Article

Ocean Dynamics

, Volume 64, Issue 11, pp 1535-1554

First online:

Investigation of hurricane Ivan using the coupled ocean–atmosphere–wave–sediment transport (COAWST) model

  • Joseph B. ZambonAffiliated withDepartment of Marine, Earth and Atmospheric Sciences, North Carolina State University
  • , Ruoying HeAffiliated withDepartment of Marine, Earth and Atmospheric Sciences, North Carolina State University Email author 
  • , John C. WarnerAffiliated withUnited States Geological Survey

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Abstract

The coupled ocean–atmosphere–wave–sediment transport (COAWST) model is used to hindcast Hurricane Ivan (2004), an extremely intense tropical cyclone (TC) translating through the Gulf of Mexico. Sensitivity experiments with increasing complexity in ocean–atmosphere–wave coupled exchange processes are performed to assess the impacts of coupling on the predictions of the atmosphere, ocean, and wave environments during the occurrence of a TC. Modest improvement in track but significant improvement in intensity are found when using the fully atmosphere–ocean-wave coupled configuration versus uncoupled (e.g., standalone atmosphere, ocean, or wave) model simulations. Surface wave fields generated in the fully coupled configuration also demonstrates good agreement with in situ buoy measurements. Coupled and uncoupled model-simulated sea surface temperature (SST) fields are compared with both in situ and remote observations. Detailed heat budget analysis reveals that the mixed layer temperature cooling in the deep ocean (on the shelf) is caused primarily by advection (equally by advection and diffusion).

Keywords

Coupled modeling Hurricane Ocean dynamics