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The East Australian current and property transport at 27S from 2012 to 2013

Citation

Sloyan, BM and Ridgeway, KR and Cowley, R, The East Australian current and property transport at 27 S from 2012 to 2013, Journal of Physical Oceanography, 46 pp. 993-1008. ISSN 0022-3670 (2016) [Refereed Article]


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Copyright 2016 American Meteorological Society

DOI: doi:10.1175/JPO-D-15-0052.1

Abstract

The East Australian Current (EAC) is the complex and highly energetic poleward western boundary current of the South Pacific Ocean. A full-depth current meter and property (temperature and salinity) mooring array was deployed from the continental shelf to the abyssal waters off Brisbane Australia (27S) for 18 months from April 2012 to August 2013. The EAC mooring array is an essential component of the Australian Integrated Marine Observing System (IMOS). During this period the EAC was coherent with an eddy kinetic to mean kinetic energy ratio of less than 1. The 18-month, mean, poleward-only mass transport above 2000 m is 22.1 7.5 Sverdrups (Sv; 1 Sv ≡ 106 m3 s−1). The mean, poleward-only heat transport and flow-weighted temperature above 2000 m are −1.35 0.42 PW and 15.33C, respectively. A difference in the poleward-only and net poleward mass and heat transports above 2000 m of 6.3 Sv and 0.24 PW reflects the presence of an equatorward EAC retroflection at the eastern (offshore) end of the mooring array. A complex empirical orthogonal function (EOF) analysis of the along-slope velocity anomalies finds that the first two modes explain 72.1% of the velocity variance. Mode 1 is dominant at periods of approximately 60 days, and mode 2 is dominant at periods of 120 days. These dominant periods agree with previous studies in the Tasman Sea south of 27S and suggest that variability of the EAC in the Tasman Sea may be linked to variability north of 27S.

Item Details

Item Type:Refereed Article
Keywords:circulation/dynamics, boundary currents
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Sloyan, BM (Dr Bernadette Sloyan)
ID Code:118799
Year Published:2016
Web of Science® Times Cited:36
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-07-20
Last Modified:2017-10-24
Downloads:96 View Download Statistics

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