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首页> 外文期刊>Ocean Dynamics >Rapid dissipation of a Loop Current eddy due to interaction with a severe Gulf of Mexico hurricane
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Rapid dissipation of a Loop Current eddy due to interaction with a severe Gulf of Mexico hurricane

机译：由于与墨西哥严重飓风的严重湾的相互作用，快速耗散环流涡流

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摘要

Loop Current Eddies (LCEs) are warm-core, anticyclonic rings that shed from the Loop Current and migrate westward providing kinetic and potential energy to the Gulf of Mexico (GoM). Typically, LCEs dissipate through interaction with the western shelf slope, other mesoscale eddies, and diapycnal mixing. Here, we explore a case where a LCE, Eddy Poseidon, encountered Hurricane Harvey in the northwest GoM in August 2017 causing its rapid dissipation. This interaction significantly reduced Poseidon's areal extent, dynamic height, heat content, and kinetic energy. Using in situ observations and numerical model output, we explore Poseidon's dissipation and show it was caused by a combination of processes. A rigorous cold wake formed along Poseidon's east, strong hurricane-induced surface currents transported shelf water towards the eddy on its north and west sides, and heat was lost throughout the water column from Poseidon's southern edge. Horizontal advection was greatest at the surface and decreased with depth-27% of heat lost from Poseidon occurred in the top 100 m and 47% from the top 200 m.
机译：环流电流漩涡（LCE）是暖核，从环电流脱落的反气旋环，向西迁移向墨西哥湾（GOM）提供动力学和潜在的能量。通常，通过与西部架子坡，其他Mescre Eddies和延迟混合的相互作用来消散。在这里，我们探讨了2017年8月在西北GOM遇到飓风哈维飓风哈维的案例，导致快速耗散。这种相互作用显着降低了Poseidon的面积，动态高度，热含量和动能。使用原位观察和数值模型输出，我们探讨了波塞冬的耗散并表现出由过程的组合引起的。沿着波塞冬的东部形成严格的冷味，强大的飓风诱导的表面电流将搁置水朝向北部和西侧的漩涡，从波塞冬的南部边缘丢失了整个水柱中的热量。横向平流在地面最大，并且随着Poseidon的深度损失的深度 - 27％的热量发生在前100米和47％，从前200米。

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