Accession Number : ADA570820


Title :   Hydrodynamics and Marine Optics during Cold Fronts at Santa Rosa Island, Florida


Descriptive Note : Journal article


Corporate Author : NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV


Personal Author(s) : Keen, Timothy R ; Stavn, Robert H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a570820.pdf


Report Date : Sep 2012


Pagination or Media Count : 16


Abstract : Observations of optical and hydrodynamic processes were made on the open beach on Santa Rosa Island, Florida, in March 1995. This study focuses on the passage of two cold fronts. The observations have been supplemented by a bio-optical model, a suite of hydrodynamic models to simulate coastal flows forced by waves, tides, local wind, and coastal sea level; and a geo-optical model that predicts scattering by mineral particles resuspended by wave action. These models have been used to examine the interaction of atmospheric forcing and hydrodynamics with respect to the observed marine hydrosol. The optical and hydrodynamic measurements, and the model results, have been used to conceive a cold-front regime model of the hydrosol for open beaches in the Gulf of Mexico. The optical environment during the cold front was determined by three hydrosol phases: (1) a prefrontal steady-state hydrosol consisting of fine resuspended mineral particles, phytoplankton cells, organic detritus, and colored dissolved organic matter; (2) a frontal phase dominated by resuspended mineral particles; and (3) a postfrontal hydrosol containing large phytoplankton, detritus, and fine mineral particles. This concept is useful for identifying the physical processes responsible for observed optical properties. It should be applicable to other regions and types of events.


Descriptors :   *COLD FRONTS , *HYDRODYNAMICS , *OPTICAL PROPERTIES , *SEDIMENTATION , *SUSPENDED SEDIMENTS , ABSORPTION SPECTRA , ATTENUATION , COASTAL REGIONS , COEFFICIENTS , ESTIMATES , FLOW , PARTICLES , PHYTOPLANKTON , SCATTERING , WATER WAVES


Subject Categories : Meteorology
      Physical and Dynamic Oceanography
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE