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Effect of varied atmospheric stability on sea surface drag in shallow seas and its impact on wind-wave growth

Author

Listed:
  • R. Rajesh Kumar
  • B. Prasad Kumar
  • A. Satyanarayana
  • D. Bala Subrahamanyam
  • A. Rao
  • S. Dube

Abstract

This work reports an efficient bulk formulation of sea surface drag that incorporates effect of dynamic stability under varied atmospheric forcing. The proposed formulation exhibits a polynomial dependence of wind speed on air–sea temperature difference based on statistical analysis. Quality checked meteorological and oceanographic data from four shallow water buoys located off Korean seas having measurements at an interval of every 1 h were used for this study. The analyses of in situ records for this region suggest stability ranging from highly stable to very unstable conditions. Importance of this proposed formulation is better reflected during unstable condition where other popular bulk formulations fail. In addition, importance and impact of such a study on wind-wave growth using the state-of-art wave model was also investigated. Finally, we advocate a new drag formulation, which accounts for varied atmospheric stability and suggest that this should be considered as an essential pre-requisite for ocean modeling studies. Copyright Springer Science+Business Media B.V. 2009

Suggested Citation

  • R. Rajesh Kumar & B. Prasad Kumar & A. Satyanarayana & D. Bala Subrahamanyam & A. Rao & S. Dube, 2009. "Effect of varied atmospheric stability on sea surface drag in shallow seas and its impact on wind-wave growth," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 49(2), pages 213-224, May.
    • Handle: RePEc:spr:nathaz:v:49:y:2009:i:2:p:213-224
    DOI: 10.1007/s11069-008-9279-6
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