On the surface circulation in the western Coral Sea and residence times in the Great Barrier Reef

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  • Séverine Choukroun
    Physics Department, School of Engineering and Physical Science James Cook University Townsville, Queensland Australia
  • Peter V. Ridd
    Physics Department, School of Engineering and Physical Science James Cook University Townsville, Queensland Australia
  • Richard Brinkman
    Australian Institute of Marine Science Townsville, Queensland Australia
  • Lachlan I. W. McKinna
    Physics Department, School of Engineering and Physical Science James Cook University Townsville, Queensland Australia

書誌事項

公開日
2010-06
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2009jc005761
公開者
American Geophysical Union (AGU)

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説明

<jats:p>Surface velocity observations from satellite tracked drifters made between 1987 and 2008 were used to resolve the surface circulation of the western Coral Sea, west of 158°E, and the Great Barrier Reef (GBR). The mean surface current map depicts well the major circulation patterns of the region, such as the position of the north Vanuatu and north Caledonia jets (NVJ and NCJ) and the western boundary currents. The North Queensland Current (NQC) and the East Australian Current (EAC) are well defined, flowing at speeds greater than 50 cm s<jats:sup>−1</jats:sup> to the north, south of 15°S and 19°S, respectively. The NQC/EAC is mainly formed by the NVJ/NCJ flows, respectively. The presence of the Queensland Plateau greatly affects the westward flow, causing a zone of weak and highly variable currents that extends from 15°S to 18°S between the Queensland Plateau and the GBR shelf. Of the 235 drifters that crossed the western Coral Sea, 75 entered the GBR. Analysis of the drifter trajectories inside the GBR reveals the presence of a northwestward circulation at speeds of 22 cm s<jats:sup>−1</jats:sup> north of 18°S and 0.5 cm s<jats:sup>−1</jats:sup> south of 18°S. Drifter travel times used to evaluate the water residence times within the GBR indicate residence times of a few weeks for most of the lagoon.</jats:p>

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