The Xiamen Symposium on Marine Environmental Sciences

2027 Xiamen Symposium on Marine Environmental Sciences

January 12-15, 2027

Understanding Global Mesoscale Eddy Vertical Tilt by Deep Learning
ID:132 Oral Presentation

2027-01-12 13:45 (China Standard Time)

Session:Session 38 - Oceanic (Sub)mesoscale Processes and Their Climate Impacts

Abstract
The vertical tilt of mesoscale eddies is a pervasive oceanic phenomenon. Here, we employ a Transformer-based deep learning model, EVTNet, to reconstruct this three-dimensional structure using global satellite and Argo data (2004–2021). EVTNet accurately reconstructs eddy vertical tilt characteristics, demonstrating robust agreement with independent in situ observations. We identify a depth-dependent divergence in tilt direction, which is opposite (~74%) between the upper (10–300 dbar) and deep (300–1000 dbar) oceans. This stratified behavior likely stems from wind forcing in the upper layer versus free baroclinic Rossby wave propagation below. The upper-ocean tilting distance is, on average, 2.5 times that observed in the deep ocean. Temporal evolution of eddy tilting distance follows three distinct patterns (decreasing, increasing then decreasing, and increasing), potentially modulated by eddy-eddy interactions. Furthermore, simulations suggest that eddy divergent tilting may facilitate submesoscale motion development. These findings offer new insights into the complex dynamics of mesoscale eddies.
Speaker
Hong Li Tianjin University

Author
Hong Li Tianjin University

    Important Dates

    • Jan 30

      2026

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    • Mar 31

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    • Jan 12–15

      2027

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