A Hybrid Method for Obtaining Improved Estimates of Ocean Surface Currents
编号:1300 访问权限:仅限参会人 更新:2024-10-14 15:03:29 浏览:194次 张贴报告

报告开始:2025年01月16日 19:20(Asia/Shanghai)

报告时间:15min

所在会场:[S54] Session 54-Remote Sensing of Coastal Zone and Sustainable Development [S54-P] Remote Sensing of Coastal Zone and Sustainable Development

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摘要
Simultaneous direct measurements of ocean surface currents over a broad spatial area are technically unfeasible nowadays. Alternatively, successive high-resolution satellite images have become essential resources for retrieving ocean surface currents. This study aims to retrieve accuracy of ocean surface currents with high accuracy using a hybrid method (HM) that combines the window deformation iterative multigrid method (WIDIMM) with the optical flow method (OFM). Compared to the traditional maximum cross-correlation method, the WIDIMM has already demonstrated significant advantages in handling rotational and deformational flow fields. However, it ends up obtaining coarser-resolution flow fields compared to the resolution of used satellite images. By integrating the WIDIMM with OFM, we find that compared to the retrieval results based on WIDIMM, the HM not only improves the spatial resolution of the retrieved flow field but also significantly enhances its accuracy, as evidenced by both idealized experiments and realistic applications. In addition, the HM exhibits higher kinetic energy levels since it can resolve smaller-scale processes. This study demonstrates the potential of applying HM to obtain ocean surface currents with high resolution and accuracy, which might play an essential role in the study of oceanic submesoscale processes.
关键词
Hybrid method, window deformation iterative multigrid, surface currents
报告人
Feng Ling
Master Xiamen University

稿件作者
Feng Ling Xiamen University
Hongyang Lin Xiamen University
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重要日期
  • 会议日期

    01月13日

    2025

    01月17日

    2025

  • 09月27日 2024

    初稿截稿日期

  • 01月17日 2025

    注册截止日期

主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
承办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
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