Your observation is correct: "Grünland' is different from the '*general*'
GrowingDegreeDays:
wikipedia explains as per https://en.wikipedia.org/wiki/Growing_degree-day
With your observation if fact you open can of worms, because a large amount
of variations of GrowingDegree Days related to different animals, insects
and plants.
;-) Each country has it's variations as well .........
Op dinsdag 15 december 2020 om 17:13:50 UTC+1 schreef kk44...@gmail.com:
> I found the aggregation type "growing degree day" ("growdeg").
>
> There is a special version of that in Europe. In Germany it is called
> "Grünlandtemperatursumme". I found no translation to English. The word in
> the subject is translated word by word.
>
> It is based on the daily average temperature, as growing degree day is.
> The base temperature is 0 degrees centigrade (32 degrees Fahrenheit).
>
> - In January, all the values are multiplied by 0.5.
> - In February, all the values are multiplied by 0.75.
> - Form March on, the values are used as is.
>
> The sum is calculated from Jan. 1st to May 31st.
>
> The day, when the value exceeds 200 in spring (if calculated in
> centigrade), is considered the start of growing of the plants.
>
> Some german weather networks ask for those values (sum and date).
>
> It seems to me that the actual aggregation function does not cover that
> version.
>
>
>
>
--
You received this message because you are subscribed to the Google Groups
"weewx-user" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to weewx-user+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/weewx-user/09d811ed-e5fd-4843-969c-695c85edc579n%40googlegroups.com.
