############################################################################# # # # ww3_ts2 Test script for WW-III, fetch-limited growth. # # # # Model should be compiled with the switches : # # # # !/FLn !/LNn !/STn !/NLn !/BTn !/DBn !/TRn !/BSn !/XXn # # Select source term, growth needed, other opt. # # !/PRn Selecting one of the propagation schemes. # # 1: First order. # # 2: Representative for all UQ schemes # # !/WNX1 !/WNT1 !/CRX1 !/CRT1 Wind and current interpolation. # # !/O1 !/O2 !/O3 !/O4 !/O5 !/O6 !/O7 Sdt out output options. # # # # Remarks : # # - This test can be the basis of a fetch limited growth test for tuning # # a wave model. Some considerations should be made then. # # # # (i) Stable stationary conditions are reached fastest with the first # # order propagation scheme. The results deviate little from a # # higher order scheme as already pointed out in Tolman, (1992, # # JPO). The first order scheme is therefore most suitable for such # # tests. # # # # (ii) The third order scheme has some slightly discontinuous # # characteristics, which can interact with the nonlinear # # interactions. This leads to longer wiggling of the results in # # near stationary conditions, and also appears to be the reason # # for slight directional instabilities in this fetch-limited # # test. If the third order scheme is to be used, the !/PR2_UQ option # # with DTIME set as suggested in this script gives the most stable # # results. Directional instabilities disappear of the initial # # direction is shifted by half a directional step, using grid # # setup # # # # 1.1 0.041 28 24 0.5 # # # # It is not completely clear why the directional shift helps # # stabilizing the directional properties of the spectra, but it is # # assumed that this is related to the nonlinear interactions # # between the third order scheme and Snl as mentioned above. # # # # (iii) Note the effects of running with a one-dimensional case, where # # long swell almost perpendicular to the coast arives at the coast, # # whereas this energy is generally not observed at the coast in a # # model with limited width. # # * ww3_grid.inp : (default) # # + Spatial grid: 26x3 rectilinear Cartesian grid # # - dx = 25km, dy= 250km # # - Xrange = 0:625km deg, Yrange = -250:250km # # + Spectral grid: ntheta = 24, nf = 25, f1 = 0.042, fgamma = 1.1, # # grid offset by 0.5 Dtheta # # * switch options : (self explanatory) # # - switch_ST1_PR1 # # - switch_ST1_PR2_UNO # # - switch_ST1_PR2_UQ # # - switch_ST1_PR3_UNO # # - switch_ST1_PR3_UQ # # - switch_ST2_PR1 # # - switch_ST2_PR2_UNO # # - switch_ST2_PR2_UQ # # - switch_ST2_PR3_UNO # # - switch_ST2_PR3_UQ # # - switch_ST3_PR1 # # - switch_ST3_PR2_UNO # # - switch_ST3_PR2_UQ # # - switch_ST3_PR3_UNO # # - switch_ST3_PR3_UQ # # - switch_ST4_PR1 (default) # # - switch_ST4_PR2_UNO # # - switch_ST4_PR2_UQ # # - switch_ST4_PR3_UNO # # - switch_ST4_PR3_UQ # # - switch_ST6_PR1 # # - switch_ST6_PR2_UNO # # - switch_ST6_PR2_UQ # # - switch_ST6_PR3_UNO # # - switch_ST6_PR3_UQ # # # # Example run_test commands: # # (some details will vary by local system and configuration) # # ./bin/run_test -s ST1_PR1 -w work_ST1_PR1 ../model ww3_ts2 # # ./bin/run_test -s ST4_PR3_UQ -w work_ST4_PR3_UQ ../model ww3_ts2 # # # # Hendrik Tolman, Jun 2002 # # Last Mod : Aug 2013 # # # # Copyright 2009-2013 National Weather Service (NWS), # # National Oceanic and Atmospheric Administration. All rights # # reserved. WAVEWATCH III is a trademark of the NWS. # # No unauthorized use without permission. # # # #############################################################################