Request for Guidance on Implementing WUDAPT LCZ Data in WRF v4.7.0

[Deepu2006]

Hello everyone,

I’m currently running a WRF simulation (v4.7.0) and attempting to use urban parameter data from URBPARM_LCZ.TBL & Using the WUDAPT to WRF tool to convert geo_em.d0 files. However, I’ve encountered the following issue:
Using URBPARM_LCZ.TBL with old 3 urban classes. Set use_wudapt_lcz=0

From what I understand, URBPARM_LCZ.TBL is designed for use with the WUDAPT LCZ scheme, which defines 10+ urban categories. However, in my setup, I’m still using the default 3-category urban classification, and I have use_wudapt_lcz=1 in my namelist.
Here i have attached my rsl.error0000 & namelist.input

 

[Ming Chen]

Please up;load your namelist.wps for me to take a look. Thanks.

 

[Deepu2006]

Thanks for your reply Ming chen, Here I am attaching my namelist.wps

 

[Deepu2006]

Here I am also attaching my tiff file which i have used for geogrid conversion

 

[Ming Chen]

Please up;load your namelist.wps for me to take a look. Thanks.

Thank you for uploading namelist.wps. In this file, you set

 geog_data_res = 'usgs_lakes+30s', 'usgs_lakes+30s', 'usgs_lakes+30s',

With this option, you don't really use LCZ data for your case. This explains why you get the error message: Using URBPARM_LCZ.TBL with old 3 urban classes. Set use_wudapt_lcz=0
Please change the option to:

geog_data_res = 'lcz_new+default','lcz_new+default', 'lcz_new+default',

Then try again.

let me know if you still have issues for this case.

 

[Deepu2006]

Thanks for your reply Ming chen, I am facing the same issue with this geog_data_res='lcz_new+default','lcz_new+default', 'lcz_new+default',
Here I am attaching my rsl.error file

 

[Ming Chen]

Can you upload a singel met_em file for me to take a look?

 

[Deepu2006]

Here i have attached my met_em.d0 files, please take a look

 

[Ming Chen]

I just realized that you run with WPSV4.6.0. Please follow the steps below:

(1) set geog_data_res = 'cglc_modis_lcz+default','cglc_modis_lcz+default','cglc_modis_lcz+default'
(2) in WPS/geogrid, remove the default GEOGRID.TBL, then issue the command:
ln -sf GEOGRID.TBL.ARW_LCZ GEOGRID.TBL

and rerun geogrid.exe and metgrid.exe.

Let me know if you still have issues.

 

[Deepu2006]

Thanks for your answer, But I want to use WUDAPT LCZ generated data from this wudapt lcz to convert the geo_em.d03.nc with wudapt2wrf tool not modis global lcz data

 

[Ming Chen]

I suppose that cglc_modis_lcz data is derived from wudapt lcz.

Is there any special raeson you want to use wudapt lcz ?

 

[Deepu2006]

Yes the cglc_modis_lcz data is derived from wudapt lcz but there are many more data of a particular cities, or cities with rapid urban growth, default land use datasets often underestimate urban extent or structure. WUDAPT provides more accurate urban morphology inputs.
That's why I want to use the data of a particular city, Please Let me know is there any other method in wrf to run with that wudapt data

 

[Ming Chen]

I will talk to our expert and hopefully he can get back to you ...

 

[cenlinhe]

you can use the aforementioned way to generate the LCZ version of geo_em* file and then use your WUDAPT tool to replace the URBPARM variables in the geo_em file accordingly. If you want to use the default 3-category urban classification, you can remap the classification number 31-33 to 51-53 (ensure the correct mapping based on their classification description) according and replace the land type map by this change in your geo_em* file.