WRF-ARW 3.4 winds too strong in nest when it is started after parent domain
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WRF-ARW 3.4 winds too strong in nest when it is started after parent domain
Edit:
Some new important information has been discovered, keep reading below this post, especially on the PAGE 2 of this thread. Issue is still unresolved.
Hello.
I compiled ARW 3.4 and put it into my wrfems installation instead of 3.3.1 that works OK. But I have strange issue. 10m wind speeds are now way much stronger than in 3.3.1. At least a double speeds, everywhere, in all nests and in mother domain. I use all other settings (namelist, domains, etc.) the same, just replaced with new binaries.
Anybody of you tried ARW 3.4 already?
Some new important information has been discovered, keep reading below this post, especially on the PAGE 2 of this thread. Issue is still unresolved.
Hello.
I compiled ARW 3.4 and put it into my wrfems installation instead of 3.3.1 that works OK. But I have strange issue. 10m wind speeds are now way much stronger than in 3.3.1. At least a double speeds, everywhere, in all nests and in mother domain. I use all other settings (namelist, domains, etc.) the same, just replaced with new binaries.
Anybody of you tried ARW 3.4 already?
Last edited by meteoadriatic on Fri Apr 27, 2012 10:53 pm, edited 5 times in total.
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Re: WRF-ARW 3.4 10m wind too strong
Can you please share your namelist.input? Thx a lot!
Re: WRF-ARW 3.4 10m wind too strong
On Your PM.
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Re: WRF-ARW 3.4 10m wind too strong
Conclusion.
I don't know where was the problem, but I made tests on different computer with different wrfems installation and there works OK. So I reinstalled wrfems on production computer, put v3.4 there and new TBL files and did few namelist mods and now new ARW is ready for publishing.
I don't know where was the problem, but I made tests on different computer with different wrfems installation and there works OK. So I reinstalled wrfems on production computer, put v3.4 there and new TBL files and did few namelist mods and now new ARW is ready for publishing.
Re: WRF-ARW 3.4 10m wind too strong
What kind of modification ? No impact on wind speed ?did few namelist mods
Maybe also a TBL file not correct initially ? A wrong file with inapropriate roughness values ?
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Re: WRF-ARW 3.4 10m wind too strong
Well, I have to correct myself again.
I tested only 6 hours on test system and it was ok. But, in longer simulations still isn't OK. Winds somehow accelerates inside domain during time, especially into nests and toward the centre of domain. Near domain borders, where there is infulence from upper nest boundary conditions, wind is much better simulated then near domain centre where is at least double than realistic.
Example:
http://img204.imageshack.us/img204/8436/windu.png
this is 10m wind speed in m/s. Over 35m/s at maximum, realistic is not more than 15m/s there (as v3.3 gives). You can see how near domain border where is strong influence from outside nest, wind is MUCH slower then near centre.
No idea, I did changed everything in configuration I could. Almost every single entry in namelist I changed to something else. Every runable configuration with 3.4 binaries, gives this issue.
I lastly compiled also WPS, geogrid, metgrid, ungrib. Replaced them, recreated domain again. Replaced also all TBLs and Vtables with those that come with WRF and WPS 3.4 release. Nothing changed, at all. Issue is still there.
This is the last namelist I come up with, however, I don't believe the problem is somewhat in there because I changed almost everything:
Also, wrote wrfhelp, still waiting for reply.
Update: I also checked rsl_error.0000 outputs from real and from wrf, they are almost the same in v3.3 and v3.4, no significant differences between versions.
Surgeon: which compiler did you used?
Any further suggestion? Thx
I tested only 6 hours on test system and it was ok. But, in longer simulations still isn't OK. Winds somehow accelerates inside domain during time, especially into nests and toward the centre of domain. Near domain borders, where there is infulence from upper nest boundary conditions, wind is much better simulated then near domain centre where is at least double than realistic.
Example:
http://img204.imageshack.us/img204/8436/windu.png
this is 10m wind speed in m/s. Over 35m/s at maximum, realistic is not more than 15m/s there (as v3.3 gives). You can see how near domain border where is strong influence from outside nest, wind is MUCH slower then near centre.
No idea, I did changed everything in configuration I could. Almost every single entry in namelist I changed to something else. Every runable configuration with 3.4 binaries, gives this issue.
I lastly compiled also WPS, geogrid, metgrid, ungrib. Replaced them, recreated domain again. Replaced also all TBLs and Vtables with those that come with WRF and WPS 3.4 release. Nothing changed, at all. Issue is still there.
