A combinatorial algorithm for identification of the thermocline boundaries
The applicability of several frequently-used methods for identifying the boundary of thermocline is limited.To improve the applicability of the method for identifying the boundary of thermocline,a kind of combinatorial algorithm for identifying the boundary of thermocline is proposed in this paper.This algorithm is based on the vertical gradient method and a kind of improved quasi-step function approximation method.To demonstrate the applicability and objectivity of the processing results,the dataset of BOA_Argo is used in this experiment.The temperature profiles of a specific Pacific Ocean area(0°～30°N,135°E～165°E)are processed with this algorithm.The result reflects that this combinatorial algorithm can fit temperature profiles of low-attitude sea area with high quality and the root mean squared error of fitted temperatures is generally lower than 1.3 ℃.The boundaries of thermoclines acquired by this algorithm have more continuity and lower jitter in the direction of latitude.However,as for the temperature profiles of the middle and high-latitude sea area,the algorithm generally performs poorly.So,it is proper to take the boundaries of thermocline directly only by vertical method in the sea area of middle and high latitude.
ThermoclineBOA_ArgoQuasi-step function approximation methodVertical gradient method
万方数据
维普
