Search found 1464 matches

by Ming Chen
Tue Jun 22, 2021 5:24 am
Forum: wrf.exe
Topic: Zero values for RAINC and RAINNC
Replies: 4
Views: 15

Re: Zero values for RAINC and RAINNC

Hi, I looked at your namelist.input. I suppose this is pre-set moving nest case. Please let me know if I am wrong. I have a few concerns about this case: (1) Can you run the case with vortex-following moving nest? I ask this because it is hard to correctly specify options for pre-set moving nest (2)...
by Ming Chen
Tue Jun 22, 2021 5:12 am
Forum: wrf.exe
Topic: SST update with nested domains
Replies: 6
Views: 44

Re: SST update with nested domains

I believe this question has been answered.
by Ming Chen
Tue Jun 22, 2021 5:11 am
Forum: Meteorological Input Data
Topic: historical NCEP SST download
Replies: 2
Views: 12

Re: historical NCEP SST download

Hi Longfei, Please take a look at the NCAR CISL website here: https://rda.ucar.edu/datasets/ds277.7/index.html#!cgi-bin/datasets/getGladeList?dsnum=277.7&gindex=3 This is daily SST data that covers the period of your integration. Note that this data cannot represent any diurnal cycle and the resolut...
by Ming Chen
Mon Jun 21, 2021 8:53 pm
Forum: wrf.exe
Topic: NLCD40 WRF run crashes because of module_sf_noahdrv.f90 (unit = 19, file = 'VEGPARM.TBL')
Replies: 1
Views: 4

Re: NLCD40 WRF run crashes because of module_sf_noahdrv.f90 (unit = 19, file = 'VEGPARM.TBL')

Anamika,
Would you please run this case using WRFv4.2 and let me know whether it works?
I am trying to find a solution for this issue and hope to get back to you soon. Thanks for your patience.
by Ming Chen
Mon Jun 21, 2021 7:58 pm
Forum: wrf.exe
Topic: How to output time-step rain values?
Replies: 1
Views: 6

Re: How to output time-step rain values?

When you set output_diagnostics = 1, you will get the following variables in wrfxtrm files: t2min,t2max,tt2min,tt2max,t2mean,t2std,q2min,q2max,tq2min,tq2max,q2mean,q2std,skintempmin,skintempmax,tskintempmin,tskintempmax,skintempmean,skintempstd,u10max,v10max,spduv10max,tspduv10max,u10mean,v10mean,sp...
by Ming Chen
Mon Jun 21, 2021 6:08 pm
Forum: WRF Physics
Topic: The Lightning Flash count values (IC, CG) are always zero
Replies: 3
Views: 50

Re: The Lightning Flash count values (IC, CG) are always zero

I am not aware of other options ...
I have sent your question to the developer. I will keep you updated if I get any feedback.
by Ming Chen
Mon Jun 21, 2021 6:06 pm
Forum: WRF Physics
Topic: Rationale for setting up the WRF Tropical Physics Suite.
Replies: 1
Views: 10

Re: Rationale for setting up the WRF Tropical Physics Suite.

Would you please clarify what specific basis are you looking for?
by Ming Chen
Mon Jun 21, 2021 6:02 pm
Forum: wrf.exe
Topic: SST update with nested domains
Replies: 6
Views: 44

Re: SST update with nested domains

Hi, You only need to set sst_upadte =1 The key issue is that you need to have met_em files for all domains and over all the the integration period. Below is an example. Suppose you run a triply-nested cases over 48-hour period and the forcing data is at 6-hour interval. You need to have 9 met_em.d01...
by Ming Chen
Thu Jun 17, 2021 6:39 pm
Forum: wrf.exe
Topic: SST update with nested domains
Replies: 6
Views: 44

Re: SST update with nested domains

Thanks for the update. I actually run a test case and is able to produce wrflowinp files for all the nested domains. We need to have met-em files for all the domains and over the entire integration period.
by Ming Chen
Wed Jun 16, 2021 4:19 pm
Forum: WRF Physics
Topic: Double CO2 experiment?
Replies: 1
Views: 15

Re: Double CO2 experiment?

Hi,
To run the double CO2 experiment, you need to modify both the module_ra_rrtmg_sw.F and module_ra_rrtmg_lw.F. In these two codes, you will find the line below :

data co2 / 379.e-6 /

(line 10215 in module_ra_rrtmg_sw.F and line 11716 in module_ra_rrtmg_lw.F).
by Ming Chen
Mon Jun 14, 2021 11:14 pm
Forum: Special Running Options
Topic: wrfpress has null values at custom pressure levels
Replies: 4
Views: 87

Re: wrfpress has null values at custom pressure levels

Hi, When p_lev_diags is turned on, the following variables should be included in your wrfpress files: p_pl,u_pl,v_pl,t_pl,rh_pl,ght_pl,s_pl,td_pl,q_pl They are pressure level pressure, U, V, RH, GHT, Wind speed, Td, and water vapor mixing ratio. Please check whether all the above variables exist in ...
by Ming Chen
Mon Jun 14, 2021 10:34 pm
Forum: wrf.exe
Topic: GRID 4KM - AIR QUALITY
Replies: 2
Views: 17

Re: GRID 4KM - AIR QUALITY

Hi, Ikhsan, Please see my answers below: 1. Nested with the ratio of 3. and then run wrf.exe This is a good option. You may choose 12km-4km for the parent and child domain. 2. I'm only using the nested with ratio of 3 during WPS. After that, I copied that domain 3 only and changed to the parent doma...
by Ming Chen
Mon Jun 14, 2021 10:30 pm
Forum: wrf.exe
Topic: WRF crushes with ACM2 PBL scheme
Replies: 8
Views: 98

