Application and evaluation of layering shear method in LADCP data processing  

作　　者：Zijian Cui Chujin Liang Binbin Guo Feilong Lin Yong Mu 

机构地区：[1]Ocean College,Zhejiang University,Zhoushan 316021,China [2]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China [3]School of Marine Sciences,Nanjing University of Information Science&Technology,Nanjing 210044,China [4]National Engineering Research Center of Gas Hydrate Exploration and Development,Guangzhou Marine Geological Survey,Guangzhou 510760,China

出　　处：《Acta Oceanologica Sinica》2023年第12期9-21,共13页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract No.42206033;the Marine Geological Survey Program of China Geological Survey under contract No.DD20221706;the Research Foundation of National Engineering Research Center for Gas Hydrate Exploration and Development,Innovation Team Project,under contract No.2022GMGSCXYF41003;the Scientific Research Fund of the Second Institute of Oceanography,Ministry of Natural Resources,under contract No.JG2006.

摘　　要：The current velocity observation of LADCP(Lowered Acoustic Doppler Current Profiler)has the advantages of a large vertical range of observation and high operability compared with traditional current measurement methods,and is being widely used in the field of ocean observation.Shear and inverse methods are now commonly used by the international marine community to process LADCP data and calculate ocean current profiles.The two methods have their advantages and shortcomings.The shear method calculates the value of current shear more accurately,while the accuracy in an absolute value of the current is lower.The inverse method calculates the absolute value of the current velocity more accurately,but the current shear is less accurate.Based on the shear method,this paper proposes a layering shear method to calculate the current velocity profile by“layering averaging”,and proposes corresponding current calculation methods according to the different types of problems in several field observation data from the western Pacific,forming an independent LADCP data processing system.The comparison results have shown that the layering shear method can achieve the same effect as the inverse method in the calculation of the absolute value of current velocity,while retaining the advantages of the shear method in the calculation of a value of the current shear.

关 键 词：LADCP data processing layering shear method Western Pacific 

分 类 号：P714.1[天文地球—海洋科学]