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首页> 外文期刊>Journal of Physical Oceanography >Northward Intrusion of Antarctic Intermediate Water in the Western Pacific
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Northward Intrusion of Antarctic Intermediate Water in the Western Pacific

机译：西太平洋南极中间水向北侵入

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摘要

The northward intrusion of Antarctic Intermediate Water (AAIW) is examined using historical data combined with synoptic observations from a repeated hydrographic section in the western Pacific Ocean. The results of this analysis suggest that AAIW is traced as a salinity minimum to only about 15°N via the New Guinea Coastal Undercurrent and the Mindanao Undercurrent. There is no northward extension of AAIW farther to the north along the western boundary. Although relatively high oxygen water does exist in the Okinawa Trough, it is connected with high-oxygen water in the South China Sea (SCS) through the Luzon Strait but not from the south as an extension of AAIW. Local circulation seems to play an essential role in localizing the oxygen maximum in the SCS. Evidence exists to suggest that high-oxygen water enters the SCS as part of the Pacific deep water around the still depth (～2000 m) of the Luzon Strait; from there, part of it upwells and is entrained into shallower isopycnal surfaces by vertical mixing and eventually flows back to the Pacific through the Luzon Strait at depths of AAIW.
机译：结合历史数据和对来自西太平洋重复水文剖面的天气观测资料，对南极中间水（AAIW）向北侵入进行了检查。分析的结果表明，通过新几内亚沿海暗流和棉兰老岛暗流，AAIW的盐度最低值仅为15°N。沿西部边界向北延伸的AAIW没有向北延伸。尽管冲绳海槽中确实存在着较高的氧气水，但它是通过吕宋海峡与南中国海（SCS）中的高氧气水相连的，而不是从南部延伸的AAIW。局部循环似乎在SCS局部最大氧气含量方面起着至关重要的作用。有证据表明，高氧水作为吕宋海峡静止深度（〜2000 m）附近太平洋深水的一部分进入南海。从那里开始，它的一部分上升，并通过垂直混合被夹带到较浅的等渗表面中，并最终通过AAIW深度的吕宋海峡流回太平洋。

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