A5022429137- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Plant responses to elevated CO2
- Air Quality Monitoring and Forecasting
- Vehicle emissions and performance
- Climate Change and Health Impacts
- Species Distribution and Climate Change
- Climate variability and models
- Wind and Air Flow Studies
- Plant Water Relations and Carbon Dynamics
- Meteorological Phenomena and Simulations
- Smart Materials for Construction
- Allergic Rhinitis and Sensitization
- Remote Sensing in Agriculture
- Energy and Environment Impacts
- Mine drainage and remediation techniques
- Tree Root and Stability Studies
- Rangeland and Wildlife Management
- Carbon Dioxide Capture Technologies
- Radioactive contamination and transfer
- Underground infrastructure and sustainability
- Maritime Transport Emissions and Efficiency
Commonwealth Scientific and Industrial Research Organisation
2015-2024
CSIRO Oceans and Atmosphere
2014-2023
University of Nebraska–Lincoln
2021
University of Virginia
2021
University of South Carolina
2021
Northern Illinois University
2021
Illinois Archaeological Survey
2021
University of Illinois Urbana-Champaign
2021
NSF National Center for Atmospheric Research
2021
Texas A&M University
2021
Abstract. Methane and ozone are two important climate gases with significant tropospheric chemistry. Within chemistry-climate transport models this chemistry is simplified for computational expediency. We compare the state of art Master Chemical Mechanism (MCM) six schemes (CRI-reduced, GEOS-CHEM a adduct, MOZART-2, TOMCAT CBM-IV) that could be used within composition models. test box model framework under conditions derived from field observations regional scale pollution event. find...
Abstract. In the most advanced aerosol-climate models it is common to represent aerosol particle size distribution in terms of several log-normal modes. This approach, motivated by computational efficiency, makes assumptions about shape that may not always capture properties global aerosol. Here, a modal microphysics module (GLOMAP-mode) evaluated and improved comparing against sectional version (GLOMAP-bin) observations same 3-D offline chemistry transport model. With both schemes, model...
Abstract. We use a stratosphere–troposphere composition–climate model with interactive sulfur chemistry and aerosol microphysics, to investigate the effect of 1991 Mount Pinatubo eruption on stratospheric properties. Satellite measurements indicate that shortly after eruption, between 14 23 Tg SO2 (7 11.5 sulfur) was present in tropical stratosphere. Best estimates peak global burden are range 19 26 Tg, or 3.7 6.7 assuming composition 59 77 % H2SO4. In light this large uncertainty range, we...
Abstract. This paper documents the tropospheric chemical mechanism scheme used in TOMCAT 3-D transport model. The current includes a more detailed representation of hydrocarbon chemistry than previously included model, with inclusion emission and oxidation ethene, propene, butane, toluene monoterpenes. model is evaluated against range surface, balloon, aircraft satellite measurements. generally able to capture main spatial seasonal features high low concentrations carbon monoxide (CO), ozone...
This commentary paper from the recently formed International Global Atmospheric Chemistry (IGAC) Southern Hemisphere Working Group outlines key issues in atmospheric composition research that particularly impact Hemisphere. In this article, we present a broad overview of many challenges for understanding chemistry Hemisphere, before focusing on most significant factors differentiate it Northern We sections importance biogenic emissions and fires showing these often dominate over...
Measurements of the OH radical during winter show that noon‐time concentrations at an urban site in Birmingham are only a factor 2 less than summer same site, despite 15 reduction production from photolysis ozone. Noon‐time HO were similar for and winter. These high quantitatively reproduced by detailed box‐model, showing pool (OH, , RO ) is sustained reactions unsaturated hydrocarbons with ozone carbonyls. The there significant chemical processing volatile organic compounds (VOCs)...
Abstract. The biogenic emissions of isoprene and monoterpenes are one the main drivers atmospheric photochemistry, including oxidant secondary organic aerosol production. In this paper, emission rates from Australian vegetation investigated for first time using Model Emissions Gases Aerosols Nature version 2.1 (MEGANv2.1); CSIRO chemical transport model; observations isoprene, oxidation products (methacrolein methyl vinyl ketone). Observations four field campaigns during three different...
