南海声速跃层季节变化特征分析  

Seasonal variabilities of the sound velocity spring layer in the South China Sea

作　　者：亓晨[1,2] 刘宇迪[1,3] 刘建强[1] 郎丰旺[1] 

机构地区：[1]解放军理工大学气象学院 [2]解放军96117部队213分队 [3]中国科学院海洋研究所

出　　处：《海洋预报》2011年第3期46-54,共9页Marine Forecasts

基　　金：国家自然科学基金项目(40505024)

摘　　要：利用SODA月平均温、盐资料研究南海声速跃层时空分布特征。采用垂直梯度法,分析了主跃层的区域性分布及季节性变化,得出了声速跃层垂直结构参数的统计特征值。结果表明南海海区的季风和环流结构对主跃层的影响很大。夏季声速跃层分布最广,深度最浅,厚度最厚,强度最大。冬季跃层范围最小,深度最深,厚度最薄,强度最小。春秋季跃层特征介于冬夏之间,但春季南海声速跃层深度较秋季浅,厚度较秋季薄,范围较秋季小。This study focuses on the spatial and temporal variability of the sound velocity spring layer in the South China Sea（SCS） based on the monthly temperature and salinity data derived from the Simple Ocean Data Assimilation（SODA） data.The regional distribution and seasonal variability of the main spring layer are investi-gated using the vertical gradient method and their statistical eigenvalues are obtained.The results indicate that the main spring layers are significantly affected by the monsoon wind and the structure of water currents.The spring layer is vastest,shallowest,thickest and strongest in summer,but smallest,deepest,thinnest and weakest in win-ter.The characteristics of the spring layer in spring and autumn are in between summer and winter,but the spring layer in autumn is vaster,deeper and thicker than that in spring.

关 键 词：南海 声速跃层 季节变化 

分 类 号：P731[天文地球—海洋科学]