Temporal and Spatial variability of the East Australian Current Bernadette Sloyan, Ken Ridgway, Bec Cowley AMSA 2014.

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Presentation transcript:

Temporal and Spatial variability of the East Australian Current Bernadette Sloyan, Ken Ridgway, Bec Cowley AMSA 2014

EAC Variability | Bernadette Sloyan IMOS/CMAR EAC Mooring array The East Australian Current (EAC), off eastern Australia, is the complex and highly energetic western boundary current system of the South Pacific subtropical gyre. The EAC is the dominant mechanism for the redistribution of heat between the ocean and atmosphere in the Australian region. Changes in the dynamics and strength of the EAC due to large-scale forcing changes may potentially result in significant regional climate and marine ecosystem changes in Australia and along the eastern Australian seaboard, respectively. The EAC mooring array will: Determine the mean and time-varying transport of the EAC as a component of the global circulation system at 26°S EAC and climate change impacts on marine life Provide observations of the EAC that enable an improved representation of the EAC and its eddy field in a range of ocean models

EAC mooring array off Brisbane EAC Variability | Bernadette Sloyan

Deployment Voyage: SS April 2012

Recovery Voyage: SS August 2013 EAC Variability | Bernadette Sloyan

Velocity and Southward Transport – m EAC Variability | Bernadette Sloyan

EAC Velocity Mean and Standard Deviation EAC Variability | Bernadette Sloyan  18-month mean between April 2012 and August 2013

EAC Property Fluxes EAC Variability | Bernadette Sloyan Upper 2000m southward Total above 2000m Mean 25.3 Sv EAC Heat flux 1.6PW (Gulf Stream 1.3PW at Florida Strait) Mean 1.6 PW

Thank you CSIRO Ocean and Atmosphere Flagship Bernadette Sloyan t OCEAN AND ATMOSPHERE FLAGSHIP