A5035006455- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Oceanographic and Atmospheric Processes
- Climate variability and models
- Coastal and Marine Dynamics
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Coastal and Marine Management
- Meteorological Phenomena and Simulations
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Earthquake and Tsunami Effects
- Wave and Wind Energy Systems
- Methane Hydrates and Related Phenomena
- Coastal wetland ecosystem dynamics
- Geological and Geophysical Studies
- Geological Studies and Exploration
The University of Melbourne
2018-2024
CSIRO Oceans and Atmosphere
2024
Hasanuddin University
2023
Bureau of Meteorology
2023
We describe an innovative approach to estimate global changes in extreme wave conditions by 2100, as a result of projected climate change. generate synthetic dataset from ensemble models forced independent simulation winds, enhancing statistical confidence associated with conditions. Under two IPCC representative greenhouse gas emission scenarios (RCP4.5 and RCP8.5), we find that the magnitude 1 100-year significant height (Hs ) event increases 5 15% over Southern Ocean end 21st century,...
Abstract The trends in marine 10-m wind speed U 10 and significant wave height H s found two century-long reanalyses are compared against a model-only integration. Reanalyses show spurious due to the assimilation of an increasing number observations over time. comparisons between model that areas where discrepancies greatest also there is marked increase assimilated observations. Large differences yearly averages call into question quality by reanalyses, resulting unreliable before 1950s....
Abstract We present four 140-yr wind-wave climate simulations (1961–2100) forced with surface wind speed and sea ice concentration from two CMIP6 GCMs under different scenarios: SSP1–2.6 SSP5–8.5. A global three-grid system is implemented in WAVEWATCH III to simulate the wave–ice interactions Arctic Antarctic regions. The models perform well comparison satellite altimeter situ buoys climatology. traditional trend analyses demonstrates GCM-forced wave models’ ability reproduce main historical...
In this study, a third-generation ocean wave model (WAVEWATCH III; WW3) implemented on high-resolution unstructured grid was developed to investigate energy in the south-east of Australia over 40-year period from 1981 2020. The simulated power shows good agreement with values estimated multiplatform satellite data. Thus, modeled data were used study statistics (mean conditions, seasonality, extremes, and long-term trends) domain, which show impacts Southern Ocean swell protection provided by...
Abstract A high-resolution third-generation wave model based on unstructured grids, WAVEWATCH III (WW3), was used to study the projected future climate of Bass Strait and south-east Australia under two different greenhouse gas emission scenarios (SSP1-2.6 SSP5-8.5). The model, forced with winds from Australian ACCESS-CM2 Global Climate Model, shows good agreement coastal long-term buoy observations an independent WW3 hindcast dataset over historical period 1985–2014. mean significant height...
Abstract This study analyses the past and future wave climate of Bass Strait south‐east Australia by comparing two high‐resolution regional models (RWCMs), respectively forced surface wind speed EC‐Earth3 ACCESS‐CM2 global circulation (GCMs) under emission scenarios (SSP1‐2.6 SSP5‐8.5). The RWCMs are verified against long‐term buoy satellite observations as well hindcast model data. comparison with altimeter shows good agreement between observations. Both project a increase in swell,...
Abstract A holistic review is given of the Southern Ocean dynamic system, in context crucial role it plays global climate and profound changes experiencing. The focuses on connections between different components drawing together contemporary perspectives from research communities, with objective closing loops our understanding complex network feedbacks overall system. targeted at researchers physical science ambition broadening their knowledge beyond specific field, aims facilitating...
Abstract A global study of extreme value (1 in 100-year return period) tropical cyclone generated waves is conducted across all basins. The uses a 1000 year synthetic track database to force validated parametric wave model. resulting distributions significant height show that values the North Atlantic and Western Pacific basins are largest globally. This partly due relative intensities frequencies occurrence storms these but also because typical velocities forward movement larger hence can...
The present work develops an innovative approach to wind speed and significant wave height extreme value analysis. is based on global atmosphere–wave model ensembles, the members of which are propagated in time from best estimate initial state, with slight perturbations conditions, uncertainties connected representations reality. low correlation individual ensemble member forecasts at advanced lead times guarantees their independence allows us perform inference statistics. advantage...