This is the last namelist I come up with, however, I don't believe the problem is somewhat in there because I changed almost everything:
Code: Select all
cat static/namelist.wrfm
&time_control
start_year = 2012, 2012
start_month = 04, 04
start_day = 15, 15
start_hour = 06, 18
start_minute = 00, 00
start_second = 00, 00
end_year = 2012, 2012
end_month = 04, 04
end_day = 17, 17
end_hour = 00, 00
end_minute = 00, 00
end_second = 00, 00
interval_seconds = 10800
input_from_file = T, T
history_interval = 180, 180
history_outname = "wrfout_d<domain>_<date>"
frames_per_outfile = 1, 1
io_form_history = 2
io_form_input = 2
io_form_restart = 2
io_form_boundary = 2
io_form_auxinput2 = 2
restart = F
restart_interval = 5040
auxhist1_outname = "sfcout_d<domain>_<date>"
auxhist1_interval = 0, 0
frames_per_auxhist1 = 1, 1
io_form_auxhist1 = 2
auxhist2_outname = "auxhist2_d<domain>_<date>"
auxhist2_interval = 0, 0
frames_per_auxhist2 = 1, 1
io_form_auxhist2 = 5
fine_input_stream = 0, 2
adjust_output_times = T
debug_level = 0
/
&domains
time_step = 150
time_step_fract_num = 0
time_step_fract_den = 100
max_dom = 2
s_we = 1, 1
e_we = 160, 103
s_sn = 1, 1
e_sn = 115, 73
s_vert = 1, 1
e_vert = 45, 45
dx = 36448.6484, 12149.5498
dy = 34803.5547, 11601.1846
grid_id = 1, 2
parent_id = 1, 1
i_parent_start = 1, 73
j_parent_start = 1, 42
parent_grid_ratio = 1, 3
parent_time_step_ratio = 1, 3
feedback = 0
smooth_option = 1
numtiles = 1
nproc_x = -1
nproc_y = -1
num_metgrid_soil_levels = 4
num_metgrid_levels = 27
interp_type = 1
extrap_type = 1
t_extrap_type = 1
use_levels_below_ground = T
use_surface = T
/
&physics
mp_physics = 2, 2
cu_physics = 6, 6
cudt = 5, 5
sf_sfclay_physics = 1, 1
sf_surface_physics = 2, 2
num_soil_layers = 4
num_land_cat = 24
num_soil_cat = 16
bl_pbl_physics = 1, 1
bldt = 0, 0
ra_lw_physics = 4, 4
ra_sw_physics = 4, 4
radt = 30, 30
/
&dynamics
rk_ord = 3
w_damping = 1
diff_opt = 1
km_opt = 4
diff_6th_opt = 0
diff_6th_factor = 0.12
base_temp = 290.
damp_opt = 3
zdamp = 5000.
dampcoef = 0.2
khdif = 0
kvdif = 0
non_hydrostatic = T
moist_adv_opt = 1
scalar_adv_opt = 1
/
&bdy_control
spec_bdy_width = 5
spec_zone = 1
relax_zone = 4
specified = T, F
nested = F, T
/
&namelist_quilt
nio_tasks_per_group = 0
nio_groups = 1
/
Also, wrote wrfhelp, still waiting for reply.
Update: I also checked rsl_error.0000 outputs from real and from wrf, they are almost the same in v3.3 and v3.4, no significant differences between versions.
Surgeon: which compiler did you used?
Any further suggestion? Thx
Re: WRF-ARW 3.4 10m wind too strong
I used gfortran. Maybe error is in GrADS script?meteoadriatic wrote: Surgeon: which compiler did you used?
Any further suggestion? Thx
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Re: WRF-ARW 3.4 10m wind too strong
I used latest ifort (from parallel studio 2011). I'm now going to try compile with gfortran to exclude possible compiler issues.surgeon wrote:I used gfortran. Maybe error is in GrADS script?meteoadriatic wrote: Surgeon: which compiler did you used?
Any further suggestion? Thx
GrADS no.. i use simple d mag(ugrd10m,vgrd10m) to compare my test runs... no way GrADS is wrong here, and as you can see the wind is much slower near domain borders so GrADS is ok here.. and wrfpost I think should be OK.
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Re: WRF-ARW 3.4 10m wind too strong
Progress update:
compiled 3.4 with PGI evaluation version. Same 10m wind results like with Intel. So, compiler is OK, binaries are OK.
Continuing to search for cause of issue....
compiled 3.4 with PGI evaluation version. Same 10m wind results like with Intel. So, compiler is OK, binaries are OK.
Continuing to search for cause of issue....