A High Resolution Ocean Model with Variable Forcing of Wind, Heat, and Freshwater: Initial Evaluation
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Authors
Tokmakian, Robin
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1998-09
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Abstract
A new model (POCM_4C) run of the high resolution (1/4°
Semtner/Chervin Parallel Ocean Climate Model) has been
completed which incorporates the use of daily varying
surface fluxes of momentum, heat, and freshwater over a
period of 18 years from 1979 though 1996 (soon to be
through 1998). The basic formulation of the model is
described in Semtner and Chervin, 1992. The model run
differs from the previous run (POCM 4B Stammer et al.,
1996) by the modification of the tracer equations for
temperature and salinity to incorporate realistic time varying
fluxes. The previous model run included only time varying
winds with a monthly heat and freshwater climatology
applied. The fluxes used to force the current simulation are
computed from the ECMWF reanalysis data set for the
period of 1979 to 1993; after which the operational fields
from ECMWF are used for the forcing (1994–present). Part
of the goal of these model runs is to attempt to understand
the intrinsic variability in the model versus that which is
forced from the variable surface conditions on time scales
longer than annual. It is a further goal of this research to
examine which surface signals can be used to monitor
subsurface changes related to the various climate indices
(e.g. North Atlantic Oscillation or North Pacific Indices).
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International WOCE Newsletter, Number 32, ISSN 1029-1725, September 1998
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.