Re: WRF crushes with ACM2 PBL scheme

Hi, David, You are right that CANFRA and IMPERV are only available in nlcd2011_can_ll_9s and nlcd2011_imp_ll_9s static data. However, note that this doesn't affect the application of ACM scheme in other regions of the world. This is because if CANFRA and IMPERV are not available in areas outside CON...
by Ming Chen
Mon Jun 14, 2021 9:56 pm
Forum: wrf.exe
Topic: wrf.exe crushes
Replies: 1
Views: 22

Re: wrf.exe crushes

The error message doesn't give us helpful information.
Please recompile WRF in debug mode (i.e., ./clean -a and ./configure -d), then rerun this case. The debug option will show exactly where the model crashes. This will be helpful for us to trace the problems. Thanks.
by Ming Chen
Mon Jun 14, 2021 9:53 pm
Forum: real.exe
Topic: Key error when running real.exe and wrf.exe
Replies: 2
Views: 14

Re: Key error when running real.exe and wrf.exe

Mani,
I am pretty sure this is an issue related to specific environment settings of your machine. Please talk to your computer manage and figure out what is wrong.
by Ming Chen
Mon Jun 14, 2021 9:51 pm
Forum: real.exe
Topic: error while running real.exe
Replies: 1
Views: 19

Re: error while running real.exe

The first thing to check is to look at your working directory, and make sure that met_em.d01.2021-02-18_00:00:00.nc does exist there. if it is not there, please link this file to your working directory, then try again. If you do have this file and real.exe still failed, please send me your namelist....
by Ming Chen
Mon Jun 14, 2021 9:28 pm
Forum: WRF Physics
Topic: WRF v4.1.2 Thompson Aerosol-Aware scheme QNWFA2D
Replies: 6
Views: 387

Re: WRF v4.1.2 Thompson Aerosol-Aware scheme QNWFA2D

Hi Stefan,
I am sorry that there is no fix for this issue yet.
by Ming Chen
Mon Jun 14, 2021 9:27 pm
Forum: WRF Physics
Topic: modify module_mp_lin.F
Replies: 1
Views: 19

Re: modify module_mp_lin.F

Hi Maosier. I take a quick look at the code phys/module_mp_lin.F. QNDROPZ is a local variable that is updated in the subroutine "clphy1d". Therefore, even if you specify constant value to this variable at the right beginning of the subroutine "lin_et_al", it will be changed later once "clphy1d" is c...
by Ming Chen
Mon Jun 14, 2021 9:19 pm
Forum: WRF Physics
Topic: The Lightning Flash count values (IC, CG) are always zero
Replies: 3
Views: 50

Re: The Lightning Flash count values (IC, CG) are always zero

SRINIVAS, I looked at your namelist.input and all look fine except a few options below: cellcount_method = 1 , which is better for large domain iccg_method = 2, which avoids possible issue related to unreasonable iccg_prescribed_num and iccg_prescribed_den Please try and see whether you can get IC a...
by Ming Chen
Mon Jun 14, 2021 9:00 pm
Forum: WRF Physics
Topic: Problem in wrfout with thompson=28
Replies: 2
Views: 47

Re: Problem in wrfout with thompson=28

Would you please send me your panelist.wps and namelist.input to take a look? Thanks.
by Ming Chen
Mon Jun 07, 2021 8:05 pm
Forum: real.exe
Topic: real (and wrf) "crashing" if more than 4 cores used (Intel compiler, dmpar)
Replies: 2
Views: 35

Re: real (and wrf) "crashing" if more than 4 cores used (Intel compiler, dmpar)

Hi, I am suspicious this is a machine issue. I talked to our software engineer and we believe this might be a 'trick' related to AMD processor. Unfortunately we cannot provide a solution since we cannot repeat this problem. Please keep us updated if you eventually know for sure what is going on. Som...
by Ming Chen
Mon Jun 07, 2021 6:07 pm
Forum: wrf.exe
Topic: WRF crushes with ACM2 PBL scheme
Replies: 8
Views: 98

Re: WRF crushes with ACM2 PBL scheme

Hi, David, There arte two issues I am concerned: (1) The ACM PBL scheme is recommended to pair with ACM land surface and surface layer schemes, that is, sf_sfclay_physics = 7, 7, 7, sf_surface_physics = 7, 7, 7, bl_pbl_physics = 7, 7, 7, Please try the above options with just a single-domain run, an...
by Ming Chen
Tue Jun 01, 2021 5:39 pm
Forum: Idealized Cases
Topic: Equation of potential temperature
Replies: 1
Views: 195

Re: Equation of potential temperature

Hi,
F_THETA is a symbol which is used to represent forcing terms arising from model physics and turbulent mixing. It involves cumulus, microphysics, radiation, boundary layer, etc., and detailed calculation of this term depends on various schemes you choose for your case.
by Ming Chen
Tue Jun 01, 2021 5:29 pm
Forum: Meteorological Input Data
Topic: Transfer CAM/CESM to WPS input
Replies: 5
Views: 181

Re: Transfer CAM/CESM to WPS input

Thanks for the update.
by Ming Chen
Tue Jun 01, 2021 5:28 pm
Forum: real.exe
Topic: WRF Error: In source file module_date_time.f90, at line number 777
Replies: 4
Views: 162

Re: WRF Error: In source file module_date_time.f90, at line number 777

Thanks for the update, which saves me time to further explore what is wrong.

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