Accession Number : ADA333249

Title :   Generalized Drag Law Based on RASEX and FLIP Data

Descriptive Note : Final rept.

Corporate Author : OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES

Personal Author(s) : Mahrt, Larry

PDF Url : ADA333249

Report Date : 01 DEC 1997

Pagination or Media Count : 65

Abstract : The research supported by Grant N00014-1-96-0014 concentrated on formulating the drag coefficient and transfer coefficient for heat in the coastal zone using primarily 10 m data collected from an offshore instrumented mast during the Riso Air Sea Experiment (RASEX). This mast was located 2 km off of the Danish coast in 4 m of water. In "Fetch Limited Drag Coefficients" (Chapter 2) existing formulations of the surface roughness length and drag coefficient are evaluated. New formulations are recommended which better include the influence of wave state and fetch. In "Heat Flux in the Coastal Zone" (Chapter 3). the transfer coefficient for heat is found to be sensitive to the shallow depth of the internal boundary layer in offshore flow. As a result, existing parameterizations overestimate the heat flux by a factor of two. A new relationship is proposed for both the thermal roughness length and the transfer coefficient. Preliminary work has been completed on evaluation of the universal profile functions (nondimensional wind shear and temperature gradient functions) briefly summarized in Chapter 4. Chapter 5 presents work from several miscellaneous studies.

Descriptors :   *AIR WATER INTERACTIONS, *HEAT FLUX, COASTAL REGIONS, OCEAN SURFACE, BOUNDARY LAYER, MARINE ATMOSPHERES, TEMPERATURE GRADIENTS, WIND SHEAR, WIND VELOCITY, WIND STRESS, OFFSHORE, HEAT TRANSFER COEFFICIENTS.

Subject Categories : Atmospheric Physics
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE