Hyodae Seo, Art Miller and John Roads Scripps Institution of Oceanography

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Modeling of Regional Ocean-Atmosphere Feedback in the Eastern Equatorial Pacific; Tropical Instability Waves


  • Introduce the regional coupled model

  • Discuss the stability adjustment of the atmospheric boundary layer (ABL) due to undulating SST front by TIWs.

  •  Altering heat flux

  • Coupling with wind stress

  • Work in progress and summary

Regional coupled model

Scripps Coupled Ocean-Atmosphere Regional (SCOAR) Model

Eastern equatorial Pacific domain; Review of ocean-atmoshere system

Changes in stability of ABL due to evolving SST

Modeled stability changes in ABL due to SST

Temporal and spatial associations: Combined EOFs of SST and wind stress

Modification of heat flux

Coupling of SST and wind stress and synchronous westward propagation

Coupling of wind stress and SST

Westward Propagation in the model

  • Co-propagation of SST and wind stress

  • Weaker coupling coefficient in the model than in the observations (e.g. Chelton et al., 2001)

Work in progress


  • A high-resolution coupled model has been developed and used in the various regions.

  • Main purpose is to investigate the ocean-atmosphere feedback on ocean mesoscale spatial and time scales.

  • Evolving SST front perturbed by the TIWs alters vertical stratification of ABL.  This leads to responses from ...

  •  the turbulent and radiative (implied from the model) heat flux, thus changing thermal component of the atmospheric forcing; a negative feedback.

  •  wind stress and its derivative fields, thus induces dynamic feedback from the atmosphere forcing; This feedback effect still remains uncertain.

Comments or questions? Thanks!

Dependence of wind stress derivatives on the alignment

Air-sea coupling in California coastal ocean

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