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Modification of the loop current warm core eddy by Hurricane Gilbert (1988)

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  • Xiaodong Hong
  • Simon Chang
  • Sethu Raman

Abstract

Numerical investigation of Hurricane Gilbert (1988) effect on the Loop Current warm core eddy (WCE) in the Gulf of Mexico is performed using the Modular Ocean Model version 2 (MOM2). Results show that the storm-induced maximum sea surface temperature (SST) decrease in Gilbert’s wake is over 2.5°C, as compared with the 3.5°C cooling in the absence of the WCE. The near-inertial oscillation in the wake reduces significantly in an along-track direction with the presence of the WCE. This effect is also reflected between the mixed layer and the thermocline, where the current directions are reversed with the upper layer. After two inertial periods (IP), the current reversal is much less obvious. In addition, it is demonstrated that Hurricane Gilbert wind stress increases the current speed of the WCE by approximate 133%. With the forcing of Gilbert, the simulated translation direction and speed of the WCE towards the Mexican coast are closer to the observed (42% more accurate in distance and 78% more accurate in direction) compared with the simulation without the Gilbert forcing. The simulated ocean response to Gilbert generally agrees with the recent observations in Hurricane Fabian. Copyright Springer Science+Business Media, Inc. 2007

Suggested Citation

  • Xiaodong Hong & Simon Chang & Sethu Raman, 2007. "Modification of the loop current warm core eddy by Hurricane Gilbert (1988)," 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. 41(3), pages 501-514, June.
    • Handle: RePEc:spr:nathaz:v:41:y:2007:i:3:p:501-514
    DOI: 10.1007/s11069-006-9057-2
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