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首页> 外文期刊>Journal of Physical Oceanography >Surface Geostrophic Circulation of the Mediterranean Sea Derived from Drifter and Satellite Altimeter Data
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Surface Geostrophic Circulation of the Mediterranean Sea Derived from Drifter and Satellite Altimeter Data

机译：来自漂移和卫星高度计数据的地中海海面地转环流

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摘要

Drifter observations and satellite-derived sea surface height data are used to quantitatively study the surface geostrophic circulation of the entire Mediterranean Sea for the period spanning 1992-2010. After removal of the wind-driven components from the drifter velocities and low-pass filtering in bins of 1° x 1° x 1 week, maps of surface geostrophic circulation (mean flow and kinetic energy levels) are produced using the drifter and/or satellite data. The mean currents and kinetic energy levels derived from the drifter data appear stronger/higher with respect to those obtained from satellite altimeter data. The maps of mean circulation estimated from the drifter data and from a combination of drifter and altimeter data are, however, qualitatively similar. In the western basin they show the main pathways of the surface waters flowing eastward from the Strait of Gibraltar to the Sicily Channel and the current transporting waters back westward along the Italian, French, and Spanish coasts. Intermittent and long-lived subbasin-scale eddies and gyres abound in the Tyrrhenian and Algerian Seas. In the eastern basin, the surface waters are transported eastward by several currents but recirculate in numerous eddies and gyres before reaching the northward coastal current off Israel, Lebanon, and Syria and veering westward off Turkey. In the Ionian Sea, the mean geostrophic velocity maps were also produced separately for the two extended seasons and for multiyear periods. Significant variations are confirmed, with seasonal reversals of the currents in the south and changes of the circulation from anti-cyclonic (prior to 1 July 2007) to cyclonic and back to anticyclonic after 31 December 2005.
机译：漂流观测和卫星衍生的海面高度数据用于定量研究整个1992年至2010年期间整个地中海的地表营养旋转。从漂移速度中去除风力驱动成分并在1°x 1°x 1周的箱中进行低通过滤后，使用漂移和/或生成地表营养循环图（平均流量和动能水平）卫星数据。与从卫星高度计数据获得的平均电流和动能水平相比，从漂移数据获得的平均电流和动能水平似乎更强/更高。然而，根据漂移数据以及通过漂移数据和高度计数据的组合估算的平均环流图在质量上相似。在西部盆地，它们显示了从直布罗陀海峡向西流向西西里海峡的地表水向东流动的主要路径，以及当前沿意大利，法国和西班牙沿海向西运回的水。在第勒尼安海和阿尔及利亚海中存在着断断续续且寿命长的亚盆地规模的涡旋和回旋。在东部盆地，地表水由数股水流向东输送，但在众多涡流和旋流中再循环，然后到达以色列，黎巴嫩和叙利亚以外的北部沿海水流，并向西偏离土耳其。在爱奥尼亚海，还分别绘制了两个延长季节和多年期的平均地转速度图。随着南部海流的季节性逆转以及从反气旋（2007年7月1日之前）到气旋并在2005年12月31日之后又回到反气旋的循环变化，确认了重大变化。

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  • 来源
    《Journal of Physical Oceanography》 |2012年第6期|p.973-990|共18页
  • 作者

    Pierre-Marie Poulain; Milena Menna; Elena Mauri;

  • 作者单位

    Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante, 42/c, 34010 Sgonico, Trieste, Italy;

    Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy;

    Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy;

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