Add single anthropogenic heat data

[Miao_Yang]

Hello, professors and seniors in the community.
I would like to inquire whether it is possible to add only one anthropogenic heat grid data, such as the annual average, to the UCM model and then use the 24-hour distribution of anthropogenic heat in the URBPARAM.TBL to calculate?
I see that the code currently requires spatially hourly monthly varying anthropogenic heat data.
Looking forward to your reply as soon as possible.

 

[Miao_Yang]

Also, I noticed that in the official slucm dataset, there are two paths corresponding to rel_path, which are 'y2010_ahe' and 'y2050_ahe'.
My understanding is that the data from the two years 2010 and 2050 are interpolated to get the target years.
May I ask how this should be used in namelist.wps? Should I write 'geog_data_res = ‘y2010_ahe+y2050_ahe+default’,'?

 

[Ming Chen]

I am no sure of these questions. I will ask our expert to take a look...

 

[ZHOU Wan]

Also, I noticed that in the official slucm dataset, there are two paths corresponding to rel_path, which are 'y2010_ahe' and 'y2050_ahe'.
My understanding is that the data from the two years 2010 and 2050 are interpolated to get the target years.
May I ask how this should be used in namelist.wps? Should I write 'geog_data_res = ‘y2010_ahe+y2050_ahe+default’,'?

Yes, I think you can write 'geog_data_res = ‘y2010_ahe+y2050_ahe+default’ to use the AHE field in the official slucm dataset. I have tried this, and it works. Here is the AHE distribution in my study area.

 

[cenlinhe]

The spatial varying AHE dataset will only be used when distributed_ahe_opt > 0 set in the namelist.input, and only works with urban_physics=1.
If you do not activate distributed_ahe_opt, the default SLUCM uses the URBPARM.TBL parameters with a 24-hour diurnal cycled AHE with a peak value: WRF/run/URBPARM.TBL at master · wrf-model/WRF
You could replace the peak AHE (WRF/run/URBPARM.TBL at master · wrf-model/WRF) with your prescribed values and modify the multiplier for diurnal cycle profile in the URBPARM.TBL.

 

[ZHOU Wan]

The spatial varying AHE dataset will only be used when distributed_ahe_opt > 0 set in the namelist.input, and only works with urban_physics=1.
If you do not activate distributed_ahe_opt, the default SLUCM uses the URBPARM.TBL parameters with a 24-hour diurnal cycled AHE with a peak value: WRF/run/URBPARM.TBL at master · wrf-model/WRF
You could replace the peak AHE (WRF/run/URBPARM.TBL at master · wrf-model/WRF) with your prescribed values and modify the multiplier for diurnal cycle profile in the URBPARM.TBL.

Hi, I am working with WRF-SLUCM (sf_urban_physics = 1) and would like to clarify the treatment of anthropogenic heat emissions (AHE) in the model. Specifically, I have the following questions:

1. Disabling AHE in WRF-SLUCM​

From your comments, I understand that when distributed_ahe_opt = 0, the default SLUCM still applies AHE based on URBPARM.TBL, which includes a 24-hour diurnal cycle with a peak value.

• Is there a way to completely disable AHE in WRF-SLUCM, ensuring that no anthropogenic heat is considered in the simulation?
• If so, do I need to modify URBPARM.TBL manually (e.g., setting AHE values to zero), or is there a model configuration that disables AHE entirely?

2. Combining Grid-Based AHE Input with URBPARM.TBL AHE​

In my study, I have a grid-based AHE dataset that represents vehicular heat emissions (VHE), which I provide as an additional input in wrfinput using distributed_ahe_opt = 1 or 2. However, I also want to use the predefined AHE values from URBPARM.TBL to account for other anthropogenic heat sources (e.g., building emissions).

• When distributed_ahe_opt = 1 or 2 is set, does WRF override the AHE values from URBPARM.TBL, or does it add both sources of AHE together?
• Is there a way to configure WRF such that grid-based AHE is used for vehicle emissions, while URBPARM.TBL is used for other heat sources like buildings?
• How can I confirm in the output whether both sources of AHE are being applied correctly?

I appreciate any insights or recommendations on how to properly configure WRF-SLUCM to handle AHE in these scenarios.