Performance analysis of global HYCOM flow field using Argo profiles  

作　　者：Yixuan Zhang Songshan Yue Kai Xu Zhuo Zhang Liangcheng Zhou Yihan Zhang Guonian Lü 

机构地区：[1]School of Geography,Key Laboratory of Virtual Geographic Environment(Ministry of Education of PRC),Nanjing Normal University,Nanjing,People’s Republic of China [2]State Key Laboratory Cultivation Base of Geographical Environment Evolution(Jiangsu Province),Nanjing,People’s Republic of China [3]Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing,People’s Republic of China

出　　处：《International Journal of Digital Earth》2023年第1期3536-3559,共24页国际数字地球学报（英文）

基　　金：supported by National Natural Science Foundation of China[grant nos:41930648,42171406 and 42171465];National Key Research and Development Program of China[grant no:2021YFB3900901].

摘　　要：Flow field data generated by ocean models are important for simulating ocean currents and circulation patterns,which are essential components in digital Earth construction.To evaluate the accuracy of model-simulatedflow felds,Array for Real-timeGeostrophic Oceanography(Argo)float observations can be considered benchmarks.In this study,a novel method for comparing Argo profiles with 3-dimensional trajectories obtained by simulating Argo floats in Hybrid Coordinate Ocean Model(HYCOM)-provided flow fields was proposed.Surface and subsurface trajectories were calculated,and their spatial matching characteristics were analyzed.The results demonstrated that(1)the HYCOM surface and subsurface flow felds generally conform to the basic characteristics and trends of ocean currents;(2)the HYCOM sea surface current field error pattern exhibits a symmetrical distribution centered on the equator in the Northern and Southern Hemispheres and increases with increasing latitude;and(3)the HYCOM subsurface flow field exhibits regional differences,with the largest differences in the Gulf Stream,North Atlantic Warm Current,and Westerly Wind Drift region.Through analysis of the disparities between HYCOM and Argo data,the effectiveness of using model simulation data can be enhanced,and the accuracy and dependability of ocean models can be improved.

关 键 词：HYCoOM Argo floats ocean flow field trajectory matching ocean modeling 

分 类 号：P73[天文地球—海洋科学]