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热带海洋学报 >

2015 , Vol. 34 >Issue 3: 13 - 22

DOI: https://doi.org/10.11978/j.issn.1009-5470.2015.03.002

海洋水文学

海洋近表层流和上层温盐对1215号台风“天秤”的响应

  • 杨龙奇
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  • 福州市海洋与渔业技术中心, 福建 福州, 350026
杨龙奇(1987~), 男, 福建省惠安县人, 助理工程师, 硕士, 主要从事物理海洋学研究。E-mail: yanglq0822@126.com

收稿日期: 2014-07-29

  修回日期: 2014-12-02

  网络出版日期: 2015-06-08

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Responses to 2012 Typhoon Tembin in terms of near-surface flow and thermohaline

  • YANG Long-qi
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  • Fuzhou Ocean and Fisheries Technology Center, Fuzhou, 350026, China

Received date: 2014-07-29

  Revised date: 2014-12-02

  Online published: 2015-06-08

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摘要

本研究采用漂流浮标数据、多种卫星数据及全球高分辨率的温盐剖面数据, 探讨海洋近表层流和上层温盐对1215号台风“天秤”的响应。在距离强台风“天秤”中心的50km处测到了2.3m•s-1的近表层流速, 但在其他类似情况下测到的流速却不足1m•s-1, 表现出较大的差异。其原因为: 位于冷暖水团交汇锋面区的漂流浮标流向多变, 因而平均流速较慢。此外, 在强台风过境后1~2d过境轨迹的两边和强台风过境后5~6d过境轨迹右边的海洋上层均发生了强烈的垂直混合, 使得温度降低, 盐度增加; 混合层以下均表现出明显的上升流特征, 说明台风的气旋式应力引起了海洋温跃层的强烈抬升, 对上层海洋起到“冷抽吸”的作用。

关键词： 台风; 近表层流速; 垂直混合; 上升流

本文引用格式

杨龙奇 . 海洋近表层流和上层温盐对1215号台风“天秤”的响应[J]. 热带海洋学报, 2015 , 34(3) : 13 -22 . DOI: 10.11978/j.issn.1009-5470.2015.03.002

Abstract

In this study, we explore the upper-ocean responses to Typhoon Tembin in 2012 with three drifting buoys’ data, high-resolution global temperature and salinity profile data, and satellite data. Results show that in the 50 km from the typhoon’s center, there was a near-surface flow velocity of 2.3 m•s-1. In other similar typhoon cases, however, flow velocity was often less than 1 m•s-1, much weaker than Typhoon Tembin. The reason is the drifting buoy in the frontal area of the intersection of cold and warm water masses encountered large variability of flow. So, the average flow velocity was small in other similar typhoon cases. There was strong vertical mixing, making temperature decreased and salinity increased at both left track and right track 1~2 days after the super strong typhoon passed by, and at the right track 5~6 days after the strong typhoon passed by. There was obvious upwelling below the mixed layer.

Key words： typhoon; near-surface flow; vertical mixing; upwelling

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