A5063516549- Oceanographic and Atmospheric Processes
- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Marine and fisheries research
- Geological formations and processes
- Coastal and Marine Dynamics
- Marine and coastal ecosystems
- Marine animal studies overview
- Avian ecology and behavior
- Marine and coastal plant biology
- Geology and Paleoclimatology Research
- Geophysics and Gravity Measurements
- Marine Bivalve and Aquaculture Studies
- Turtle Biology and Conservation
- Geological and Geophysical Studies
- Fish Ecology and Management Studies
- Arctic and Antarctic ice dynamics
- Coastal and Marine Management
- Fire effects on ecosystems
- Coastal wetland ecosystem dynamics
- Underwater Acoustics Research
- Ocean Acidification Effects and Responses
- Hydrology and Sediment Transport Processes
- Coral and Marine Ecosystems Studies
- Flood Risk Assessment and Management
The University of Western Australia
2015-2024
Australian Institute of Marine Science
2016-2022
Ocean Institute
2015-2020
Institute of Mining
2015-2016
Government of Western Australia
2016
University of California, Santa Barbara
2003
An extreme marine heat wave which affected 2000 km of the midwest coast Australia occurred in 2010/11 austral summer, with sea-surface temperature (SST) anomalies 2-5°C above normal climatology. The was influenced by a strong Leeuwin Current during an La Niña event at global warming hot spot Indian Ocean. This had significant effect on ecosystem changes to seagrass/algae and coral habitats, as well fish kills southern extension range some tropical species. has been exacerbated above-average...
Parameters derived from remote sensing that can be used to assess fire danger include surface reflectance, live and dead biomass, canopy water content, species composition, fuel state. Spectral bands wavelength locations of traditional multispectral data make assessment in Mediterranean shrublands difficult, although parameters have been Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data. We compare nearly simultaneous acquisition Hyperion AVIRIS evaluate spaceborne monitoring...
We examined the effect of artificial light on near shore trajectories turtle hatchlings dispersing from natal beaches. Green ( Chelonia mydas ) were tagged with miniature acoustic transmitters and their movements tracked within an underwater array 36 receivers placed in zone. A total 40 tracked, 20 which subjected to during transit array. At same time, we measured current speed direction, highly variable between experimental nights treatments. Artificial lighting affected hatchling...
Abstract. Laboratory experiments were conducted in an open channel flume with a flat sandy bed to examine the role of turbulence on sediment resuspension. An acoustic Doppler velocimeter (ADV) was used measure instantaneous three-dimensional velocity components and backscatter as proxy suspended concentration. Estimates transport assume that there is mean critical needs be exceeded before initiated. This approach does not consider turbulent flow field may initiate resuspension through...
Abstract In Shark Bay, a large inverse estuary in Western Australia, longitudinal density gradients establish gravitational circulation that is important for Bay‐ocean exchange and transport of biological material such as larvae. The relative contributions energy from wind tidal mixing on the control vertical stratification were investigated using three‐dimensional baroclinic ocean model (General Estuarine Transport Model, GETM). this estuary, effects winds tides found to be similar...
Abstract The Australian marine research, industry, and stakeholder community has recently undertaken an extensive collaborative process to identify the highest national priorities for wind-waves research. This was under auspices of Forum Operational Oceanography Surface Waves Working Group. main steps in were first, soliciting possible research questions from via online survey; second, reviewing at a face-to-face workshop; third, ranking by individuals. resulted 15 identified priorities,...
A new merged high-frequency radar (HFR) data set collected using SeaSonde and WERA (WEllen RAdar) systems was used to examine the ocean surface circulation at diurnal, seasonal inter-annual time scales along south-west coast of Australia (SWWA), between 29°–32° S. Merging performed after resampling on coarser HFR grid averaging from two in area common overlap. Direct comparisons vectors their overlapping areas provided scalar vector correlation values range Ru = [0.24, 0.76]; Rv [0.39,...
