Variabilities of the sea level anomalies in the upstream areas of the Kuroshio Current

1st International Conference on Maritime Sciences and Advanced Technology "Ocean Science and Technology Toward a Global Maritime Axis"

Wijaya, Y.J.^1,2 ; Sugitani, S.^3 ; Sugianto, D.N.^4,5 ; Wijayanti, D.P.^2 ; Hisaki, Y.^1

Faculty of Science, University of the Ryukyus, Nishihara

903-0213, Japan^1

Faculty of Fisheries and Marine Science, Diponegoro University, Semarang

50275, Indonesia^2

National Institute of Information and Communications Technology, 4484 Onna, Kunigami

904-0411, Japan^3

Oceanography Department, Diponegoro University, Semarang

50275, Indonesia^4

Centre for Disaster Mitigation and Rehabilitation Studies, Diponegoro University, Semarang

50275, Indonesia^5

关键词: Eddy activity;    High frequency radar;    Kuroshio current;    Marine environment monitoring;    Positive correlations;    Satellite altimetry;    Sea level anomaly;    Warm eddy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/162/1/012045/pdf
DOI  :  10.1088/1755-1315/162/1/012045

来源: IOP

【 摘 要 】

The relationship between The Kuroshio velocities and Sea Level Anomalies (SLA) in the upstream areas (between Taiwan and Yonaguni Island) is investigated based on satellite altimetry observation. Mean of the SLA data from 2005-2008 show that in the northeast of Taiwan tends to form strong eddy activity. Furthermore, the type of eddy that forms in the upstream areas is difference every season, cold (warm) eddy more exists in summer (winter). The speed of the Kuroshio in the upstream areas is determined by combination of High-Frequency (HF) radar and Copernicus Marine Environment Monitoring Service (CMEMS) data. These two are exhibited that Kuroshio speed become faster (slower) in summer (winter). High positive correlation of the Kuroshio speed and SLA are found in between Yonaguni and Iriomote Island. When the Kuroshio speed in the middle of HF radar areas (123.375° N) became faster, it coincided with transition of warm eddy to cold eddy in the northeast of Taiwan and vice versa.