舟山以东浅水海域夏季水团及温盐日变化特征

发布时间：2018-07-06 20:21

本文选题：舟山以东浅水海域 + 水团划分　；参考：《解放军理工大学学报(自然科学版)》2016年03期

【摘要】：为了探索舟山以东浅水海域夏季水团分布及温、盐日变化规律,基于舟山以东浅水区域时间分辨率为1h的温盐深(CTD)站点数据,首先对数据剖面取平均以研究其温、盐场结构特征,然后利用Fuzzy聚类法对该区域进行水团划分,最后根据水团划分结果分区域统计分析跃层特征,并计算温、盐日变幅极差值以研究其日变化空间的分布特征。结果表明:研究区域可分为沿岸流水团、近岸混合水团、黑潮水团、东海中-深层水团、东海中-深层混合水团;受黑潮支流与沿岸流混合下沉的影响,调查海域中部中-深层水体相对高温、低盐;沿岸流区与黑潮水区10~20m深度层的温、盐日变幅较大,与跃层深度对应较好,表层、次表层的较小,底层的近似为0;近岸混合水团跃层上界深度最大、平均强度最小,该区域表层、底层日变幅相对较大。
[Abstract]:In order to explore the distribution of water mass, temperature and salt diurnal variation in shallow waters east of Zhoushan in summer, based on the temporal resolution of 1 h temperature and salt depth (CTD) data in shallow water area east of Zhoushan, the average temperature of the data profile was taken to study its temperature. The structure characteristics of salt field are analyzed, and then the water mass is divided by fuzzy clustering method. Finally, according to the result of water mass division, the characteristics of cline are statistically analyzed, and the diurnal variation range of temperature and salt is calculated to study the distribution characteristics of diurnal variation space. The results show that the study area can be divided into coastal water mass, inshore mixed water mass, Kuroshio water mass and middle to deep mixed water mass in the East China Sea, which is affected by the mixed subsidence of Kuroshio tributaries and coastal currents. The relative high temperature and low salt in the middle and deep water bodies in the middle of the sea area, the temperature and salt diurnal variation of the 10 ~ 20m depth layer in the coastal current and Kuroshio water area are larger, corresponding to the depth of the cline layer is better, the surface layer and the subsurface layer are smaller, The bottom layer is approximately 0, the upper boundary depth of the coastal mixed water mass is the largest and the average strength is the smallest, and the daily variation amplitude of the bottom layer is relatively large in this area.
【作者单位】：海军海洋测绘研究所;解放军理工大学气象海洋学院;
【基金】：国家自然科学基金资助项目(41406004) 国家海洋局海洋公益性行业科研专项经费资助项目(2012050007-7)
【分类号】：P731

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