Problem with calculating the Physiological Equivalent Temperatur (PET) in SOLWEIG

[danelzw]

I have a question about calculating the physiologically equivalent temperature (PET) in SOLWEIG. I have defined different POIs for my study area. At first I wondered why the PET in the Output folder is identical for each POI (despite different mean radiation temperature). Then i noticed that the PET is the same as the air temperature initially entered via the meteorological dataset. So if i understand correctly, no PET is recalculated. Does anyone have any idea what this could be due to? Or have I made a mistake?

Kind regards and thanks in advance!

[biglimp]

Hm, this might be a bug. If so, we can move this thread over to issues but first, can you please attach your input data (DSMs, SVFs, metdata, POIs and RunInfo from your previous run).

[danelzw]

Oh, that really can be the case! I also did not use any wind data because in the tutorial its said that one only have to use temp, rh and radiation (see picture) but I guess it is only for the TMRT calculation. I will try it again with the wind speed data, thank you for your help!

[biglimp]

Great. I will also change in the tutorial regarding the use of POIs.

[danelzw]

It worked, I get different PET for each POI! Thank you again.
But I cannot "prepare existing data" with windspeed of 0 m/s. Can you explain why this is the case?
Kind Regards,
Dana

[biglimp]

Yes. We have models in UMEP that is failing if ws=0. Set to e.g. 0.01 if you have no wind. However, ws of 0 m/s is not probable in outdoor environmnets.

[danelzw]

Ok, great! Thank you :)