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Temporal and Spatial variability of theEast Australian Current
Bernadette Sloyan, Ken Ridgway, Bec Cowley AMSA 2014
EAC Variability | Bernadette Sloyan
IMOS/CMAR EAC Mooring arrayThe 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
EAC Variability | Bernadette Sloyan
Deployment Voyage: SS2012-01 April 2012
EAC Variability | Bernadette Sloyan
Recovery Voyage: SS2013-05 August 2013
EAC Variability | Bernadette Sloyan
Velocity and Southward Transport – 0-2000m
EAC Variability | Bernadette Sloyan
EAC Velocity Mean and Standard Deviation
18-month mean between April 2012 and August 2013
EAC Variability | Bernadette Sloyan
EAC Property Fluxes
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 youCSIRO Ocean and Atmosphere FlagshipBernadette Sloyan
t +61 3 6232 5152e [email protected]
OCEAN AND ATMOSPHERE FLAGSHIP
