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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Recent Decadal Change in the North Atlantic Subtropical Underwater Associated With the Poleward Expansion of the Surface Salinity Maximum
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Recent Decadal Change in the North Atlantic Subtropical Underwater Associated With the Poleward Expansion of the Surface Salinity Maximum

机译：北大西洋亚热带水下近代变化与地表盐度最大的膨胀膨胀相关

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Yu et al. (2017, ) reported that the annual mean sea surface salinity maximum (SSS-max) in the North Atlantic expanded northward by 0.35 0.11 degrees per decade over the 34-year data record (1979-2012). The expansion shifted and expanded the ventilation zone northward and increased the production of the Subtropical Underwater (STUW). As a result, the STUW became deeper, thicker, and saltier. In this study, the seasonal characteristics of the poleward expansion of the North Atlantic SSS-max and their effects on the STUW are examined. The results show that the SSS-max expansion occurred primarily during boreal spring (April, May, and June) and expanded northward by 0.43 0.21 degrees per decade over the 34-year period. The annual volume of the STUW increased by 0.21 0.09 10(14) m(3) per decade over the same period, and the spring (April, May, and June) volume increased by 0.31 0.02 10(14) m(3) per decade (a relative increase of 48 +/- 1%). The characteristics of the decadal changes in STUW were attributable to the increased subduction rate associated with the northward expansion of the SSS-max. The annual subduction rate increased by 0.29 +/- 0.07 Sv per decade over the 34 years, and the greatest increase of 1.73 +/- 0.61 Sv per decade occurred in April. The change in subduction associated with the expansion of the SSS-max appeared to be consistent with the Atlantic Multidecadal Oscillation.
机译：yu等。 （2017年）报告说，在34年的数据记录（1979-2012）中，北大西洋中北大西洋的年平均海面盐度最大（SSS-Max）扩大0.35 0.11度。膨胀向北移动并膨胀通风区，增加了亚热带水下的生产（STUW）。结果，STUW变得更深，更厚，咸。在这项研究中，检查了北大西洋SSS-MAX的极向扩展的季节性特征及其对STUW的影响。结果表明，SSS-Max扩展主要发生在鲍瓦尔春季（4月，5月，6月）期间，在34年期间，每十年每十年向北扩展0.43 0.21度。同期，每年的STUW的年度体积增加0.21 0.09 10（3）（3），春季（4月，5月和6月）体积增加0.31 0.02 10（14）米（3）十年（相对增加48 +/- 1％）。 STUW的Decadal变化的特征是归因于与SSS-Max的向北扩展相关的俯冲率增加。 34年来，每年增加每年0.29 +/- 0.07 SV，4月份每年最大增长1.73 +/- 0.61秒。与SSS-MAX的扩展相关的俯冲的变化似乎与大西洋多视野振荡一致。

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