| 摘要: |
| 利用2018年7月在大亚湾及其邻近海域大潮期间定点准同步连续观测的CTD资料，分析了调查期间研究海域温度和盐度的分布及其日变化特征，并探讨其可能成因。结果表明：大亚湾海域表层温度分布由湾顶向湾外呈现“内高外低”的态势，盐度分布由湾内向湾外逐渐递增，10 m层也大体呈现湾内高温低盐、湾外低温高盐的特点。湾内垂向混合较为均匀，而湾外由于上、下层两种性质不同水体的叠置，存在较强的温度和盐度跃层。温度、盐度日变化因地而异，且差异明显，其变化主要受到太阳短波辐射、温排水、潮流等因素的影响。 |
| 关键词: 海洋水文学 温度 盐度 日变化 大亚湾 |
| DOI：10.3969/J.ISSN.2095-4972.2021.02.011 |
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| 基金项目:国家重点研发计划资助项目（2016YFC1401003，2016YFC1402607）;惠州市海洋渔业资源环境调查资助项目（F2017-01-1）；自然资源部第三海洋研究所基本科研业务费专项资金资助项目（海三科2018001，海三科2018030）；全球变化与海气相互作用专项资助项目（GASI-IPOVAI-02）；国家自然科学基金青年资助项目（41906013） |
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| Distribution characteristics of temperature and salinity in Daya Bay and its adjacent waters in summer |
| LI Yu-hui,QIU Yun,YANG Long-qi,HU Jian-yu |
| (Third Institute of Oceanography, MNR, Xiamen 361005, China;Third Institute of Oceanography, MNR, Xiamen 361005, China;Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China;State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China;State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China) |
| Abstract: |
| Based on a series of CTD data observed in Daya Bay and its adjacent waters during spring tide in July 2018, the distribution of temperature and salinity and their diurnal variation were characterized, and their possible causes were discussed. The results showed that the surface temperature distribution presented a trend of “high inside and low outside” from the top to the outer of Daya Bay, and the salinity distribution gradually increased from the inside to the outside. The 10 m layer also showed the characteristics of high temperature and low salinity in the inner bay and low temperature and high salinity in the outer bay. Vertical mixing in the bay is more uniform. Due to the overlap of the upper and lower water bodies, there is a strong thermocline and halocline outside the bay. The diurnal variation of temperature and salinity varied from place to place, and the difference is significant. The change is mainly due to the influences of shortwave radiation, warm drainage and tidal current. |
| Key words: marine hydrology temperature salinity diurnal variation Daya Bay |
