site - intermediate hardwood (IHW), intermediate red pine (IRP), mature hardwood (MHW), mature red pine (MRP), pine barrens #2 (PB). NB! the latter is not the same site as in 2002.
date -  date=1 on Jan. 1, 1900
time - 0-1, fractional
datetime = date+time
year
day - day of year
hour
ts10 - in C
ts30
empty variable
ta - in C
rh - in %
m10 - matric water potential, in Bars
hft1 - soil heat flux #1, in W m-2
hft2
hft3
m30