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Run 1: COADS forcing Run 2: ECMWF Forcing Run 3: ECMWF Daily Forcing
Model Configuration

Domain

North and Equatorial Atlantic (28oS to 70oN) including the Mediterranean Sea, with a horizontal resolution of 1/12o (mesh size on the order of 6 km on average) and 20 layers in the vertical. Bottom topography is derived from the ETOPO 2.5 quality-controlled data set.

Relaxation to observed monthly T and S (Levitus, 1982) in 3o wide buffer zones with relaxation times of 5 days at the northern and southern wall boundaries (28oS, 70oN) increasing to 30 days at the inner edge of the buffer zones.

Forcing

  • ECMWF monthly climatology from the 1979-1993 reanalysis.
  • The fields used in the forcing are wind stress vector, wind velocity, surface radiation, specific humidity, air temperature, and precipitation (from COADS).
  • The heat flux is calculated using bulk formulae from surface radiation, air temperature, specific humidity, wind speed and model SST.
  • The fresh water flux consists of E-P (evaporation obtained from wind speed, specific humidity and model SST, precipitation from COADS), plus a small relaxation to observed surface salinity.

Mixing parameterization

  • Richardson number dependent diapycnal mixing, plus entrainment parameterization as in Hallberg (2000).
  • thickness diffusion, momentum and temp/salin mixing as in COADS run.

Integration time

This simulation has been integrated for 6 years. Starting from the state at the end of year 5, 8 years with 6 hourly ECMWF forcing were integrated .

Computational requirements

Same as in COADS run.

Results

Chassignet and Garraffo, 2001. Submitted for publication: Lumpkin and Garraffo,2004.

Veneziani et al (2004) results on numerical floats: LAPCOD reseach.

 

 

 

Last Modified on October 14, 2004
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