eCite Digital Repository
The East Australian current and property transport at 27°S 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]
 | PDF 2Mb |
Copyright Statement
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 (27°S) 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 15.33°C, 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 27°S and suggest that variability of the EAC in the Tasman Sea may be linked to variability north of 27°S.
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: | 45 |
| Deposited By: | Sustainable Marine Research Collaboration |
| Deposited On: | 2017-07-20 |
| Last Modified: | 2017-10-24 |
| Downloads: | 125 View Download Statistics |
Repository Staff Only: item control page