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首页> 外文期刊>Journal of Physical Oceanography >Mindanao Current and Undercurrent: Thermohaline Structure and Transport from Repeat Glider Observations
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Mindanao Current and Undercurrent: Thermohaline Structure and Transport from Repeat Glider Observations

机译：棉兰老岛电流和暗流：重复滑翔机观测的热盐结构和运移

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摘要

Autonomous underwater Spray gliders made repeat transects of the Mindanao Current (MC), a low-latitude western boundary current in the western tropical North Pacific Ocean, from September 2009 to October 2013. In the thermocline (< 26 kgm(-3)), the MC has a maximum velocity core of -0.95 m s(-1), weakening with distance offshore until it intersects with the intermittent Mindanao Eddy (ME) at 129.25 degrees E. In the subthermocline (> 26 kg m(-3)), a persistent Mindanao Undercurrent (MUC), with a velocity core of 0.2 m s(-1) and mean net transport, flows poleward. Mean transport and standard deviation integrated from the coast to 130 degrees E is -19 +/- 3.1 Sv (1 Sv equivalent to 10(6) m(3) s(-1)) in the thermocline and -3 +/- 12 Sv in the subthermocline. Subthermocline transport has an inverse linear relationship with the Nino-3.4 index and is the primary influence of total transport variability. Interannual anomalies during El Nino are greater than the annual cycle for sea surface salinity and thermocline depth. Water masses transported by the MC/MUC are identified by subsurface salinity extrema and are on isopycnals that have increased finescale salinity variance (spice variance) from eddy stirring. The MC/MUC spice variance is smaller in the thermocline and greater in the subthermocline when compared to the North Equatorial Current and its undercurrents.
机译：2009年9月至2013年10月，自主水下喷雾滑翔机在热带北太平洋西部的低纬度西部边界水流棉兰老海流（MC）上进行了重复横切。在热跃层（<26 kgm（-3））中， MC的最大速度核心为-0.95 ms（-1），随着离岸距离的增加而减弱，直到在129.25度E与间歇性棉兰老涡（ME）相交为止。在亚热线（> 26 kg m（-3））中，速度为0.2 ms（-1）且平均净输运速度的持续棉兰老岛暗流（MUC）极向流动。从海岸到130度E的平均迁移率和标准偏差在热跃层中为-19 +/- 3.1 Sv（1 Sv相当于10（6）m（3）s（-1））和-3 +/- 12 SV在亚热线中。亚热线转运与Nino-3.4指数成反比线性关系，是总转运变异性的主要影响因素。厄尔尼诺现象期间的年际异常大于海面盐度和温跃层深度的年度周期。由MC / MUC输送的水团通过地下盐度极值来识别，并且在涡旋搅动下具有增加的精细盐度方差（香料方差）的等密度曲线上。与北赤道洋流及其北流相比，MC / MUC香料变化在热跃层中较小，在亚热跃层中较大。

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