Column model pr

exp/test_cases/README.md

@@ -6,6 +6,9 @@
 `bucket_hydrology`
 * As described in Isca paper (Vallis et al., 2017) but without q-fluxes
 
+`column_test_case`
+* Single column configuration of Isca. Please cite McKim et al. (2024, submitted) (<https://doi.org/10.22541/essoar.170904795.55675140/v1>) if you use the SCM. 
+
 `frierson`
 * Control case of the so-called `Frierson model` described in e.g. <https://doi.org/10.1175/JAS3753.1>
 

exp/test_cases/ape_aquaplanet/socrates_ape_aquaplanet_T42.py

@@ -107,8 +107,8 @@
         'do_read_ozone': True,
         'ozone_file_name':'ozone_1990',
         'ozone_field_name':'ozone_1990',
-        'dt_rad':4320.,
-        'solday':90., #turn off seasonal cycle - diurnal by default
+        'dt_rad':4320,
+        'solday':90, #turn off seasonal cycle - diurnal by default
         'co2_ppmv':348.0,
         'store_intermediate_rad':True,
         'chunk_size': 16,

exp/test_cases/axisymmetric/axisymmetric_test_case.py

@@ -142,6 +142,7 @@
         'do_read_ozone':True,
         'ozone_file':'ozone_1990',
         'dt_rad': 3600, #Set RRTM radiation timestep to 3600 seconds, meaning it runs every 5 atmospheric timesteps
+
     },
 
     # FMS Framework configuration
@@ -183,4 +184,4 @@
 if __name__=="__main__":
     exp.run(1, use_restart=False, num_cores=NCORES)
     for i in range(2,121):
-        exp.run(i, num_cores=NCORES)
+        exp.run(i, num_cores=NCORES)

