Highly resolved observations and simulations of the ocean response to a hurricane

Details Highly resolved observations and simulations of the ocean response to a hurricane Highly resolved observations and simulations of the ocean response to a hurricane

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3413604s&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 13, CiteID L13604

Physics

17

Oceanography: General: Numerical Modeling (0545, 0560), Oceanography: General: Ocean Predictability And Prediction (3238), Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: Physical: Upper Ocean And Mixed Layer Processes, Oceanography: Physical: Instruments And Techniques

Scientific paper

An autonomous, profiling float called EM-APEX was developed to provide a quantitative and comprehensive description of the ocean side of hurricane-ocean interaction. EM-APEX measures temperature, salinity and pressure to CTD quality and relative horizontal velocity with an electric field sensor. Three prototype floats were air-deployed into the upper ocean ahead of Hurricane Frances (2004). All worked properly and returned a highly resolved description of the upper ocean response to a category 4 hurricane. At a float launched 55 km to the right of the track, the hurricane generated large amplitude, inertially rotating velocity in the upper 120 m of the water column. Coincident with the hurricane passage there was intense vertical mixing that cooled the near surface layer by about 2.2°C. We find consistent model simulations of this event provided the wind stress is computed from the observed winds using a high wind-speed saturated drag coefficient.

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