urban

Hello everyone, I'm running some simulations with WRF version 4.5.1 coupled with sf_urban_physics = 2 and bl_pbl_physics = 8 for three one-way nested domains for a month. Initially, I defined the eta levels with auto_levels_opt = 2, dzbot = 35, dzstretch_s = 1.3, and dzstretch_u = 1.1. This way...

Hi all, I tried to run WRF-Chem with LCZ and urban canopy scheme, but it failed. The attachments are namelist.input, namelist.wps, and rsl.error.* files. Please note that: 1. I tried to run WRF-Chem with default land use and it was successful. 2. I tried to run WRF-Chem with LCZ land use...

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...

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...

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?

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...

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...

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...

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...

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...

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...

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...

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

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...

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...

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...

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...

Does anyone have a step by step guide on running WRF with the Urban model turned on? I will appreciate. Thanks

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...

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...