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In Situ Measurements of Circulation Features Influencing Cross-Shelf Transport Around Northwest Cuba

机译：循环功能的原位测量影响西北古巴跨货架运输

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摘要

We analyzed circulation processes sampled in the Gulf of Mexico in May 2016 by the National Oceanic and Atmospheric Administration (NOAA) Ship Nancy Foster. This data set is one of the first in situ surveys in Cuban waters available to the international community. Along northwest Cuba, these data suggested coastal upwelling and revealed, for the first time, a ～50 km diameter Cuban ANticyclonic (CubAN) eddy and a ～25 km diameter cyclonic eddy, which together advected upwelled waters offshore. The CubAN eddy was associated with downwelling, and the cyclonic eddy with upwelling. At the western tip of Cuba, local currents were predominantly anticyclonic, presumably due to the proximity of the retracted Loop Current, with limited export of coastal waters. Conversely, additional data from two cruises when the Loop Current was extended showed cyclonic circulation within upwelling filaments extending far offshore. These processes are important, as they can potentially entrain marine organism larvae from local reefs into the Loop Current system and to other reef ecosystems of the region. They might also affect the transport of pollutants, as hydrocarbons in case of a spill in Cuban waters. The 2016 cruise took place after the shedding of a Loop Current Ring, which involved an unusually large (～250 km) cyclonic frontal eddy. The eddy signature was observed down to 1,200 m depth, deeper than the Loop Current. A surface drifter revealed a low relative vorticity (0.19 f) inside the eddy. Along its southern edge, filaments exported from the Campeche Bank were associated with high relative chlorophyll a at 3,060 m depth.
机译：我们分析了2016年5月在2016年5月在2016年5月在2016年5月在墨西哥境内进行的流通过程（NOAA）南希·培养。该数据集是国际社会可用的古巴水域第一个原位调查之一。沿着西北古巴，这些数据建议沿海上升和透露，第一次达到古巴古巴（Cuban）涡流（古巴）涡流和直径〜25公里的循环涡流，其中沿海方向满满的水域。古巴艾迪与沉船有关，以及越来越多的循环涡流。在古巴的西尖，局部电流主要是防湿的，可能是由于缩回回路电流的接近，沿海水的出口有限。相反，当延长回路电流时，两个巡航的额外数据显示了在远海延伸的升高长丝内的循环循环。这些过程很重要，因为它们可以将海洋生物体幼虫从本地珊瑚礁纳入回路电流系统和该区域的其他礁生态系统。它们也可能影响污染物的运输，因为古巴水域溢出的碳氢化合物。 2016年巡航在脱落电流环之后发生，涉及异常大（〜250公里）的循环正面涡流。涡旋签名被观察到1,200米深度，比环电流更深。表面漂移器在涡流内显示出低相对涡度（0.19 f）。沿着南部边缘，从坎佩基银行出口的长丝与3,060米深度的高相对叶绿素A相关联。

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  • 来源
    《Oceanographic Literature Review》 |2020年第9期|1972-1972|共1页
  • 作者

    M. Le Henaff; V.H. Kourafalou; Y. Androulidakis;

  • 作者单位

    Atlantic Oceanographic and Meteorological Laboratory (AOML) NOAA Miami FL United States;

    Atlantic Oceanographic and Meteorological Laboratory (AOML) NOAA Miami FL United States;

    Atlantic Oceanographic and Meteorological Laboratory (AOML) NOAA Miami FL United States;

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