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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Development of subsurface warm water in the East China Sea in fall
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Development of subsurface warm water in the East China Sea in fall

机译：秋季东海地下热水的开发

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摘要

The development of subsurface warm water (SSWW) in the East China Sea (ECS) in fall is analyzed using two observational data sets and the results of a one-dimensional numerical model. During October, the SSWW is developed in the ECS and remains till the end of November. The analysis shows that it is the Changjiang River (also known as Yangtze River) diluted water (CRDW) that maintains the vertical structure of water column with a subsurface maximum temperature in this region. In fall, the diluted water flows southward in the ECS, leading to a lower salinity layer in the upper ocean. The existence of this lower salinity layer limits the depth of the vertical mixing induced by the loss of heat on the sea surface in fall, and therefore, maintains the higher temperature of the subsurface water. In winter, when the density's vertical gradient of the low salinity layer cannot balance the negative surface buoyancy flux, the SSWW vanishes. However, this situation does not occur outside the region where the CRDW extends, because the stratification becomes unstable while the sea surface loses heat and the convective overturn will readjust the whole water column. Numerical results of a one-dimensional model reveal that the SSWW appears if the impact of the CRDW is included in the model; otherwise, the SSWW does not occur.
机译：利用两个观测数据集和一维数值模型的结果，分析了东海（ECS）在秋季的地下热水（SSWW）的发展。在10月期间，在ECS中开发了SSWW，并且一直持续到11月底。分析表明，正是长江（又称长江）稀释水（CRDW）维持了该区域水柱的垂直结构，并具有地下最高温度。秋季，稀释水在ECS中向南流动，导致上层海洋盐度较低。这种较低盐度层的存在限制了秋季坠入海面的热量损失所引起的垂直混合的深度，因此维持了地下水的较高温度。在冬季，当低盐度层的密度的垂直梯度无法平衡负表面浮力通量时，SSWW消失了。但是，这种情况不会在CRDW延伸的区域之外发生，因为分层会变得不稳定，而海面会失去热量，对流翻转会重新调整整个水柱。一维模型的数值结果表明，如果将CRDW的影响包括在模型中，则会出现SSWW。否则，不会发生SSWW。

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