Journal article Open Access

The Effects of Wind Forcing on Surface Currents on the Continental Shelf Surrounding Rottnest Island

Jennifer Penton; Charitha Pattiaratchi

Surface currents play a major role in the distribution of contaminants, the connectivity of marine populations, and can influence the vertical and horizontal distribution of nutrients within the water column. This paper aims to determine the effects of sea breeze-wind patterns on the climatology of the surface currents on the continental shelf surrounding Rottnest Island, WA Australia. The alternating wind patterns allow for full cyclic rotations of wind direction, permitting the interpretation of the effect of the wind on the surface currents. It was found that the surface currents only clearly follow the northbound Capes Current in times when the Fremantle Doctor sets in. Surface currents react within an hour to a change of direction of the wind, allowing southerly currents to dominate during strong northerly sea breezes, often followed by mixed currents dominated by eddies in the inter-lying times.

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  • Feng, M., Meyers, G., Pearce, A., Wijffels, S., 2003. Annual and interannual variations of the Leeuwin Current at 32degrees South. Journal of Geophysical Research, Vol. 108, No. C11, 3355, doi: 10.1029/2002JC001763.
  • GOOS (global ocean observing system), 2011; (http://gosic.org/ios/MATRICES/ECV/OCEAN/SURFACE/ECVGCOS- OCEAN-SURFACE-current.htm).
  • Gurgel, K.W., Antonischki, G., Essen, H.H., Schlick, T., 2000. Wellen Radar (WERA): a new ground-wave HF radar for ocean remote sensing. (www:http://ifmaxp1.ism.uni-hamburg.de/scawvex.htmlx).
  • Halverson, M.J., Ohlmann, J.C., Johnson, M.A., Pegau, W.S., 2011. Disruption of a cyclonic eddy circulation by wind stress in Prince William Sound,Alaska, Continental Shelf Research, doi:10.1016/j.csr.2011.12.002.
  • Inman, D.L. and Filloux, J., 1960. Beach cycle related to the tide and local wind regime. Journal of Geology, 68, 225,231.
  • Largier J. L. 2003. Considerations in estimating larval dispersal distances from oceanographic data. Ecol. Appl. Vol. 13, pp. 71-89.
  • Masselink, G. and Pattiaratchi, C.B., 1998a. Morphodynamic impact of sea breeze activity on a beach with cusp morphology. Journal of Coastal Research, 14(2), 393-409.
  • Masselink, G., and Pattiaratchi, C.B., 2001a. Characteristics of the sea breeze system in Perth Western Australia, and its effect on the near shore wave climate. Journal of Coastal Research, 17(1), 173-187.
  • Paduan, J.D., Graber, H.C., 1997. Introduction to High-Frequency Radar: Reality and Myth. Oceanography, Vol. 10, No. 2, pp. 36-39. [10] Pattiaratchi, C., Hegge, B., Gould, J. and Eliot, I., 1997. Impact of seabreeze activity on nearshore and foreshore processes in southwestern Australia. Continental Shelf Research, 17(13), 1539-1560. [11] Pearce, A.F., Griffiths, R.W., 1991. The Mesoscale Structure of the Leeuwin Current: A Comparison of Laboratory Models and Satellite Imagery. Journal of Geophysical Research, Vol. 96, No. C9, pp. 16,739- 16,757, doi: 10.1029/91JC01712. [12] Rao, R.R., Molinari, R.L., Festa, J.F., 1989. Evolution of the Climatological Near-Surface Thermal Structure of the Tropical Indian Ocean. 1. Description of Mean Monthly Mixed Layer Depth, and Sea Surface Temperature, Surface Current, and Surface Meteorological Fields. Journal of Geophysical Research, Vol. 94, Mo. C8, pp 10,801 - 10,815. [13] Sentchev, A., Forget, P., Barbin, Y., Yaremchuk, M., Surface circulation in the Iroise Sea (W. Brittany) from high resolution HF, article in press. [14] Weersing K., Toonen R. J. 2009. Population genetics, larval dispersal, and connectivity in marine systems. Mar. Ecol. Prog. Ser. 393, 1-12. [15] White, C., Selkoe, K.A., Watson, J., Siegel, D.A., Zacherl, D.C., Toonen, R.J., 2010. Ocean currents help explain population genetic structure. Proceedings of the Royal Society, Biological Sciences, Vol. 277, pp. 1685-1694. Doi: 10.1098/rspb.2009.2214.
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