The world’s most severe thunderstorm asthma event occurred in Melbourne, Australia on 21 November 2016, coinciding with the peak of grass pollen season. aetiological role thunderstorms these events is thought to cause rupture high humidity conditions, releasing large numbers sub-pollen particles (SPPs) sizes very easily inhaled deep into lungs. hypothesis was implemented a three-dimensional atmospheric model and driven by inputs from three meteorological models. However, mechanism could not...
Abstract. One of the key challenges in atmospheric chemistry is to reduce uncertainty biogenic volatile organic compound (BVOC) emission estimates from vegetation atmosphere. In Australia, eucalypt trees are a primary source emissions, but their contribution Australian air sheds poorly quantified. The Model Emissions Gases and Aerosols Nature (MEGAN) has performed against isoprene monoterpene observations. Finding reasons for MEGAN discrepancies strengthening our understanding emissions this...
This paper presents a summary of the key findings special issue Atmosphere on Air Quality in New South Wales and discusses implications work for policy makers individuals. edition new air quality research Australia undertaken by (or association with) Clean Urban Landscapes hub, which is funded National Environmental Science Program behalf Australian Government’s Department Environment Energy. pollution cities generally low, with typical concentrations pollutants at much lower levels than...
Abstract Atmospheric carbon dioxide enrichment (eCO 2 ) can enhance plant uptake and growth 1,2,3,4,5 , thereby providing an important negative feedback to climate change by slowing the rate of increase atmospheric CO concentration 6 . While evidence gathered from young aggrading forests has generally indicated a strong fertilization effect on biomass 3,4,5 it is unclear whether mature respond eCO in similar way. In trees forest stands 7,8,9,10 photosynthetic been found under without any...
We propose a new technique to prepare statistically-robust benchmarking data for evaluating chemical transport model meteorology and air quality parameters within the urban boundary layer. The approach employs atmospheric class-typing, using nocturnal radon measurements assign mixing classes, can be applied temporally (across diurnal cycle), or spatially (to create angular distributions of pollutants as top-down constraint on emissions inventories). In this study only short (<1-month)...
The ability of meteorological models to accurately characterise regional meteorology plays a crucial role in the performance photochemical simulations air pollution. As part research funded by Australian government’s Department Environment Clean Air and Urban Landscape hub, this study set out complete an intercomparison quality over Sydney region. This would test existing modelling capabilities, identify any problems provide necessary validation first component was assess reproduce...
Abstract. Predicting future air quality in Australian cities dominated by eucalypt emissions requires an understanding of their emission potentials a warmer climate. Here we measure the temperature response isoprene from saplings four different Eucalyptus species grown under current and average summertime conditions. The conditions represent 2050 climate Representative Concentration Pathway 8.5, with daytime temperatures 294.5 K. Ramping 293 to 328 K resulted these eucalypts emitting at 4–9...
Abstract In November 2016, an unprecedented epidemic thunderstorm asthma event in Victoria, Australia, resulted many thousands of people developing breathing difficulties a very short period time, including 10 deaths, and created extreme demand across the Victorian health services. To better prepare for future events, pilot forecasting system (ETSA) risk has been developed Victoria. The uses categorical risk-based approach, combining operational gusty winds severe thunderstorms with...
Abstract. During the TORCH campaign a zero dimensional box model based on Master Chemical Mechanism was used to concentrations of OH radicals. The provided close overall fit measured but with some significant deviations. In this research, an approach established for applying Generalized Additive Models (GAM) atmospheric concentration data. Two GAM models were fitted radical using data, first data and second MCM results. five smooth functions 78% deviance explained 83% modelled OH. produced...
Poor air quality is often associated with hot weather, but the quantitative attribution of high temperatures on remains unclear. In this study, effect elevated investigated in Greater Sydney using January 2013, a period extreme heat during which at times exceeded 40 °C, as case study. Using observations from 17 measurement sites and Weather Research Forecasting Chemistry (WRF-Chem) model, we analyse ozone by running number sensitivity studies which: (1) model run biogenic emissions generated...