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引用本文:何源首,胡珀,侯一筠.台湾东北黑潮入侵东海陆架强度的变化规律:持续一年的ADCP现场流速观测.海洋与湖沼,2019,50(6):1201-1208.
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台湾东北黑潮入侵东海陆架强度的变化规律:持续一年的ADCP现场流速观测
何源首1,2, 胡珀1,3,4, 侯一筠1,2,3,4
1.中国科学院海洋研究所 海洋环流与波动重点实验室 青岛 266071;2.中国科学院大学 北京 100049;3.青岛海洋科学与技术试点国家实验室 海洋动力过程与气候功能实验室 青岛 266237;4.中国科学院海洋大科学中心 青岛 266071
摘要:
本文利用台湾东北陆坡附近海域持续一年的多普勒流速剖面仪(Acoustic Doppler Current Profilers,ADCP)定点深水测流数据提取了观测站点处黑潮跨陆坡入侵强度的时间序列,并与美国海军混合坐标海洋模式(Hybrid Coordinate Ocean Model,HYCOM)分析数据中提取的观测站点处以及台湾东北陆坡东西区段黑潮入侵强度的时间序列进行了对比研究。研究结果显示黑潮在观测站点处的跨陆坡入侵强度存在显著的季节和季节内变化特征,并且与台湾东北黑潮主轴位置的摆动有较好的对应关系,黑潮主轴东(西)移,则黑潮在台湾东北陆坡西段及观测站点处的入侵显著减弱(增强),而在台湾东北陆坡东段的入侵显著增强(减弱)。此外,观测站点处黑潮跨陆坡入侵强度的时间序列还显示出较强的10d和20d左右的短周期信号,其中10d的周期信号对应着东海黑潮斜压不稳定波动的特征周期,而20d的周期信号则体现了台湾东北附近海域局地涡旋的短期变化。
关键词:  台湾东北  黑潮入侵  ADCP(Acoustic Doppler Current Profilers,ADCP)观测  HYCOM(Hybrid Coordinate Ocean Model)
DOI:10.11693/hyhz20190600113
分类号:P731.26
基金项目:国家自然科学基金,41630967号,41476018号,41776020号;国家海洋局“全球变化与海气相互作用专项”,GASI-IPOVAI-01-06号;国家自然科学基金委员会-创新研究群体科学基金,414121005号;国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目,U1606402号。
VARIATION OF KUROSHIO INTRUSION INTENSITY OFF NORTHEASTERN TAIWAN BASED ON ONE-YEAR ADCP OBSERVATIONS
HE Yuan-Shou1,2, HU Po1,3,4, HOU Yi-Jun1,2,3,4
1.CAS Key Laboratory of Ocean Circulation and Waves, Institute of oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Laboratory for Ocean and Climate Dynamics, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
Abstract:
An one-year (2017-5-23-2018-5-19) observation was performed with an ADCP (acoustical Doppler current profiler) mounted to a moored submerged buoys off northeastern Taiwan and Hybrid Coordinate Ocean Model (HYCOM) analysis data as well as satellite altimeter data were analyzed to reveal the variation in intensity of the Kuroshio cross-shelf intrusion off northeastern Taiwan. The intrusion intensity on-site showed significant inter-and intra-seasonal variations within the influence of the Kuroshio axis movement. The cross-shelf intrusion intensity on-site and through the western (eastern) slope off the northeastern Taiwan was weakened (strengthened) while the Kuroshio axis moved seaward (shoreward). In addition, the intrusion intensity showed a 10-day and 20-day short signals. The 10-day signal could be attributed to the Kuroshio baroclinic instability waves, and the 20-day signal could be attributed to the surface eddy variations. Similar signals were noticed in the HYCOM data though the intensity was weak.
Key words:  northeastern Taiwan  Kuroshio intrusion  ADCP observations  HYCOM (Hybrid Coodrinate Ocean Model)
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