To reduce the WRF-Chem simulation time
Aparna C
Hi All,
I am running a WRF-Chem simulation for a duration of 5 days. However, it is taking nearly 20 hours to simulate each day's output. My current configuration is:
-
Grid spacing (dx) = 10 km
-
Time step = 45 seconds
-
Number of processors = 44
Can anyone suggest how I can speed up the model to generate the output files faster?
Thanks in advance!
&time_control
run_days = 0,
run_hours = 0,
run_minutes = 0,
run_seconds = 0,
start_year = 2020, 2024,
start_month = 01, 03,
start_day = 11, 26,
start_hour = 00, 00,
end_year = 2020, 2024,
end_month = 01, 06,
end_day = 16, 05,
end_hour = 00, 00,
interval_seconds = 21600
input_from_file = .true.,.true.,
history_interval = 1440, 60,
frames_per_outfile = 1, 1,
restart = .false.,
restart_interval = 7200,
io_form_history = 2
io_form_restart = 2
io_form_input = 2
io_form_boundary = 2
debug_level = 100,
history_outname = '/nfs3/aparna/MACC/wrf_new/wrf_out_macc_<domain>_<date>'
rst_inname = '/nfs3/aparna/MACC/wrf_new/wrfrst__d<domain>_<date>'
rst_outname = '/nfs3/aparna/MACC/wrf_new/wrfrst__d<domain>_<date>'
io_form_auxinput5 = 2,
auxinput5_inname = 'wrfchemi_<hour>z_d<domain>'
frames_per_auxinput5 = 12,
auxinput5_interval_m = 60,
io_form_auxinput6 = 2,
auxinput6_inname = 'wrfbiochemi_d<domain>'
auxinput6_interval_m = 86400,
io_form_auxinput7 = 2,
auxinput7_inname = 'wrffirechemi_d<domain>_<date>',
auxinput7_interval_m = 60,
frames_per_auxinput7 = 1,
force_use_old_data = .true.,
/
&domains
time_step = 45,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 1,
e_we = 420, 220,
e_sn = 400, 214,
e_vert = 34, 45,
p_top_requested = 5000,
num_metgrid_levels = 34,
num_metgrid_soil_levels = 4,
dx = 10000,
dy = 10000,
grid_id = 1, 2,
parent_id = 1, 1,
i_parent_start = 1, 53,
j_parent_start = 1, 25,
parent_grid_ratio = 1, 3,
parent_time_step_ratio = 1, 3,
feedback = 0,
smooth_option = 0
/
&physics
mp_physics = 10, -1,
cu_physics = 3, -1,
ra_lw_physics = 1, -1,
ra_sw_physics = 2, -1,
bl_pbl_physics = 1, -1,
sf_sfclay_physics = 1, -1,
sf_surface_physics = 2, -1,
radt = 30, 15,
bldt = 0, 0,
cudt = 0, 0,
icloud = 1,
num_land_cat = 21,
sf_urban_physics = 1, 0,
fractional_seaice = 1,
shcu_physics = 3,
progn = 1,
cu_rad_feedback = .true.,
cu_diag = 1,
cugd_avedx = 1,
mp_zero_out = 2,
mp_zero_out_thresh = 1.e-8,
sst_update = 0,
/
&fdda
grid_fdda = 2,
gfdda_inname = 'wrffdda_d<domain>,
gfdda_interval_m = 360,
gfdda_end_h = 9999,
io_form_gfdda = 2,
if_no_pbl_nudging_ph = 1,
if_no_pbl_nudging_t = 1,
if_no_pbl_nudging_uv = 1,
if_zfac_uv = 0,
gph = 0.0003,
gt = 0.0003,
guv = 0.0003,
xwavenum = 3,
ywavenum = 3,
/
&dynamics
hybrid_opt = 2,
w_damping = 1,
diff_opt = 1, 2,
km_opt = 4, 4,
diff_6th_opt = 0, 0,
diff_6th_factor = 0.12, 0.12,
base_temp = 290.
damp_opt = 3,
zdamp = 5000., 5000.,
dampcoef = 0.2, 0.2,
khdif = 0, 0,
kvdif = 0, 0,
non_hydrostatic = .true., .true.,
moist_adv_opt = 2, 1,
scalar_adv_opt = 2, 1,
gwd_opt = 1, 0,
rk_ord = 3,
chem_adv_opt = 2,
tke_adv_opt = 2,
time_step_sound = 4,
h_mom_adv_order = 5,
v_mom_adv_order = 3,
h_sca_adv_order = 5,
v_sca_adv_order = 3,
/
&bdy_control
spec_bdy_width = 5,
specified = .true.
/
&grib2
/
&chem
kemit = 1,
chem_opt = 112,
bioemdt = 30,
photdt = 30,
chemdt = 5,
io_style_emissions = 1,
emiss_inpt_opt = 111,
emiss_opt = 8,
phot_opt = 1,
gas_drydep_opt = 1,
aer_drydep_opt = 1,
bio_emiss_opt = 3,
dust_opt = 0,
dmsemis_opt = 0,
seas_opt = 0,
gas_bc_opt = 1,
gas_ic_opt = 1,
aer_bc_opt = 1,
aer_ic_opt = 1,
gaschem_onoff = 1,
aerchem_onoff = 1,
wetscav_onoff = 1,
cldchem_onoff = 0,
vertmix_onoff = 1,
chem_conv_tr = 1,
biomass_burn_opt = 2,
plumerisefire_frq = 60,
scale_fire_emiss = .true.,
aer_ra_feedback = 1,
have_bcs_chem = .true.,
conv_tr_wetscav = 0,
emiss_opt_vol = 0,
aircraft_emiss_opt = 0,
ne_area = 210,
diagnostic_chem = 0,
chemdiag = 1,
/
&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 1,
/
