A5057473514- Climate variability and models
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Cryospheric studies and observations
- Air Quality and Health Impacts
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Arctic and Antarctic ice dynamics
- Atmospheric Ozone and Climate
- Hydrology and Watershed Management Studies
- Maritime Navigation and Safety
- Coral and Marine Ecosystems Studies
- Geology and Paleoclimatology Research
- Energy, Environment, Economic Growth
- Climate Change and Health Impacts
- Hydrology and Drought Analysis
- COVID-19 impact on air quality
- Polar Research and Ecology
- Ocean Acidification Effects and Responses
- Tropical and Extratropical Cyclones Research
- Lung Cancer Treatments and Mutations
- Insurance, Mortality, Demography, Risk Management
Australian Antarctic Division
2020-2024
University of Tasmania
2020-2024
Australian Research Council
2023-2024
CSIRO Oceans and Atmosphere
2018-2023
Commonwealth Scientific and Industrial Research Organisation
2018-2023
Bureau of Meteorology
2017-2023
The University of Melbourne
2014-2022
ARC Centre of Excellence for Climate System Science
2016-2022
Abstract. Natural aerosol emission represents one of the largest uncertainties in our understanding radiation budget. Sulfur emitted by marine organisms, as dimethyl sulfide (DMS), constitutes one-fifth global sulfur budget and yet distribution, fluxes fate DMS remain poorly constrained. This study evaluates Australian Community Climate Earth System Simulator (ACCESS) United Kingdom Chemistry Aerosol (UKCA) model terms cloud fraction, precipitation, then quantifies role chemistry–climate...
Polar environments are among the fastest changing regions on planet. It is a crucial time to make significant improvements in our understanding of how ocean and ice biogeochemical processes linked with atmosphere. This especially true over Antarctica Southern Ocean where observations severely limited environment far from anthropogenic influences. In this commentary, we outline major gaps knowledge, emerging research priorities, upcoming opportunities needs. We then give an overview...
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 Earth system models struggle to simulate clouds and their radiative effects over the Southern Ocean, partly due a lack of measurements targeted cloud microphysics knowledge. We have evaluated biases downwelling shortwave radiation in ERA5 climate reanalysis using 25 years (1995–2019) summertime surface measurements, collected on Research Supply Vessel (RSV) Aurora Australis , (R/V) Investigator at Macquarie Island. During October–March daylight hours, simulation SW down exhibited...
Global climate models and reanalysis products have revealed large downwelling shortwave radiation biases over the Southern Ocean Antarctica. The are hypothesized to be caused by incapability of accurately simulate frequent occurrence low-level mixed-phase clouds in these regions. It’s crucial elucidate intricacy cloud microphysics aerosol-cloud interaction Antarctica order better system.In this study, we use ground-based observations colleted at Davis, East assess capability...
ABSTRACT Extreme precipitation over the eastern Australia can be significantly enhanced by topographic interaction with westerly flow. These extreme events cause severe flooding, damage and disruption to human activities, yet in some areas they are also an invaluable source of water snow. In this study, we use rain gauge snowfall accumulation data investigate connections between snow alpine large‐scale climate. have been divided into three geographical locations: west mountains, ridgeline...
Abstract. The Southern Ocean radiative bias continues to impact climate and weather models, including the Australian Community Climate Earth System Simulator (ACCESS). bias, characterised by too much shortwave radiation reaching surface, is attributed incorrect simulation of cloud frequency phase. In this work, we use k-means clustering, combined with nudged simulations latest generation ACCESS atmosphere model, evaluate biases when types are correctly incorrectly simulated. We find that...
Abstract. The Southern Ocean radiative bias continues to impact climate and weather models, including the Australian Community Climate Earth System Simulator (ACCESS). bias, characterised by too much shortwave radiation reaching surface, is attributed incorrect simulation of cloud properties, frequency phase. To identify regimes important Ocean, we use k-means histogram clustering, applied a satellite product then fitted nudged simulations latest-generation ACCESS atmosphere model. We...
