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Intraseasonal sea level variability along the western coast of India simulated by an eddy-resolving ocean general circulation model
  • Yoko Yamagami,
  • Tatsuo Suzuki,
  • Hiroaki Tatebe
Yoko Yamagami
Japan Agency for Marine-Earth Science and Technology

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Tatsuo Suzuki
Japan Agency for Marine-Earth Science and Technology
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Hiroaki Tatebe
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Future sea level rise under global warming poses serious risks of extreme sea level events in coastal regions worldwide. Numerous state-of-the-art climate models, with their relatively coarse horizontal resolution, may not adequately resolve coastal wave dynamics, leading to uncertainties in coastal sea level variability representation. This study compared eddy-resolving and non-eddying ocean models in reproducing sea level variability, focusing on the probability distribution along the western coast of India. The eddy-resolving model can simulate intraseasonal sea level variations associated with coastal waves driven by equatorial wind anomalies. The non-eddying model fails to capture over 81% of observed extreme sea level events, as shown in the probability distribution for intraseasonal time series. Although capable of simulating Indian Ocean Dipole-related low-frequency sea level anomalies, the non-eddying model does not replicate their connection to intraseasonal extreme events. The results suggest that climate model projections may underestimate future changes in extreme sea level events.
25 Feb 2024Submitted to ESS Open Archive
26 Feb 2024Published in ESS Open Archive