A5055433801- Climate variability and models
- Oceanographic and Atmospheric Processes
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Marine and coastal ecosystems
- Geophysics and Gravity Measurements
- Atmospheric chemistry and aerosols
- Cardiovascular Function and Risk Factors
- Medical Imaging Techniques and Applications
- Cancer, Hypoxia, and Metabolism
- Air Quality and Health Impacts
- Vehicle emissions and performance
- demographic modeling and climate adaptation
- Astrophysics and Star Formation Studies
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Energetic Materials and Combustion
- Seismology and Earthquake Studies
- Heat Transfer and Boiling Studies
- Nutrition, Health and Food Behavior
- GNSS positioning and interference
- Pancreatitis Pathology and Treatment
- Advanced Computational Techniques and Applications
CSIRO Oceans and Atmosphere
2013-2025
Monash University
2022-2025
Centre for Southern Hemisphere Oceans Research
2022-2023
Louisiana Tech University
2023
Commonwealth Scientific and Industrial Research Organisation
2008-2018
Collaboration for Australian Weather and Climate Research
2013
Lawrence Livermore National Laboratory
2013
The Australian Community Climate and Earth System Simulator coupled model (ACCESS-CM) has been developed at the Centre for Weather Research (CAWCR), a partnership between CSIRO 1 Bureau of Meteorology.It is built by coupling UK Met Office atmospheric unified (UM), other sub-models as required, to ACCESS ocean model, which consists NOAA/GFDL 2 MOM4p1 LANL 3 sea-ice CICE4.1,under CERFACS 4 OASIS3.2-5coupling framework.The primary goal ACCESS-CM development provide climate community with new...
A new version of the Australian Community Climate and Earth System Simulator coupled model, ACCESS-CM2, has been developed for a wide range climate modelling research applications. In particular, ACCESS-CM2 is one Australia’s contributions to World Research Programme’s Coupled Model Intercomparison Project Phase 6 (CMIP6). Compared with ACCESS1.3 model used our CMIP5 submission, all components have upgraded as well coupling framework (OASIS3-MCT) experiment control system (Rose/Cylc). The...
Abstract The most recent Intergovernmental Panel on Climate Change assessment report concludes that the Atlantic Meridional Overturning Circulation (AMOC) could weaken substantially but is very unlikely to collapse in 21st century. However, largely neglected Greenland Ice Sheet (GrIS) mass loss, lacked a comprehensive uncertainty analysis, and was limited Here community effort, improved estimates of GrIS loss are included multicentennial projections using eight state‐of‐the‐science climate...
Is the recent high frequency of positive Indian Ocean Dipole (pIOD) events a consequence global warming? Using available observations and reanalyses, we show that pIOD occurrences increase from about four per 30 years early in 20th century to 10 over last years; by contrast, number negative (nIOD) decreases two same periods, respectively. A skewness measure, defined as difference pIODs nIODs, illustrates systematic trend this parameter commencing century. After 1950, there are more than with...
Abstract An asymmetry, and its multidecadal variability, in a rainfall teleconnection with the El Niño–Southern Oscillation (ENSO) are described. Further, breakdown of this relationship since 1980 is offered as cause for reduction an ENSO-affected region, southeast Queensland (SEQ). There, austral summer has been declining around 1980s, but associated process not understood. It demonstrated that simulated by majority current climate models forced anthropogenic forcing factors. Examination...
There are two versions of global coupled climate models developed at the Centre for Australian Weather and Climate Research (CAWCR) participating in phase 5 Coupled Model Inter-comparison Project (CMIP5), namely ACCESS1.0 AC-CESS1.3.This paper describes CMIP5 experimental configuration AC-CESS forcings historical future scenario runs.We also present an initial analysis model results, concentrating on changes surface air temperature hydrologic cycle, sensitivity.Both somewhat underestimate...
Abstract Simulations of individual global climate drivers using models from the Coupled Model Intercomparison Project phase 3(CMIP3) have been examined; however, relationship among them has not assessed. This is carried out to address several important issues, including likelihood southern annular mode (SAM) forcing Indian Ocean dipole (IOD) events and possible impact IOD on El Niño–Southern Oscillation (ENSO) events. Several conclusions emerge statistics based multimodel outputs. First,...
During year-to-year El Niño events in recent decades, major sea surface warming has occurred frequently the central Pacific. This is distinct from eastern Pacific pattern during canonical events. Accordingly, central-Pacific exerts impacts on ecosystems, climate and hurricanes worldwide. The increased frequency of new type presents a challenge not only for understanding dynamics its change but also prediction global at present future climate. Previous studies have proposed different indices...
The Southern Ocean surface has freshened in recent decades, increasing water column stability and reducing upwelling of warmer subsurface waters. majority CMIP5 models underestimate or fail to capture this historical freshening, yet little is known about the impact model bias on regional ocean circulation hydrography. Here experiments are performed using a global coupled climate with additional freshwater applied assess influence freshening. simulations explore persistent long-term...
