| 摘要: |
| 近年来,关于台湾海峡西部海域的水文状况,已有一些研究(肖晖等,1988；曾刚等，1988),但对海峡中部和东部海域的研究则较少,特别是对该海域海水温、盐度的垂直分布类型和细结构的调查研究至今尚未见报道。本文拟对台湾海峡中、北部海域夏季温、盐度的垂直分布类型和细结构进行分析研究。这将有助于进一步了解台湾海峡海域的水文状况、水团结构和海水的垂直混合过程及其机制,对该海域的资源(特别是渔业资源)开发也有现实意义。
本文所用资料是中国科学院海洋研究所和福建海洋研究所1987年7月11-20日和8月25-29日在台湾海峡中、北部海域进行的两次“上升流”专题调查中搜集的,调査站位如图1所示。这些资料包括南森站资料和CTD资料两类。前者系利用南森采水器和颤倒温度表获得,观测层次采用浅海标准层次(即0,5,10,15,20,25,30,50,75m,…底层)。后者系用美国 Interocean 公司513D型多要素探测仪(CTD)获取,为连续取样,该探测仪深度、温度和盐度的观测误差分别为±0.03m,±0.02℃和±0.05。
两次调查期间的天气状况基本相似。第一航次期间天气形势较稳定,多为晴和少云。第二航次期间天气形势基本与第一航次相似；但8月30日因受合风影响,天气状况趋于恶劣,F断面未能进行观测。在两次调査期间,台湾海峡中、北部海域的风向较稳定,多为南-西南风,仅个别测站出现东南风;风速変化也较小,一般都在2-5m/s之间,最大风速为9m/s。调査期间气温较高,大都在26.8-28.8℃间2最高为29.4℃。 |
| 关键词: 台湾海峡中、北部海域，夏季温、盐度，垂直分布类型，细结构 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第1603号 |
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| THE VERTICAL DISTRIBUTION PATTERNS AND FINE STRUCTURES OF TEMPERATURE AND SALINITY IN THE MIDDLE AND NORTHERN TAIWAN STRAIT IN SUMMER |
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Zhang Qilong, Weng Xuechuan, Li Pengcheng
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| In this paper, the vertical distribution patterns and fine structures of temperature and salinity in the middle and northern Taiwan Strait is studied based on data obtained with Nansen bottle and CTD system in two special cruises for"upwelling in July and August, 1987. The results show that the vertical distribution patterns of temperature and salinity are simple in this area in summer. For temperature, negative gradient is main in the area; the vertical homogeneous type and intermediate warm water type can only be found at a few stations. For salinity, only two types of vertical distributions, the homogeneous type and the positive gradient type, are found,and the positive gradient type covers almost the whole studied area in July and the vertical homogeneous type is dominant in August.
Multi-ladder structure and fine structure phenomena also exist in the vertical distribution of temperature and salinity in the region, and the fine structure of temperature is more developed than that of salinity. For temperature, the appearance frequency of negative gradient layer is very higher than that of positive gradient layer. For salinity, the appearance frequency of negative gradient layer is lower than that of positive gradient layer. Their gradient values,however, are all small, commonly 0.05-0 10℃/m for temperature and 0.05-0.10/m for salinity. Their appearance frequency lowers rapidly with the increase of the gradient value. The thickness of positive (or negative)gradient layer of temperature and salinity is small in summer. Almost 75% of the gradient layers are 0.1-0.6 m thick. |
| Key words: VERTICAL DISTRIBUTION PATTERNS,FINE STRUCTURES ,TEMPERATURE AND SALINITY, MIDDLE AND NORTHERN TAIWAN STRAIT |