Abstract The Australian Alps have a unique climatological, ecological and hydrological environment play key role in water supply for southeastern Australia. Using resort observations we compile new robust snow accumulation data set. Both maximum depth total declined over the last 25 years. A significant decreasing trend was observed number of light days, whereas heavy occurrences has remained constant. Maximum temperatures are highly related to all variables. It is suggested that global...
Climate scientists routinely rely on averaging over time or space to simplify complex information and concisely communicate findings. Currently, no consistent definitions of ‘warm’ ‘cool’ seasons for southern Australia exist, making comparisons across studies difficult. Similarly, numerous climate in use either arbitrarily defined areas the Natural Resource Management (NRM) clusters perform spatial averaging. While NRM regions were informed by temperature rainfall information, they remain...
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...
CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 67:43-60 (2016) - DOI: https://doi.org/10.3354/cr01355 Assessment and reconstruction of catchment streamflow trends variability in response rainfall across Victoria, Australia S. Fiddes1,*, B. Timbal2 1School Earth Sciences, University Melbourne, Parkville, Victoria 3010, 2Australian Bureau Meteorology, 3001, *Corresponding...
Abstract. Dimethyl sulfide (DMS) is a naturally occurring aerosol precursor gas which plays an important role in the global sulfur budget, formation and climate. While DMS produced predominantly by phytoplankton, recent observational literature has suggested that corals their symbionts produce comparable amount of DMS, unaccounted for models. It further been hypothesised coral reef source may modulate regional This hypothesis presents particular concern given current threat to reefs under...
Particulate matter pollution of less than 10 μm in diameter (PM10) is a problem for some regional and urban centres across New Zealand during the winter period when solid fuel (wood coal) fires are used home heating. Elevated levels PM10 concentrations occur stable atmospheric conditions, cool air temperatures low wind speeds allow surface inversion to trap PM10. This study examined relationships between local large-scale synoptic conditions at daily seasonal scales. Minimum temperature...
Abstract. As a long-standing problem in climate models, large positive shortwave radiation biases exist at the surface over Southern Ocean, impacting accurate simulation of sea temperature, atmospheric circulation, and precipitation. Underestimations low-level cloud fraction liquid water content are suggested to predominantly contribute these biases. Most model evaluations for focus on summer rely satellite products, which have their own limitations. In this work, we use surface-based...
ABSTRACT Black Saturday ( BS ), 7 February 2009, is recognized as Australia's most severe bushfire event on record. The meteorology that day, although extreme, was typical of southeast Australian events, characterized by gusty northerly winds before a cool change brought strong southerly and dramatic temperature drop. This study investigates range extra‐tropical atmospheric (pressure, temperatures) oceanic anomalies occurred or leading up to . Results show several parameters were within the...
ABSTRACT Brown haze has been observed over a number of urban centres in different geographical locations around the world. It is clear indication degradation air quality above city; however, little known about its underlying causes. This study examines incidence brown subtropical city Auckland, New Zealand between 2001 and 2011. Using photographs to document severity combination near‐surface meteorological observations, reanalysis data three‐dimensional modelling approaches, detailed...
CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 71:219-236 (2017) - DOI: https://doi.org/10.3354/cr01447 Future impacts of climate change on streamflows across Victoria, Australia: making use statistical downscaling S. Fiddes1,2,3*, B. Timbal3 1Australian-German and Energy College, University Melbourne, Parkville, Victoria 3010, Australia 2ARC Centre Excellence for System...
Abstract South‐Eastern Australia and, in particular the state of Victoria, has experienced record deficits rainfall over last 20 years, which cool part year from April to October been most affected. This situation created difficulties for water managers, farmers and fire services, with need provide more certainty about future climate trends becoming clear. The latest projections project an overall drying little change rest year. Although this is line current trends, very large uncertainties...