海洋学研究 ›› 2015, Vol. 33 ›› Issue (4): 53-60.DOI: 10.3969/j.issn.1001-909X.2015.04.006

• 研究论文 • 上一篇    下一篇

第二岛链以东附近海域冬季水文要素特征分析

张胜军1, 高飞2   

  1. 1.东海舰队 海洋水文气象中心,浙江 宁波 315122;
    2.海军海洋测绘研究所,天津 300061
  • 收稿日期:2014-12-04 修回日期:2015-11-17 出版日期:2015-12-15 发布日期:2022-11-28
  • 作者简介:张胜军(1980-),男,浙江台州市人,工程师,主要从事海洋水文方面的研究。E-mail:shengjun135@163.com

Analysis on the characteristics of hydrological elements in the easterly ocean nearby the second island chain in winter

ZHANG Sheng-jun1, GAO Fei2   

  1. 1. Hydrological and Meteorological Center of East Sea Fleet, Ningbo 315122, China;
    2. Naval Institute of Hydrographic Surveying and Charting, Tianjin 300061, China
  • Received:2014-12-04 Revised:2015-11-17 Online:2015-12-15 Published:2022-11-28

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摘要： 利用西太平洋冬季海洋综合调查获取的数据资料,分析了第二岛链以东附近海域冬季温度、盐度、声速和密度的分布特征和变化规律。使用Ocean Data View海洋数据软件对资料进行网格化处理,同时采用Wilson方法和垂直梯度法计算声速和声速梯度。分析数据结果表明:第二岛链以东附近海域冬季温度随深度增加而减小,且750 m以浅变化幅度较大;而盐度和声速的垂直结构特征均表现为从表层向下先减小后增大,但各自存在不同的临界深度。海区存在温度和声速双跃层结构,上跃层强度大,厚度小;下跃层强度较小,厚度较大。

关键词: 第二岛链, 冬季, 水文要素, 分布特征

Abstract: Based on the conductivity-temperature-depth (CTD) data from the compositive survey in the westen Pacific, the distribution characteristics and change regularity of the temperature, salinity, speed of sound and density in the easterly ocean nearby the second island chain in winter have been analysed. Data were processed with average gridding methods by using a software named Ocean Data View (ODV), and the speed of sound and sound velocity gradient were obtained with the speed calculation method of Wilson and vertical gradient methods. Comprehensive analytic results indicate: the temperature are decrease as the depth increase, and the rate of change is obvious above 750 meters; however, the characteristics of vertical structure of salinity and speed of sound values are decrease first, and then increase downward from surface layer, which have different critical depth. There are two thermoclines in the sea area, the upper one is stronger and thinner than the under one.

Key words: the second island chain, winter, hydrological elements, distribution characteristics

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