Help with Koppen Geiger calculation

[CatherineBuckland]

Hi pastclim team,
I am new to the pastclim package, and keen to try and use it to calculate palaeo Koppen Geiger classifications using the package and data from the CHELSA-TraCE21K data repository.

In the pastclim example, I see you use call in the data 'Temp', and 'Prec' as three dimentional arrays. I am interested in looking at particular periods, for example 5-4.5ka (as an example), is it simplest for me to produce new raster files for each monthly average, and then group them as a 12-layer raster stack, which I then call into the function. Would this work?
Also I know that the precip value refers to averange monthly precipitation, but what metric is Temp? Is it average monthly temp, min or max? I cannot see Mean Monthly Temp available on CHELSA-TraCE21K - only max and min.

Many thanks,

Catherine

[dramanica]

Yes, you can use the function on SpatRaster objects, so what you suggest should work.
For mean temperature, you can simply use (tmin+tmax)/2; that's what was used in the original publication to compute bio1, which is the mean annual temperature.