site: Black Hills vegetation: Ponderosa Pine Latitude:44.15438 Longitude:103.6428 Leaf Area Index (aveage): 2.0 Average Canopy Height: 13 - 15 m average DBH: 8 -10 inches flux system height (24 m) Data are "hour" ending and all data are Mountain Standard Time. Following is a list and units of data contained in the BH01_XXX.DAT files where XXX is the calender day of year. Column variable units 1 decimal day - 2 calender day - 3 hour - 4 wind speed m/s 5 wind direction degrees 6 air temperature degrees C 7 relative humidity % 8 pressure mb 9 incoming PAR uE/m2/s 10 outgoing PAR uE/m2/s 11 incoming global W/m2 12 outgoing global W/m2 13 incoming longwave W/m2 14 outgoing longwave W/m2 15 net radiation W/m2 16 ground heat flux W/m2 17 wetness - 18 precip inches 19 surface temperature degrees C 20 soil temp (2 cm) degrees C 21 soil temp (4 cm) degrees C 22 soil temp (8 cm) degrees C 23 soil temp (16 cm) degrees C 24 soil temp (32 cm) degrees C 25 soil temp (64 cm) degrees C 26 u_bar (sonic) m/s 27 momentum flux (u'w') m2/s2 28 u'2 m2/s2 29 v'2 m2/s2 30 w'2 m2/s2 31 sensible heat flux W/m2 32 latent heat flux W/m2 33 CO2 flux mg CO2/m2/s 34 soil moisture (10 cm) volumetric water content 35 soil moisture (10 cm) volumetric water content 36 soil moisture (30 cm) volumetric water content 37 soil moisture (30 cm) volumetric water content 38 tree bole temperature degree C 39 tree bole temperature degree C 40 tree bole temperature degree C 41 tree bole temperature degree C 42 net radiation floor W/m2