| 基于卫星高度计和漂流浮标数据间数学校验关系的黑潮流轴和流路主成分估计 |
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| 引用本文： | 庄展鹏,回贞立,杨光兵,赵新华,袁业立.基于卫星高度计和漂流浮标数据间数学校验关系的黑潮流轴和流路主成分估计[J].海洋学报(英文版),2020,39(1):14-24. |
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| 作者姓名： | 庄展鹏 回贞立 杨光兵 赵新华 袁业立 |
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| 作者单位： | 自然资源部第一海洋研究所, 青岛, 266100;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室, 青岛, 266237,自然资源部第一海洋研究所, 青岛, 266100;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室, 青岛, 266237,自然资源部第一海洋研究所, 青岛, 266100;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室, 青岛, 266237,中国科学院海洋研究所, 青岛, 266071,自然资源部第一海洋研究所, 青岛, 266100;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室, 青岛, 266237 |
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| 基金项目： | 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. |
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| 摘 要： | 由于卫星高度计数据分辨率高、观测范围广的特点，我们使用该数据开展了黑潮流的研究。在之前的研究中，卫星绝对地转流都被用于对黑潮流域的表层流场的时空变化特征进行研究，并采用了一些探测方法提取了黑潮流轴和流路。然而，海面绝对地转流是由绝对动力地形估计得到，应该被当做实际流场的地转分量，在实际应用中并不能代表真实流场。在本研究中，建立了气候态绝对地转流与网格平均的漂流浮标流场间的数学校验关系，以此对卫星绝对地转流场进行修正，即便这两种数据的性质存在些许偏差。因此，基于主成分探测法，修正后的卫星绝对地转流被用于探测黑潮流轴和流路。对比结果表明，由修正后的卫星地转流场探测得到的黑潮流轴和流路均要好于地转流和表层流估计结果。修正后的地转流有助于开展更加准确的黑潮流轴和流路的逐日探测。
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| 关 键 词： | 黑潮流轴探测 黑潮流路探测 数学校验 卫星绝对地转流 主成分探测 |
| 收稿时间： | 2018/12/12 0:00:00 |
Principal-component estimates of the Kuroshio Current axis and path based on the mathematical verification between satellite altimeter and drifting buoy data |
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| Zhuang Zhanpeng,Hui Zhenli,Yang Guangbing,Zhao Xinhua and Yuan Yeli.Principal-component estimates of the Kuroshio Current axis and path based on the mathematical verification between satellite altimeter and drifting buoy data[J].Acta Oceanologica Sinica,2020,39(1):14-24. |
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| Authors: | Zhuang Zhanpeng Hui Zhenli Yang Guangbing Zhao Xinhua and Yuan Yeli |
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| Institution: | 1.The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266100, China2.Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China3.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China |
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| Abstract: | 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 spatio-temporal 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. |
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| Keywords: | Kuroshio axis detection Kuroshio path detection mathematical verification satellite absolute geostrophic velocity principal-component detection |
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