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  1. D

    Green roof soil moisture

    Dear WRF community, I have a question about soil moisture in the green roof option. I would highly appreciate it if someone could help me. For single layer UCM (SLUCM), how can I change the initial soil moisture of green roofs? While green roof properties for SLUCM are specified in...
  2. N

    Daytime temperatures in Clay in Soil texture

    I am currently studying the heat island of Bangkok, Thailand as part of a Southeast Asian urban climate research. This study uses WRF versions 4.2.2 and 4.3.3. Also, Noah LSM and Single layer UCM are used. I have run simulations on many cases, but the simulations do not reproduce the daytime...
  3. S

    TC_URB vs T_2m

    Hi, I have run WRF with the SLUCM and I am just interested in understanding the variable urban canopy Temperature (TC_URB)? and whether the 2m temperature is calculated the same way as without the urban canopy model?
  4. W

    [SOLVED] Segfault for WRF V4.5 with the new hybrid 100-m MODIS-LCZ dataset using SLUCM urban physics

    Hi, I came across segfault for WRF 4.5 using the new modis-lcz dataset under SLUCM urban physics. The segfault always happen at 1 of the 72 cores in Cheyenne. From the error log it seems that the segfault happens during avgflx at solve_em.F. I cannot pinpoint how it happens without any...
  5. Z

    Can we use urban 3D data in WRF

    Hi, everyone. Recently I have a question. That is, if I have a gridded dataset of urban building height. How can I use it when I run a WRF simulation? As I know, we re allowed to replace the land use and land cover (LULC) data. Is there a similar way to deal with urban 3D data? Now only...
  6. Y

    Where can I find "Urbanized-WRF" or "WRF-Urban"?

    Hello all, My name is Young. I'm a grad student who just started learning WRF. My goal is to analyze Urban Heat Island effect with WRF, and I recently installed WRF-ARW 4.5 in my Linux successfully i. I'm still figuring out the next step- preparing an LCZ map of my ROI and others that is...
  7. G

    [SOLVED] Running WRF V-4.5 with the new hybrid 100-m global land cover dataset with Local Climate Zones and MLUCM BEP

    Hello. I'm trying to run the latest version of the WRF model by implementing the hybrid 100-m global land cover coupled with the BEP urban parameterization. I have 3 nested domains with 12 km, 4km, and 1km horizontal resolution, respectively. Unfortunately, during the simulation of the first...
  8. T

    (RESOLVED) WRF Single-layer, UCM crashed

    I ran a case in WRFv4.4.2, which was a 15 km run using Noah-MP land surface model. Simulation for SF_URBAN_PHYSICS = 1, Single-layer UCM in the Southeast United States. Simulation started from 2015-08-02 00Z and plan to end at 2015-08-10 00Z The run crashed at 2015-08-03_14:30:00Z due to NaN...
  9. H

    Error when using LCZ in WRFV4.5

    Hi all, Im trying to use the WUDAPT LCZ to upgrade the urban landuse in WRFV4.5. According to the recent update log, the lu_index from 31-41 is changed to 51-61. So I used w2w to generate the LCZ geo files and then modified the lLU_INDEX in the geo_em.d0*. The metgrid.exe and real.exe is...
  10. S

    Is it possible to set green roofs for specific areas in the WRF-urban?

    Dear WRF team, I am using WRF to simulate the cooling effect of green roofs in the city, but I found that I can only set the same green roof coverage for a certain category of LCZ separately in URBPARM_LCZ.TBL. This does not meet my needs because the green roof coverage may also be different...
  11. M

    module_sf_urban_Physics: WRF_URBAN

    Hello everyone, My simulation would run successfully without the Urban turned on, but when I turn on the Urban using BEP_BEM, it wont run and I get this error: At line 2372 of file module_sf_urban.f90 Fortran runtime error: Bad real number in item 1 of list input
  12. J

    forrtl: severe (24): end-of-file during read, unit 29, file ..../wrf-v4.0/test/r_11/LANDUSE.TBL

    Hi, dear administer. My WRF version is 4.0. My outermost domain is Shanxi, China and running time is 12 hours. I failed to run wrf.exe when submitting to compute node. The rsl file shows the following error and cannot run after modifying sf_urban. How can I solve this problem? Looking forward to...
  13. W

    WRF Restart Runs Fail When Mosaic Land Use Tiling Is On

    Hello, I am attempting to run nested (9km x 3km x 1km) urban simulations with the use of the mosaic landuse categories option. The simulation is stable and the output is realistic when I initialize and integrate the model forward in time. However, whenever my compute limit is reached and I...
  14. W

    how to output energy consumption and carbon emissions from BEM

    I understand that it is possible to output carbon emissions, energy consumption (including electricity, gas, water, etc.) from the WRF BEM result, like set up the parameters of bldg_physics, but I cannot set the output parameters in namelist.input and correctly run real.exe. Is it because using...
  15. S

    Urban canopy options

    Hello, I run simulations to identify urban effects on cyclone precipitation. I'm working with ERA-5 input data and NLCD 2011 LULC data. My question is, if I keep the urban canopy option turned off (sf_urban_physics = 0), is it considering that there is no urban area and thus excluding the urban...
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    Does anyone have a step by step guide on running WRF with the Urban model turned on? I will appreciate. Thanks
  17. A

    wrf.exe error:forrtl: severe (174): SIGSEGV, segmentation fault occurrederror

    Hi, dear administer. My WRF version is 4.4.1. My outermost domain is east China and running time is three months. Amounts of processors for running is 48 (I think it may be enough). At first, I follow the rule to set time_step=54 (6 x dx ,my dx is 9000). However, CFL error happened after 1 hour...
  18. G

    Default parameters for additional urban classes used in UCMs

    Hello! We are doing some work with the WRF urban canopy models and are currently post-processing the simulation files for analysis. Our simulations make use of the default modis_landuse_30s_with_lakes land cover as well as an updated and reclassified land cover for 2018 that includes the low...
  19. M

    Urban scheme in nest domain affecting mother domain

    Dear WRF community, I am using WRF4.4 and is testing with the urban options. I have two domains and intend to use urban only for the nested domain. My made three tests: For test1: sf_urban_physics = 0, 0, For test2: sf_urban_physics = 0, 1, For...
  20. R

    Issues with urban building variables

    I have two problems that I can't seem to figure out (using BEP and BEP+BEM). First, I want to add building data into the wrfinput file overwriting the data taken from the land use index (I am using NLCD). However, I can't get all the variables I need to overwrite to output in that file or the...