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北黄海冷水团季节变化特征分析
引用本文:姚志刚,鲍献文,李娜,李希彬,万凯,宋军.北黄海冷水团季节变化特征分析[J].中国海洋大学学报(自然科学版),2012,42(6):9-15.
作者姓名:姚志刚  鲍献文  李娜  李希彬  万凯  宋军
作者单位:1. 中国海洋大学海洋环境学院,山东青岛266100;中国海洋大学物理海洋重点实验室,山东青岛266100
2. 中国海洋大学海洋环境学院,山东青岛,266100
3. 国家海洋局天津海洋环境监测中心站,天津,300457
4. 国家海洋信息中心,天津,300171
基金项目:我国近海海洋综合调查与评价专项
摘    要:利用2006—2007年春、夏、秋、冬4个航次的CTD数据,对北黄海冷水团的季节变化及其消长过程进行了分析.结果显示:春季,冷水团特征开始出现,6℃冷水占据了调查区域的1/3,冷水团中心的盐度值大于32 psu.成山头以东的高盐水舌主轴从冬季的124°E西移至123.3°E处;夏季,北黄海冷水团特征最为明显,核心温度约6℃,盐度高于32 psu,盘踞在50 m等深线以深的深槽中,温、盐呈现明显的双峰结构.与前人的结果相比,本文低温中心的位置偏东;秋季,北黄海冷水团强度减弱,但仍存在2个低温中心,并且高盐中心位于38.5°N,122.5°E附近;在垂直方向上,冷水团与上层水之间以温跃层为分界:温跃层春季时形成,位于20~30m;夏季达到最强,跃层在10~20m;秋季减弱,跃层深度降至30~40m;至冬季温跃层完全消失.

关 键 词:北黄海冷水团  季节变化  温盐分布  黄海暖流

Seasonal Evolution of the Northern Yellow Sea Cold Water Mass
YAO Zhi-Gang , BAO Xian-Wen , LI Na , LI Xi-Bin , WAN Kai , SONG Jun.Seasonal Evolution of the Northern Yellow Sea Cold Water Mass[J].Periodical of Ocean University of China,2012,42(6):9-15.
Authors:YAO Zhi-Gang  BAO Xian-Wen  LI Na  LI Xi-Bin  WAN Kai  SONG Jun
Institution:1.College of Physical and Environmental Oceanography,Ocean University of China,Qingdao 266100,China;2.The Key Laboratory of Physical Oceanography,Ocean University of China,Qingdao 266100,China;3.Tianjin Marine Environmental Monitoring Central Station,State Oceanic Association,Tianjin 300457,China;4.National Marine Data and Information Service,State Oceanic Association,Tianjin 300171,China)
Abstract:Based on in-situ CTD observations from "908" Project during 2006—2007,the formation and evolution of North Yellow Sea Cold Water Mass(NYSCWM) is analyzed: The NYSCWM,which appears in spring,characterizes with a 6 ℃ cold water mass covering more than 1/3 of survey region and core salinity exceeding 32 psu.The axis of 32.5 saltier tongue is found to move toward west from 124°E in winter to 123.3°E in spring off the east of Chengshantou.;In summer NYSCWM occupies the central trough of 50 m and the strength reaches its peak with a core temperature less than 6 ℃ and salinity higher than 32 psu,A two-core pattern can be identified both in temperature and salinity fields.Comparing to previous results,a eastward drift exists for the center of cold water;The two-core feature of NYSCWM still remains in autumn for temperature,but with its strength being greatly weakened.The location of higher salinity lies off 38.5°N,122.5°E;The most significant feature in vertical is a thermocline,which separate the NYSCWM from its upper water.The thermocline is found to appear in spring with a depth of 20~30 m and moves upward to 10~20 m in summer,reaching its peak in strength.In autumn it turns to a lower depth of 30~40 m and finally disappears in witner.
Keywords:the North Yellow Sea cold water mass  seasonal evolution  temperature and salinity distribution  the Yellow Sea warm current
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