. We hypothesized that an "efflorescence/deliquescence divergent infectivity" (EDDI) model accurately predicts RH-dependent survival human rhinovirus-16 (HRV-16). measured efflorescence and deliquescence RH (RHE RHD, respectively) aerosols nebulized from a protein-enriched saline carrier fluid...
Relative humidity (RH) can affect influenza A virus (IAV) survival. However, the mechanism driving this relationship is unknown. We hypothesized that RH-dependent survival of airborne IAV could be predicted by efflorescence/deliquescence divergent infectivity (EDDI) hypothesis. determined three distinct RH response zones based on hygroscopic growth factor carrier aerosols. These were classified as super-deliquescence zone (RH > 75%), hysteresis (43% < and sub-efflorescence 43%). added (H3N2)...
Abstract. Establishing the relationship between marine boundary layer (MBL) aerosols and surface water biogeochemistry is required to understand aerosol cloud production processes over remote ocean represent them more accurately in earth system models global climate projections. This was addressed by SOAP (Surface Ocean Aerosol Production) campaign, which examined air–sea interaction biologically productive frontal waters east of New Zealand. overview details objectives, regional context,...
Abstract. The frequency of coral bleaching events increased during the past decade in Great Barrier Reef due to climate change, and rising ocean temperatures. Recent work has demonstrated that enhancing local-scale cloud albedo can reduce sea surface temperatures this region. However, little research been done on variations aerosol properties, as well aerosol-radiation aerosol-cloud interactions over different regions Reef, which is critical for predicting potential Marine Cloud Brightening...
Abstract. The SAFIRED (Savannah Fires in the Early Dry Season) campaign took place from 29 May until 30 June 2014 at Australian Tropical Atmospheric Research Station (ATARS) Northern Territory, Australia. purpose of this was to investigate emissions fires early dry season northern Measurements were made biomass burning aerosols, volatile organic compounds, polycyclic aromatic carbons, greenhouse gases, radon, speciated atmospheric mercury and trace metals. Aspects aerosol investigated...
The airborne dynamics of respiratory droplets, and the transmission routes pathogens embedded within them, are governed primarily by diameter particles. These particles composed fluid which lines tract, is mucins salts, will interact with atmosphere evaporate to reach an equilibrium diameter. Measuring organic volume fraction (OVF) cough aerosol has proved challenging due large variability low material produced after coughing. Here, diametric hygroscopic growth factors (GF) healthy...
Abstract. The remoteness and extreme conditions of the Southern Ocean Antarctic region have meant that observations in this are rare, typically restricted to summertime during research or resupply voyages. Observations aerosols outside summer season limited long-term stations, such as Kennaook / Cape Grim (KCG; 40.7∘ S, 144.7∘ E), which is situated northern latitudes Ocean, Japanese operated Syowa (SYO; 69.0∘ 39.6∘ E). Measurements midlatitudes important, particularly light recent...
Abstract. There is a lack of knowledge how biomass burning aerosols in the tropics age, including those fire-prone Northern Territory Australia. This paper reports chemical characterization fresh and aged monitored during 1-month-long SAFIRED (Savannah Fires Early Dry Season) field study, with an emphasis on signature aging organic aerosols. The campaign took place June 2014 early dry season when surface measurement site, Australian Tropical Atmospheric Research Station (ATARS), located...
Abstract. The vast majority of Australia's fires occur in the tropical north continent during dry season. These are a significant source aerosol and cloud condensation nuclei (CCN) region, providing unique opportunity to investigate biomass burning (BBA) absence other sources. CCN concentrations at 0.5 % supersaturation size chemical properties were measured Australian Tropical Atmospheric Research Station (ATARS) June 2014. reached over 104 cm−3 when frequent close – up 45 times higher than...
Abstract. Cloud–radiation interactions over the Southern Ocean are not well constrained in climate models, part due to uncertainties sources, concentrations, and cloud-forming potential of aerosol this region. To date, most studies region have reported measurements from fixed terrestrial stations or a limited set instrumentation often present findings as broad seasonal latitudinal trends. Here, we an extensive meteorological observations obtained during austral summer cruise across full...
Abstract. Coral reefs have been found to produce the sulfur compound dimethyl sulfide (DMS), a climatically relevant aerosol precursor predominantly associated with phytoplankton. Until recently, role of coral-reef-derived DMS within climate system had not quantified. A study preceding present work that produced by corals negligible long-term climatic forcing at global–regional scale. However, sub-daily timescales more typically and cloud formation, influence on local radiative effects...
Abstract Volatility‐hygroscopicity tandem differential mobility analyzer measurements were used to infer the composition of sub‐100 nm diameter Southern Ocean marine aerosols at Cape Grim in November and December 2007. This study focuses on a short‐lived high sea spray aerosol (SSA) event 7–8 with two externally mixed modes Hygroscopic Growth Factor (HGF) distributions (90% relative humidity (RH)), one HGF > 2 another HGF~1.5. The particles displayed deliquescent transition 73–75% RH...
Abstract Sea spray aerosol (SSA) particles produced from the ocean surface in regions of biological activity can vary greatly size, number and composition, their influence on cloud formation. Algal species such as phytoplankton alter SSA composition. Numerous studies have investigated nascent properties, but all these focused by seawater noncoral related coastal regions. Bubble chamber experiments were performed with samples taken reef flat around Heron Island Great Barrier Reef during...
Abstract In-situ marine cloud droplet number concentrations (CDNCs), condensation nuclei (CCN), and CCN proxies, based on particle sizes optical properties, are accumulated from seven field campaigns: ACTIVATE; NAAMES; CAMP 2 EX; ORACLES; SOCRATES; MARCUS; CAPRICORN2. Each campaign involves aircraft measurements, ship-based or both. Measurements collected over the North Central Atlantic, Indo-Pacific, Southern Oceans, represent a range of clean to polluted conditions in various climate...
Abstract. There is a lack of knowledge how biomass burning aerosols in the tropics age, including those fire-prone Northern Territory Australia. This paper reports chemical characterization and aging monitored during one month long SAFIRED (Savannah Fires Early Dry Season) field study, with an emphasis on signature organic aerosols. The campaign took place June 2014 early dry season when surface measurement site, Australian Tropical Atmospheric Research Station (ATARS), located Territory,...
Abstract. The aerosol driven radiative effects on marine low-level cloud represent a large uncertainty in climate simulations, particular over the Southern Ocean, which is also an important region for sea spray production. Observations of organic enrichment and resulting impact water uptake remote southern hemisphere are scarce, therefore under-represented existing parameterisations. Surface Ocean Aerosol Production (SOAP) voyage was 23 day sampled three phytoplankton blooms highly...
Abstract. The SAFIRED (Savannah Fires in the Early Dry Season) campaign took place from 29th of May, 2014 until 30th June, at Australian Tropical Atmospheric Research Station (ATARS) Northern Territory, Australia. purpose this was to investigate emissions fires early dry season northern Measurements were made biomass burning aerosols, volatile organic compounds, polycyclic aromatic carbons, greenhouse gases, radon, mercury cycle, and trace metals. Aspects aerosol investigated included;...