Abstract Using multiple approaches, the modulation of climate variability on global ocean waves from 1981 to 2020 is investigated based a wave hindcast model forced by ERA5 winds. These variabilities include El Niño–Southern Oscillation (ENSO), Antarctic (AAO), Arctic (AO), Pacific Decadal (PDO), Atlantic Multidecadal (AMO), and Indian Ocean Dipole. Linear regression composite analysis results indicate that Niño‐induced low‐pressure systems in December–February (DJF) generate energetic...
A parametric model for computationally efficient wave height estimation within tropical cyclone conditions is developed. An updated wind vortex used to force a moving grid version of the WAVEWATCH III spectral model, generate large synthetic field database (approximately 400 simulations). This extensive develop which accounts key variables defining magnitude and spatial distribution waves cyclones. The uses JONSWAP-type scaling effects in field. total 28 buoy observations together with...
A holistic review is given of the Southern Ocean dynamic system, in context crucial role it plays global climate and profound changes experiencing. The focuses on connections between different components drawing together contemporary perspectives from research communities, with objective 'closing loops' our understanding complex network feedbacks overall system. For purposes this review, system divided into four main components: large-scale circulation; cryosphere; turbulence; gravity waves....
<p>Extreme ocean waves shape world coastlines and significantly impact offshore operations. Climate change may further exacerbate these effects increasing losses in human lives economic activities. Studies generally agree on the trends mean values, yet there is no consensus extreme events, whether their magnitude and/or frequency are changing. The present work applies an innovative value analysis approach to a multi-model ensemble wind-wave climate dataset, derived from seven...
Abstract Extreme significant wave height estimates, and their probability of exceedance, are fundamental offshore coastal engineering design parameters. These estimates characterized by uncertainty due to an incomplete understanding the atmosphere‐ocean energy momentum exchanges during intense storms. This particularly affects extreme statistics ocean regions exposed large frequent synoptic disturbances such as Extra‐Tropical Cyclones (ETCs). In this work, we assessed performance global...
In this study, our objective is to evaluate the long-term variability of global wave power and its underlying mechanisms, utilizing longest reanalysis available (ERA5, 1940–2022). We introduce a novel validation ERA5 against measurements from multi-platform satellite altimeters 1985 2022. This shows good agreement over period. Our analysis consistent increase in throughout study rise predominantly stems influences climate change intensification Antarctic Oscillation (AAO) events. As...
Ocean wave swell generated in the vicinity of Campbell Island Southern is tracked along Great Circle paths across Pacific Ocean. Data from a buoy at provides data on directional spectrum generation region. The measured locations series 19 using Sentinel-1 SAR and CFOSAT satellite data. WAVEWATCH III spectral model used as diagnostic tool to investigate physical processes active propagation decay. results indicate that present day models over-estimate decay rate swell. Although these contain...
Tropical cyclone risks are expected to increase with climate change. One such risk is extreme ocean waves generated by surface winds from these systems. We use synthetic databases of both historical (1980-2017) and future (2015-2050) tropical tracks generate wind fields force a computationally efficient wave model estimate significant heights across all global basins. These data then used 1 in 100-year return period height for the under an SSP585 high emissions scenario. The results show...
Wind waves play a crucial role in coastal dynamics and can significantly impact sea levels, especially during extreme events. Ocean winds are changing as the Earth is warming, hence waves. The Australian Climate Service (https://www.acs.gov.au/), recognised wind element to support future climate mitigation adaptation strategies. wave projections are, however, plagued by uncertainties. One of primary sources uncertainty originates from resolution Coupled Model Intercomparison Project (CMIP)...
A holistic review is given of the Southern Ocean dynamic system, in context crucial role it plays global climate and profound changes experiencing. The focuses on connections between different components drawing together contemporary perspectives from research communities, with objective “closing loops” our understanding complex network feedbacks overall system. targeted at researchers physical science ambition broadening their knowledge beyond specific field facilitating better-informed...
<title>Abstract</title> This study investigates the influence of high-resolution CMIP6 10-meter surface wind fields on wave climate dynamics in South-East Australian region. We nest a regional unstructured grid spectral model within global state-of-the-art to conduct our modelling experiments. The primary objective is compare four distinct dynamical downscaling approaches similar GCM product: CMIP, AMIP, HighResMIP, and CORDEX downscaled ocean speed product corrected for SST sea ice bias...