南海温跃层深度计算方法的比较

发布时间：2018-03-12 18:10

本文选题：温跃层　切入点：S-T法　出处：《海洋通报》2016年01期 　论文类型：期刊论文

【摘要】：基于1986-2008年的中国近海及邻近海域再分析产品(CORA)气候平均海温资料,分别运用S-T法、垂向梯度法和最大曲率点3种温跃层定义计算了南海温跃层上界深度,揭示了南海温跃层季节变化特征。对3种不同定义确定的温跃层上界深度进行比较发现:采用不同定义计算南海温跃层上界深度存在差异,S-T法确定的温跃层上界深度最浅,垂向梯度法其次,最大曲率点法最深;在深水区(水深200 m)运用S-T法计算的温跃层上界深度与垂向梯度法的结果比较一致,都与实际温跃层深度符合较好;在浅水区(水深200 m),垂向梯度法和最大曲率点法可以准确判定无跃区,但对于温跃层深度计算,3种定义误差均较大。
[Abstract]:Based on the climatic mean SST data of China offshore and its adjacent waters from 1986 to 2008, the upper boundary depth of the thermocline in the South China Sea is calculated by using the S-T method, the vertical gradient method and the maximum curvature point, respectively. The characteristics of seasonal variation of thermocline in the South China Sea are revealed. The results show that the depth of thermocline upper boundary determined by S-T method is the shallowest by using different definitions to calculate the depth of thermocline upper boundary in the South China Sea. The vertical gradient method is the second, the maximum curvature point method is the deepest, the upper boundary depth of thermocline calculated by S-T method in deep water area (water depth 200 m) is consistent with the result of vertical gradient method, which is in good agreement with the actual thermocline depth. The vertical gradient method and the maximum curvature point method can accurately determine the no-jump zone in shallow water (water depth 200mg), but the three definition errors for thermocline depth calculation are all large.
【作者单位】：国家海洋技术中心;国家海洋信息中心;国家海洋局海洋环境信息保障技术重点实验室;
【基金】：国家海洋局海洋环境信息保障技术重点实验室开放课题(2014-2015)
【分类号】：P731.11

【相似文献】