These variables are aggregates per stand. Typically, they are accessed via `stand.<varname>`.
|basalArea||total basal area (m2/ha)|
|age||basal area weighted mean age of the stand|
|absoluteAge||number of years since the beginning of the rotation (not based on tree age)|
|nspecies||number of species (>4m)|
|volume||total standing volume (m³/ha)|
|dbh||basal area weighted mean dbh (trees taller 4m) in cm|
|height||basal area weighted mean height (trees >4m) in m|
|annualIncrement||mean annual increment (MAI), m3 timber/ha for the full rotation period|
|elapsed||years since last execution of an activity for the stand (yrs)|
|topHeight||mean height of the thickest 100 trees/ha (m)|
|area||stand area (ha)|
|year||current simulation year|
Site variables such as "annualIncrement" or "harvestMode" are not implemented yet.