Temporal distribution of anthropogenic heat emissions (AHE)

[ZHOU Wan]

Dear WRF Support Team,
I have a question regarding the temporal distribution of anthropogenic heat emissions (AHE) when using gridded AHE input from WPS versus AHE data specified in URBPARM.TBL. Specifically, do both methods adopt the same diurnal profile for AHE distribution?

In the module_sf_urban.F file within wrf/phys, the following code handles AHE:

! Miao, 2007/01/17, cal. ah
if(ahoption==1) AH=AH*ahdiuprf(tloc)

! Yang, 2014/10/08, cal. alh
Kalh=0
if(alhoption==1) THEN
if(jmonth==3 .or. jmonth==4 .or. jmonth==5) Kalh=1
if(jmonth==6 .or. jmonth==7 .or. jmonth==8) Kalh=2
if(jmonth==9 .or. jmonth==10.or. jmonth==11) Kalh=3
if(jmonth==12.or. jmonth==1 .or. jmonth==2) Kalh=4
endif
if(alhoption==1) ALH = ALH*alhdiuprf(tloc2)*alhseason(Kalh)

From my understanding, when both gridded AHE data from WPS and URBPARM.TBL-based AHE data are used simultaneously, the AHE treatment differs in the model. Based on previous discussions, it seems that

• The AHE from distributed_ahe_opt (gridded AHE input via WPS) is directly added to the temperature tendency or surface sensible heat flux after the land and urban model processes are completed.
• The AHE specified in URBPARM.TBL is incorporated within the urban scheme and affects the urban flux calculations directly.

Could you confirm whether both methods follow the same diurnal profile (ahdiuprf(tloc)) for hourly-scale distribution? Additionally, how does the model handle potential conflicts when both sources of AHE are provided simultaneously?
Thank you for your time!