印度洋北部海域垂直剖面温度结构的参数模型

Parametric model of seawater temperature profile in the Northern Indian Ocean

针对印度洋北部海域海水温度结构特征,利用2010年ARGO剖面温度数据进行了海水温度垂直剖面结构特征分析及参数模型研究。印度洋北部海域海水呈现稳定的三层结构,即混合层、温跃层和深层,本文将该海域垂直剖面温度结构表达为5个参数组成的参数模型,5个参数分别为海表面温度、混合层深度、温跃层深度、跃层底部温度和温跃层强度。为了检验参数化模型的反演效果,我们以2010年为例,进行了印度洋北部海域的垂直剖面温度反演,并将反演结果与ARGO实测数据进行对比分析,剖面温度的总体均方根误差为0.510 8℃。

In this paper,according to the structural features of seawater temperature in the northern Indian Ocean,we analyzed seawater temperature vertical profile structural characteristics and then developed a parametric model using the temperature data of the 2010 ARGO profiles.It is a steady three-tier structure in the northern Indian Ocean,the mixed layer,thermocline and deep layer.In this paper,based on those layered structure of temperature fields,the parametric model of seawater vertical profile include five parameters：sea surface temperature,mixed layer depth,thermocline bottom depth,thermocline bottom temperature,thermocline temperature gradient.In order to verify the parametric model inversion accuracy,we took 2010 as an example,the inversion results were compared with the corresponding observed temperature profiles of the northern Indian Ocean,the root mean square error is 0.510 8 ℃.