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首页> 外文期刊>Journal of Physical Oceanography >Buoyant Eddies Entering the Labrador Sea Observed with Gliders and Altimetry
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Buoyant Eddies Entering the Labrador Sea Observed with Gliders and Altimetry

机译：滑翔机和测高仪观察到的浮力进入拉布拉多海

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摘要

Intense, buoyant anticyclonic eddies spawned from the west Greenland boundary current were observed with high-resolution autonomous Seaglider hydrography and satellite altimetry as they entered the Labrador Sea interior. Surveys of their internal structure establish the transport of both low-salinity water in the upper ocean and warm, saline Irminger water at depth. The observed eddies can contribute significantly to the rapid restratification of the Labrador Sea interior following wintertime deep convection. These eddies have saline cores between 200 and 1000 m, low-salinity cores above 200 m, and a velocity field that penetrates to at least 1000 m, with 0-1000-m average speeds exceeding 40 cm s~(-1). Their trajectory, together with earlier estimates of the gyre circulation, suggests why the observed region of deep convection is so small and does not occur where wintertime cooling by the atmosphere is most intense. The cyclostrophic surface velocity field of the anticylones from satellite altimetry matched well with in situ dynamic height baroclinic velocity calculations.
机译：当高分辨率格陵兰西部边界水流进入拉布拉多海内部时，它们通过高分辨率的自主式海格里德水文仪和卫星测高仪观测到了强烈的，强烈的反气旋涡流。通过对其内部结构的调查，可以确定高海拔海洋中的低盐度水和深处的温暖的盐水艾明格水的运移。冬季深对流之后，观测到的涡流可以对拉布拉多海内部的快速再定形做出重大贡献。这些涡流具有200至1000 m的盐碱岩心，200 m以上的低盐度岩心，以及渗透到至少1000 m的速度场，其中0-1000-m的平均速度超过40 cm s〜（-1）。它们的轨迹以及早期对回旋环流的估计表明了为什么观察到的深对流区域如此之小，而在冬季最受大气冷却的地方却不会发生。卫星测高仪反旋环的旋流表面速度场与原位动态高度斜压速度计算非常吻合。

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