tide_start and ADCIRC

[jmrogers]

HI all,

I'm modeling Rhode Island Sound and Narragansett Bay and we have been using ADCIRC harmonics from 2004 for the southern boundary tidal forcing. I'm trying to model summer 2006 now and things are not going as well. I tried just adding two years with tide_start but haven't had much luck. Would the tide origin for harmonics_2004.mat be Jan 1, 2004? I know little about where this mat-file came from.

Other tricky part is the tidal wave develops a significant(ly wrong) M4 component as it travels up the Bay. I've tried reducing bottom drag but that doesn't have much of an effect. Should I be more concerned with momentum mixing parameterizations?

Cheers,
Justin
URI GSO

100x200x15 curvilinear grid
CPPDEFS:
ANA_BSFLUX Analytical kinematic bottom salinity flux.
ANA_BTFLUX Analytical kinematic bottom temperature flux.
ANA_SRFLUX Analytical kinematic shortwave radiation flux.
ANA_SSFLUX Analytical kinematic surface salinity flux.
ASSUMED_SHAPE Using assumed-shape arrays.
AVERAGES Writing out time-averaged fields.
BULK_FLUXES Surface bulk fluxes parametererization.
CURVGRID Orthogonal curvilinear grid.
DIAGNOSTICS_TS Computing and writing tracer diagnostic terms.
DIAGNOSTICS_UV Computing and writing momentum diagnostic terms.
DIFF_GRID Horizontal diffusion coefficient scaled by grid size.
DJ_GRADPS Parabolic Splines density Jacobian (Shchepetkin, 2002).
DOUBLE_PRECISION Double precision arithmetic.
EASTERN_WALL Wall boundary at Eastern edge.
FSOBC_REDUCED Using free-surface data in reduced physics condtions
GLS_MIXING Generic Length-Scale turbulence closure.
MASKING Land/Sea masking.
MIX_GEO_TS Mixing of tracers along geopotential surfaces.
MIX_S_UV Mixing of momentum along constant S-surfaces.
MPI MPI distributed-memory configuration.
NONLINEAR Nonlinear Model.
NONLIN_EOS Nonlinear Equation of State for seawater.
NORTHERN_WALL Wall boundary at Northern edge.
POWER_LAW Power-law shape time-averaging barotropic filter.
PROFILE Time profiling activated .
K_GSCHEME Third-order upstream bias advection of TKE fields.
!RST_SINGLE Double precision fields in restart NetCDF file.
SALINITY Using salinity.
SOLVE3D Solving 3D Primitive Equations.
SOUTH_M2FLATHER Southern edge, 2D momentum, Flather condition.
SOUTH_M3NUDGING Southern edge, 3D momentum, passive/active outflow/inflow.
SOUTH_M3RADIATION Southern edge, 3D momentum, radiation condition.
SOUTH_TNUDGING Southern edge, tracers, passive/active outflow/inflow.
SOUTH_TRADIATION Southern edge, tracers, radiation condition.
SPLINES Conservative parabolic spline reconstruction.
SSH_TIDES Add tidal elevation to SSH climatology.
STATIONS Writing out station data.
TS_A4HADVECTION Fouth-order Akima horizontal advection of tracers.
TS_A4VADVECTION Fouth-order Akima vertical advection of tracers.
TS_DIF2 Harmonic mixing of tracers.
TS_PSOURCE Tracers point sources and sinks.
UV_ADV Advection of momentum.
UV_COR Coriolis term.
UV_U3HADVECTION Third-order upstream bias advection of momentum.
UV_LOGDRAG Logarithmic bottom stress.
UV_PSOURCE Mass point sources and sinks.
UV_TIDES Add tidal currents to 2D momentum climatologies.
UV_VIS2 Harmonic mixing of momentum.
VAR_RHO_2D Variable density barotropic mode.
VISC_GRID Horizontal viscosity coefficient scaled by grid size.
WEST_M2FLATHER Western edge, 2D momentum, Flather condition.
WEST_M3RADIATION Western edge, 3D momentum, radiation condition.
WEST_TRADIATION Western edge, tracers, radiation condition.

[nacholibre]

Hello Justin,
Did changing the momentum mixing parameters make any change for your case? I am also getting weaker currents in my model than expected and you are right about the bottom drag.
Did you find out any parameters that may help tweaking the results?
Thanks,
Zafer