exp/test_cases/column_test_case/column_test.py

@@ -0,0 +1,202 @@
+""" 
+This script configures a column model that uses Isca's columnwise physics routines. 
+
+Single column configuration of Isca. Please cite McKim et al. (2024, submitted) (https://doi.org/10.22541/essoar.170904795.55675140/v1) if you use the SCM. 
+
+Useful for testing new convection / radiation parametrizations, as the dynamical core is 
+bypassed so the model runs a gazillion times faster (especially if you're only simulating
+one column). Can in principle simulate many (in lat and lon) at the same time. 
+
+The wind is prescribed (it needs to be non-zero at the surface to allow for latent and 
+sensible surface heat fluxes). Currently the user can set a namelist variable 'surface_wind'
+that sets u_surf and v_surf = surface_wind / sqrt(2), so that wind_surf = sqrt(u_surf**2 + 
+v_surf**2) = surface_wind. u and v at all other altitudes are set to zero (hardcoded). 
+
+At the moment the model needs to use the vertical turbulent diffusion parameterization in order 
+for the mixed layer code to work. This is not very consistent as the u and v wind are prescribed 
+and so the u,v tendenency from the diffusion is thrown away. Hence an implicit assumption when 
+using the column model is that 'the dynamics' would restore the surface winds to their prescribed 
+speed, so that du/dt total is zero. 
+
+The column model is currently initiated as a bit of a hack. The line 
+
+'from isca import ColumnCodeBase'
+
+sets a compiler flag -DCOLUMN_MODEL that tells the model to use the following files: 
+
+atmos_column/column.F90
+atmos_column/column_grid.F90
+atmos_column/column_init_cond.F90
+atmos_column/column_initialize_fields.F90
+
+to initialize the model (including constructing the model grid), do the model timestepping 
+(using a leapfrog scheme as before), and  handle input/output. 
+
+Works with either hs_forcing, or the physics packages in idealized_moist_phys. Even when 
+multiple columns are simulated, the model can only run on 1 core at the moment (will endeavour 
+to fix this as some point). Also, the column model cannot read in topography input files. 
+
+Any questions to Neil Lewis:  
+n.t.lewis@exeter.ac.uk
+"""
+
+
+import os
+
+import numpy as np
+
+from isca import ColumnCodeBase, DiagTable, Experiment, Namelist, GFDL_BASE
+
+
+# column model only uses 1 core
+NCORES = 1
+
+# compile code 
+base_dir = os.path.dirname(os.path.realpath(__file__))
+cb = ColumnCodeBase.from_directory(GFDL_BASE)
+cb.compile() 
+
+# create an Experiment object to handle the configuration of model parameters
+exp = Experiment('column_test_exp', codebase=cb)
+
+#Tell model how to write diagnostics
+diag = DiagTable()
+diag.add_file('atmos_monthly', 30, 'days', time_units='days')
+
+#Tell model which diagnostics to write
+diag.add_field('column', 'ps', time_avg=True)
+diag.add_field('column', 'bk')
+diag.add_field('column', 'pk')
+diag.add_field('atmosphere', 'precipitation', time_avg=True)
+diag.add_field('mixed_layer', 't_surf', time_avg=True)
+diag.add_field('mixed_layer', 'flux_lhe', time_avg=True)
+diag.add_field('column', 'sphum', time_avg=True)
+diag.add_field('column', 'ucomp', time_avg=True)
+diag.add_field('column', 'vcomp', time_avg=True)
+diag.add_field('column', 'temp', time_avg=True)
+diag.add_field('two_stream', 'swdn_toa', time_avg=True)
+diag.add_field('atmosphere', 'dt_ug_diffusion', time_avg=True)
+diag.add_field('atmosphere', 'dt_vg_diffusion', time_avg=True)
+exp.diag_table = diag
+
+#Empty the run directory ready to run
+exp.clear_rundir()
+
+#Define values for the 'core' namelist
+exp.namelist = namelist = Namelist({
+    'main_nml':{
+     'days'   : 360,
+     'hours'  : 0,
+     'minutes': 0,
+     'seconds': 0,
+     'dt_atmos':1440,
+     'current_date' : [1,1,1,0,0,0],
+     'calendar' : 'thirty_day'
+    },
+
+    'atmosphere_nml': {
+        'idealized_moist_model': True
+    },
+
+    'column_nml': {
+        'lon_max': 1, # number of columns in longitude, default begins at lon=0.0
+        'lat_max': 1, # number of columns in latitude, precise 
+                      # latitude can be set in column_grid_nml if only 1 lat used. 
+        'num_levels': 31,  # number of levels 
+        'initial_sphum': 1e-3, 
+        'q_decrease_only':True, # constrain q in stratosphere
+    },
+
+    'column_grid_nml': { 
+        'lat_value': np.rad2deg(np.arcsin(1/np.sqrt(3))) # set latitude to that which causes insolation in frierson p2 radiation to be insolation / 4. 
+        #'global_average': True # don't use this option at the moment
+    },
+
+    # set initial condition, NOTE: currently there is not an option to read in initial condition from a file (aside from a restart file). 
+    'column_init_cond_nml': {
+        'initial_temperature': 264., # initial atmospheric temperature 
+        'surf_geopotential': 0.0, # applied to all columns 
+        'surface_wind': 5. # as described above 
+    },
+
+    'idealized_moist_phys_nml': {
+        'do_damping': False, # no damping in column model, surface wind prescribed 
+        'turb':True,        
+        'mixed_layer_bc':True, 
+        'do_simple': True, # simple RH calculation 
+        'roughness_mom': 3.21e-05, 
+        'roughness_heat':3.21e-05,
+        'roughness_moist':3.21e-05,                
+        'two_stream_gray': True,     #Use grey radiation
+        'convection_scheme': 'SIMPLE_BETTS_MILLER', #Use the simple Betts Miller convection scheme 
+        'do_lcl_diffusivity_depth':True, # use convection scheme LCL height to set PBL depth 
+    },
+
+    'two_stream_gray_rad_nml': {
+        'rad_scheme': 'frierson',            #Select radiation scheme to use, which in this case is Frierson
+        'do_seasonal': False,                #do_seasonal=false uses the p2 insolation profile from Frierson 2006. do_seasonal=True uses the GFDL astronomy module to calculate seasonally-varying insolation.
+        'atm_abs': 0.2,                      # default: 0.0        
+    },
+
+    'qe_moist_convection_nml': {
+        'rhbm':0.7, # rh criterion for convection 
+        'Tmin':160., # min temperature for convection scheme look up tables 
+        'Tmax':350.  # max temperature for convection scheme look up tables 
+    },
+
+    'lscale_cond_nml': {
+        'do_simple':True, # only rain 
+        'do_evap':False,  # no re-evaporation of falling precipitation 
+    },
+
+    'surface_flux_nml': {
+        'use_virtual_temp': True, # use virtual temperature for BL stability 
+        'do_simple': True,
+        'old_dtaudv': True    
+    },
+
+    'vert_turb_driver_nml': { 
+        'do_mellor_yamada': False,     # default: True
+        'do_diffusivity': True,        # default: False
+        'do_simple': True,             # default: False
+        'constant_gust': 0.0,          # default: 1.0
+        'use_tau': False
+    },
+
+    #Use a large mixed-layer depth, and the Albedo of the CTRL case in Jucker & Gerber, 2017
+    'mixed_layer_nml': {
+        'tconst' : 285.,
+        'prescribe_initial_dist':False,
+        'evaporation':True,   
+        'depth': 2.5,                          #Depth of mixed layer used
+        'albedo_value': 0.30,                  #Albedo value used             
+    },
+
+    'sat_vapor_pres_nml': {
+        'do_simple':True, 
+    },
+
+    # define pressure coordinate 
+    'vert_coordinate_nml': {
+        'bk': [0.000000, 0.0117665, 0.0196679, 0.0315244, 0.0485411, 0.0719344, 0.1027829, 0.1418581, 0.1894648, 0.2453219, 0.3085103, 0.3775033, 0.4502789, 0.5244989, 0.5977253, 0.6676441, 0.7322627, 0.7900587, 0.8400683, 0.8819111, 0.9157609, 0.9422770, 0.9625127, 0.9778177, 0.9897489, 1.0000000],
+        'pk': [0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000],
+       },
+
+    # FMS Framework configuration
+    'diag_manager_nml': {
+        'mix_snapshot_average_fields': False  # time avg fields are labelled with time in middle of window
+    },
+    'fms_nml': {
+        'domains_stack_size': 600000                        # default: 0
+    },
+    'fms_io_nml': {
+        'threading_write': 'single',                         # default: multi
+        'fileset_write': 'single',                           # default: multi
+    },
+})
+
+#Lets do a run!
+if __name__=="__main__":
+    exp.run(1, use_restart=False, num_cores=NCORES, mpirun_opts='--bind-to socket')
+    for i in range(2,11):
+        exp.run(i, num_cores=NCORES, mpirun_opts='--bind-to socket')