Principal-component estimates of the Kuroshio Current axis and path based on the mathematical verification between satellite altimeter and drifting buoy data

IOCAS-IR

	Principal-component estimates of the Kuroshio Current axis and path based on the mathematical verification between satellite altimeter and drifting buoy data
	Zhanpeng Zhuang ; Zhenli Hui; Guangbing Yang ; Xinhua Zhao ; Yeli Yuan
发表期刊	Acta Oceanologica Sinica
ISSN	0253-505X
	2020-01-15
出版年	2020
卷号	v.39 期号:01 页码:18-28
文献类型	CNKI期刊论文
摘要	We used satellite altimetry data to investigate the Kuroshio Current because of the higher resolution and wider range of observations. In previous studies, satellite absolute geostrophic velocities were used to study the spatiotemporal variability of the sea surface velocity field along the current, and extraction methods were employed to detect the Kuroshio axes and paths. However, sea surface absolute geostrophic velocity estimated from absolute dynamic topography should be regarded as the geostrophic component of the actual surface velocity, which cannot represent a sea surface current accurately. In this study, mathematical verification between the climatic absolute geostrophic and bin-averaged drifting buoy velocity was established and then adopted to correct the satellite absolute geostrophic velocities. There were some differences in the characteristics between satellite geostrophic and drifting buoy velocities. As a result, the corrected satellite absolute geostrophic velocities were used to detect the Kuroshio axis and path based on a principal-component detection scheme. The results showed that the detection of the Kuroshio axes and paths from corrected absolute geostrophic velocities performed better than those from satellite absolute geostrophic velocities and surface current estimations. The corrected satellite absolute geostrophic velocity may therefore contribute to more precise day-to-day detection of the Kuroshio Current axis and path.
关键词	Kuroshio axis detection Kuroshio path detection mathematical verification satellite absolute geostrophic velocity principal-component detection
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A010;
CNKI专题名称	海洋学;
分类号	P731.27
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	The National Science and Technology Major Project of the Ministry of Science and Technology of China under contract No.2018YFF01014100 ; the National Programme on Global Change and Air-Sea Interaction under contract No.GASI-IPOVAI-01-05 ; the NSFC-Shandong Joint Fund for Marine Science Research Centers under contract No.U1606405
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/188338
专题	中国科学院海洋研究所
作者单位	1.TheFirstInstituteofOceanography,MinistryofNaturalResources 2.LaboratoryforRegionalOceanographyandNumericalModeling,QingdaoNationalLaboratoryforMarineScienceandTechnology 3.InstituteofOceanology,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Zhanpeng Zhuang,Zhenli Hui,Guangbing Yang,et al. Principal-component estimates of the Kuroshio Current axis and path based on the mathematical verification between satellite altimeter and drifting buoy data. 2020.