Quality-control procedures and their impact on data quality are described for the High-Frequency Ocean Radar (HFR) network in Australia, particular commercial phased-array (WERA) HFR type. Threshold-based quality-control were used to obtain radial velocity signal-to-noise ratio (SNR), however, values set through quantitative analyses with independent measurements available within coverage, when available, or from long-term statistics. An artifact removal procedure was also applied spatial...
Transport of water between the coast and deeper ocean, across continental shelf, is an important process for distribution biota, nutrients, suspended dissolved material on shelf. Presence denser inner shelf results in a cross-shelf density gradient that drives gravitational circulation with offshore transport along sea bed defined as Dense Shelf Water Cascade (DSWC). Analysis field data, collected from multiple ocean glider data missions around Australia, confirmed under range wind tidal...
Sea turtles found stranded on beaches are often rehabilitated before being released back into the wild. The location and date of release is largely selected an informal basis, which may not maximise chance survival. As oceanic conditions have a large influence movements neonate sea turtles, this study aimed to identify best locations months that would assist in their transport by ocean currents habitat thermal required for A particle tracking model, forced surface velocity fields were used...
In Shark Bay, a large hypersaline bay in Western Australia, longitudinal density gradients force gravitational circulation that is important for Bay-ocean exchange. First-time observations of vertical stratification and velocity are presented, confirming the presence steady, near-bed dense water outflow from Bay’s northern Geographe Channel persisted through all stages tide. Outflow velocities were 2–3 times stronger than outflows recorded previously Naturaliste (in west), more resistant to...
Along the majority of Australian shallow coastal regions, summer evaporation increases salinity waters, and subsequently in autumn/winter, nearshore waters become cooler due to heat loss. This results formation horizontal density gradients with increasing toward coast that generates gravity currents known as dense shelf water cascades (DSWCs) flowing offshore along sea bed. DSWCs play important role ecological biogeochemical processes through transport dissolved suspended materials offshore....
Mahjabin, T.; Pattiaratchi, C., and Hetzel, Y., 2016. Factors influencing the occurrence of Dense Shelf Water Cascades in Australia. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., McCarroll, R.J. (eds.), Proceedings 14th International Coastal Symposium (Sydney, Australia). Journal Research, Special Issue, No. 75, pp. 527–531. Coconut Creek (Florida), ISSN 0749-0208.Transport inshore waters suspended material off continental shelf by (DSWC) has important ecological biogeochemical...
Wandres, M., Pattiaratchi, C., Wijeratne, E.M.S., Hetzel, Y., 2016. The influence of the subtropical high-pressure ridge on Western Australian wave climate. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings 14th International Coastal Symposium (Sydney, Australia). Journal Research, Special Issue, No. 75, pp. 567–571. Coconut Creek (Florida), ISSN 0749-0208.Understanding climate a region is critical for its coastal zone management. southwest (SWWA)...
Significant marine heatwaves (MHWs) developed along the Western Australian coast in 1999 and 2011. Despite ecosystem losses southwards occurrence of many tropical fish species during after extreme MHW 2011, there have been few studies on effects this seabirds, no biological impacts related to reported. Using data from 1986-2019, we investigated these events breeding outcomes, body condition, diet composition, population size mortality little penguins Penguin Island, temperate waters off...
Sea level exerts a fundamental influence on the intertidal zone, where organisms are subject to immersion and emersion at varying timescales frequencies. While emersed, exposed atmospheric stressors which show marked diurnal seasonal variability, therefore daily timing of low water is key determinant survival growth in this zone. Using example shallow coral reefs, coincidence with selected was investigated for eight locations around Australian coastline. Hourly levels (1992 – 2016) from...
In Shark Bay, a large hypersaline bay in Western Australia, longitudinal density gradients force gravitational circulation that is important for Bay-ocean exchange. Observations of vertical stratification and velocity are presented, confirming steady near-bed dense water outflow from Bay’s northern Geographe Channel persisted through all stages the tide. Outflow velocities were 2–3 times stronger than outflows recorded previously Naturaliste (in west) more resistant to...