Accession Number : ADA140730

Title :   Response of an Atmospheric Prediction Model to Time-Dependent Sea-Surface Temperatures.

Descriptive Note : Master's thesis,


Personal Author(s) : Ranelli,P H

PDF Url : ADA140730

Report Date : Mar 1984

Pagination or Media Count : 113

Abstract : The purpose of this research is to explore the need for time-dependent sea-surface temperatures in atmospheric model predictions up to 10 days. The Navy Operational Global Atmospheric Prediction System is used in this study. First, a control run is made in which the sea-surface temperature (SST) is fixed in time. In the test case, the observed SST analyzed each 12 hours by the Fleet Numerical Oceanography Center are used to force the system. The 10-day predictions are compared to determine if a coupled atmosphere-ocean model would improve or deteriorate the atmospheric predictions. The case analyzed occurred after the oceanic spring transition so that only small increases in SST occurred. Use of time-dependent SST resulted in only small changes in latent, sensible and total heat fluxes, and in storm tracks and intensities. Thus, further case studies of the atmospheric response are necessary to indicate whether coupled atmosphere-ocean models are required on 10-day time scales.

Descriptors :   *Weather forecasting, *Air water interactions, Atmosphere models, Mathematical models, Mathematical prediction, Computerized simulation, Accuracy, Ocean surface, Surface temperature, Heat flux, Cyclones, Storms

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE