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首页> 外文期刊>Journal of Physical Oceanography >Decadal Changes in Meridional Overturning Circulation in the East Sea (Sea of Japan)
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Decadal Changes in Meridional Overturning Circulation in the East Sea (Sea of Japan)

机译：东海（日本海洋）经络翻转流通的二等变化

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摘要

Meridional overturning circulation (MOC) is vital to distributing heat, freshwater, and dissolved matter in semienclosed deep marginal seas such as the East Sea (ES) (Sea of Japan). As our understanding of the ES MOC remains incomplete, we attempted to fill this research gap. We analyzed the ES MOC and its decadal change (1993-2012). employing Hybrid Coordinate Ocean Model (HYCOM) global reanalysis. We found that the ES MOC. consisting of two counterrotating overturning cells in the late 1990s. changed into a single full-depth cell in the 2000s and reverted to two cells in the 2010s. The decadal change relates to weakening of the southward western boundary current at the intermediate layer and northward eastern boundary currents at the deep abyssal layer. We propose that surface warming and salinification favored reduced intermediate water formation and enhanced bottom water formation in the northwestern ES in the 2000s and were, therefore, key to the decadal change. Conditions unfavorable to intermediate water formation and favorable to bottom water formation in the winters of the 2000s, compared with the late 1990s, enhanced northward (westward) Ekman transport in the southern (northeastern) ES. successive advection of surface warm, saline water into water formation areas, and air-sea heat and freshwater exchanges linked to the January Arctic Oscillation. Our results indicated that the ES MOC is sensitive to both external atmospheric forcing and internal ES processes, which have implications for significant changes in the response of other marginal seas and global oceans to future climate variability.
机译：子午线推翻循环（MOC）对于分发热，淡水和溶解物在半深杂化的深处边缘海域（如日本海洋）中的溶解物至关重要。随着我们对ES MOC的理解仍然不完整，我们试图填补这一研究差距。我们分析了ES MOC及其二等变革（1993-2012）。雇用混合坐标海洋模型（Hycom）全球再分析。我们发现ES MOC。由20世纪90年代后期的两种反向翻转细胞组成。在2000年代中的一个全深度单元格变为2010年代的两个单元格。二等变化涉及深层深层层层中中间层和向北界线的南方西部边界电流的弱化。我们提出了地表变暖和盐化有利于2000年代西北部的中间水形成和增强的底水形成，因此是截止的转变。与20世纪90年代后期的冬季冬季水土形成和底部水形成不利的条件，与20世纪90年代末，增强了南部（东北部）EKMAN运输的北方（向西）。连续平流表面温暖，盐水进入水形成区域，以及与1月北极振荡相关的空中海水和淡水交换。我们的结果表明，ES MOC对外部大气强制和内部ES流程敏感，这对其他边缘海洋和全球海洋对未来气候变化的响应的重大变化有影响。

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  • 来源
    《Journal of Physical Oceanography》 |2020年第6期|1773-1791|共19页
  • 作者

    MyeongHee Han; Yang-Ki Cho; Hyoun-Woo Kang; SungHyun Nam;

  • 作者单位

    School of Earth and Environmental Sciences and Research Institute of Oceanography Seoul National University Seoul South Korea;

    School of Earth and Environmental Sciences and Research Institute of Oceanography Seoul National University Seoul South Korea;

    Ocean Circulation and Climate Research Center Korea Institute of Ocean Science and Technology Busan South Korea;

    School of Earth and Environmental Sciences and Research Institute of Oceanography Seoul National University Seoul South Korea;

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