文献类型：期刊文献

中文题名：北部湾东北部水团和流场季节变化:2018—2019年观测数据分析

英文题名：Seasonal variation of water masses and current field in the northeastern Beibu Gulf based on observations in 2018-2019

作者：李明明[1,2,3];谭可易[1,2,3];黄家辉[1,2,3];谢玲玲[1,2,3]

机构：[1]广东海洋大学海洋与气象学院近海海洋变化与灾害预警实验室,广东湛江524088;[2]广东海洋大学广东省高等学校陆架及深远海气候、资源与环境重点实验室,广东湛江524088;[3]自然资源部空间海洋遥感与应用重点实验室,北京100081

年份：2022

卷号：40

期号：3

起止页码：73

中文期刊名：海洋学研究

外文期刊名：Journal of Marine Sciences

收录：CSTPCD、、北大核心、CSCD、北大核心2020、CSCD_E2021_2022

基金：广东省普通高校创新团队项目(2019KCXTF021);广东省冲一流专项资金项目(080503032101-231420003)。

语种：中文

中文关键词：北部湾;温、盐特性;季节变化;水团;流场;稳定性

外文关键词：Beibu Gulf;water properties;seasonal variation;water mass;current field;stability

中文摘要：本文基于2018年7月、10月和2019年2月在北部湾108°E以东、18°N以北区域的大面观测数据,分析了北部湾东北部的水团和流场特征。结果显示,研究区域水体特征存在明显季节变化:夏季水温北高南低,近岸低盐水占据30 m等深线以浅区域,海南岛西侧存在闭合冷水团;冬季水温北低南高,近岸低盐水退至湾顶10 m等深线以浅,湾内主要为混合水,海南岛西侧上层出现暖舌。海区流场基本为逆时针环流结构,流速大小存在季节变化,受风场影响明显;研究区与外海水交换不活跃,湾内水体不稳定性较强,冬季尤为明显,可能存在强垂向混合。

外文摘要：Hydrological observations were carried out in the northeastern of Beibu Gulf in July and October 2018,February 2019 to reveal its seasonal variations.Sectional measurements of temperature,salinity and current velocity were deployed to the north of 18°N and east of 108°E.The results show that there is obvious seasonal disparities on the character of water masses in this region:the sea water temperature in summer decreases from northern shallow water to southern deep region and the onshore brackish water dominates the area shallower than 30 m,and a occlusive cold water mass appears in deep layer to the west of Hainan Island;while in winter the water temperature increases from north to south,the brackish water shrinks to the northern coast shallower than 10 m,the area is occupied mainly by the mixed water,and a warm tongue appears in upper layer on the west of Hainan Island.The circulation in the research region is mainly counterclockwise in all three seasons,though the strength of current varies in different seasons,and is significantly influenced by wind.The water exchange between the northeastern gulf and outer ocean is not active,since the observed salinity is entirely less than 34.The water mass is generally shear instable,and static instability appears in winter.This suggests that the diapycnal mixing in this region might be strong.