Annual cycling in wind, temperature and along shore currents on the Sydney shelf

Julie E. Wood, Moninya Roughan, Peter M. Tate

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

2 Citations (Scopus)

Abstract

The seasonality of coastal wind, temperature and along shore currents on the continental shelf adjacent to Sydney is investigated using more than three years of data. These data were obtained from two moorings (maintained as part of the NSW Integrated Marine Observing System) and a third, in-shore mooring (maintained under contract by Sydney Water). We detected an asymmetrical warming and cooling pattern in the annual cycle of the temperature with gradual heating in summer and rapid cooling. There is a marked difference in the temperature cycle between the interior and at depth. The annual cycle in the along shelf currents and wind explained less than 5 % of the variability. We discuss the merit of two different regression models used in the analysis and their ability to fit the annual cycle in the data. Off the coast of Sydney, the impact of warm core and cold core eddies on the shelf reduces the variability that is explained by the annual cycle in the observed signal. Furthermore, we have identified a non-stationary process with a period of peak energy between 90 and 120 days in the along shelf currents. This corresponds to the period that eddies are shed from the East Australian Current indicating a link between eddy formation and interaction with the continental shelf in the Sydney region.

Original languageEnglish
Title of host publicationCoasts and Ports 2013
Place of PublicationBarton, ACT
PublisherNational Committee on Applied Mechanics
Pages866-871
Number of pages6
Publication statusPublished - 2013
EventCoasts and Ports 2013 - Sydney, NSW, Australia
Duration: 11 Sep 201313 Sep 2013

Other

OtherCoasts and Ports 2013
CountryAustralia
CitySydney, NSW
Period11/09/1313/09/13

Keywords

  • East Australian Current
  • Integrated Marine Observing System
  • Shelf processes
  • Western boundary current

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