The Australian Community Climate and Earth System Simulator (ACCESS) has contributed to the World Research Programme’s Coupled Model Intercomparison Project Phase 6 (CMIP6) using two fully coupled model versions (ACCESS-CM2 ACCESS-ESM1.5) ocean–sea-ice (1° 0.25° resolution of ACCESS-OM2). models differ primarily in configuration version their atmosphere components (including aerosol scheme), with smaller differences sea-ice land versions. Additionally, ACCESS-ESM1.5 includes biogeochemistry...
Abstract The present study assesses the ability of climate models to simulate rainfall teleconnections with El Niño–Southern Oscillation (ENSO) and Indian Ocean dipole (IOD). An assessment is provided on 24 that constitute phase 3 World Climate Research Programme’s Coupled Model Intercomparison Project (WCRP CMIP3), used in Fourth Assessment Report (AR4) Intergovernmental Panel Change (IPCC). strength ENSO–rainfall teleconnection, defined as correlation between Niño-3.4, overwhelmingly...
Are the 2006–2008 three‐consecutive positive Indian Ocean Dipole (pIOD) events linked to climate change? Using 20th century experiments submitted for Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4), we show that a 19‐model average IOD index over 1950–1999 period yields an upward trend. The associated circulation trends provide favourable environment pIOD development, leading 17% increase in frequency compared with case which are removed. majority of manifests...
Abstract Tropical Pacific variability (TPV) heavily influences global climate, but much is still unknown about its drivers. We examine the impact of South on modes TPV: El Niño-Southern Oscillation (ENSO) and Interdecadal (IPO). conduct idealised coupled experiments in which we suppress temperature salinity at all oceanic levels Pacific. This reduces decadal equatorial by ~30% distorts spatial pattern IPO. There little change to overall interannual variability, however there a decrease...
Abstract El Niño and La Niña, the warm cold phases of Niño–Southern Oscillation (ENSO), cause significant year-to-year disruptions in global climate, including atmosphere, oceans, cryosphere. Australia is one countries where its droughts flooding rains, highly sensitive to temporal spatial variations ENSO. The dramatic impacts ENSO on environment, society, health, economies worldwide make application reliable predictions a powerful way manage risks resources. An improved understanding...
Abstract The El Niño Southern Oscillation (ENSO) is a significant interannual phenomenon that occurs every 2-7 years in the tropical Pacific and has global climate impacts linked to natural disasters. Understanding accurately modelling ENSO dynamics crucial for predicting its understanding characteristics of itself, such as amplitude, periodicity, spatial pattern. However, latest version Australian model ACCESS-CM2 (CM2), simulated mainly displays quasi-biennial oscillations (around 2-2.5...
The El Niño-Southern Oscillation (ENSO) is the dominant mode of interannual variability, with global climate impacts that underscore importance its accurate representation in models. Building on success CLIVAR ENSO metrics package, our work focuses developing an advanced workflow for evaluating ACCESS family models, extending functionality to include diagnostics Indian Ocean Dipole (IOD). Our approach leverages IRIS-based pre-processors within ESMValTool, enabling a modular and...
Abstract. A new configuration of the Australian Community Climate and Earth System Simulator coupled model, ACCESSCM2, with a higher resolution ocean-sea ice component at 0.25° is introduced. The ACCESS-CM2-025 model was developed to better represent ocean mesoscale expand scope climate modelling research applications. individual components have not been changed compared ACCESS-CM2-1, existing lower version 1°, which one Australia’s contributions World Research Program’s Coupled Model...
Internal Kelvin Wave (KW) propagation is studied about variations in the sea surface temperature anomaly (SSTA) over tropical Pacific. Temperature and Salinity (TS) observations have been used to define vertical structure of ocean properties KWs. Changes water column determine consistent zonal wave velocity, with values varying, roughly, from 1.8 2.6 m/s. The authors document that KWs are formed regularly at western boundary Pacific, but, these cases, never overcome dateline. Occasionally,...
Global and regional diagnostics are used to evaluate the ocean performance of Australian Community Climate Earth System Simulator coupled model (ACCESS-CM) contributions Model Intercomparison Project phase 5 (CMIP5). Two versions ACCESS-CM have been submitted CMIP; namely CSIRO-BOM ACCESS1.0 ACCESS1.3. Results from six core CMIP5 experiments (piControl, historical, rcp45, rcp85, 1pctCO2, abrupt4xCO2) evaluated for each two versions. Overall, both exhibit a reasonable stable representation...
We analyse and document the historical simulations performed by two versions of Australian Community Climate Earth System Simulator (ACCESS-CM2 ACCESS-ESM1.5) for Coupled Model Intercomparison Project Phase 6 (CMIP6). Three ensemble members from each model are used to compare simulated seasonal-mean climate, climate variability change with observations over period. Where appropriate, we also ACCESS results 36 other CMIP6 models. find that winter summer mean climates (over global domain)...