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A Trigger Mechanism for Loop Current Ring Separations

机译：回路电流环分离的触发机制

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摘要

The Loop Current in the Gulf of Mexico sheds large anticyclonic rings on an irregular basis. The authors attempt to show what actually triggers the ring separations. Pulses of increased transport through the Florida Straits, as observed by the cable data, are observed prior to each ring separation. This finding is consistent over all separation events observed in the satellite altimetry record. The pulses of transport occur approximately two to four weeks before the rings separate. The increase in transport is usually accompanied by a corresponding increase in offshore sea level, suggesting forcing from the open ocean. The delay times between the pulses of increased transport and ring separations can be shown to be significantly correlated with the length of the Loop Current. Mean sea levels over the Caribbean and Gulf also peak before the separations, on average.
机译：墨西哥湾的环流不规则地散发出大型的反气旋环。作者试图证明实际上触发环分离的原因。如电缆数据所示，在每次环分离之前，都会观察到穿过佛罗里达海峡的运输增加的脉冲。这一发现在卫星测高记录中观察到的所有分离事件中都是一致的。运输的脉冲发生在环分离之前约两到四个星期。运输的增加通常伴随着近海海平面的相应增加，这表明来自公海的强迫。可以看出，增加传输脉冲和环间隔的脉冲之间的延迟时间与环路电流的长度显着相关。平均而言，在分隔之前，加勒比海和海湾的平均海平面也达到峰值。

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  • 来源
    《Journal of Physical Oceanography》 |2010年第5期|900-913|共14页
  • 作者

    Wilton Sturges; Nicholas G. Hoffmann; Robert R. Leben;

  • 作者单位

    Department of Oceanography, The Florida State University, Tallahassee, FL 32306-4320;

    Colorado Center for Astrodynamics Research, University of Colorado, Boulder, Colorado;

    Colorado Center for Astrodynamics Research, University of Colorado, Boulder, Colorado;

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