Audubon Research Ranch (Arizona) Flux Data CONTACT: Tilden Meyers NOAA/ATDD P.O. Box 2456 Oak Ridge, TN 37830 PH:865-576-1245 meyers@atdd.noaa.gov SITE INFORMATION: Site: Audubon Research Ranch, Arizona vegetation: grasslands Latitude:31.59073 Longitude:110.51038 leaf area index: estimated to be 1.0 (grassland fire in April of 2002) canopy height: 10 - 20 cm flux system measurement height: 4 m DATA FILE INFORMATION: Following is a list and units of data contained in the AGYY_XXX.DAT files where YY is the two digit year (e.g. 02 = 2002) and 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 (Rg_in-Rg_out+Lw_in-Lw_out) 16 ground heat flux W/m2 17 wetness - 18 precip mm 19 surface temperature degrees C (IRT) 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 soil temp (128 cm) degrees C 27 u_bar (sonic) m/s 28 momentum flux (u'w') m2/s2 29 u'2 m2/s2 30 v'2 m2/s2 31 w'2 m2/s2 32 sensible heat flux W/m2 33 latent heat flux W/m2 34 CO2 flux mg CO2/m2/s 35 soil moisture (10 cm) volumetric water content 36 soil moisture (20 cm) volumetric water content 37 soil moisture (30 cm) volumetric water content 38 soil moisture (40 cm) volumetric water content 39 soil moisture (60 cm) volumetric water content 40 soil moisture (100 cm) volumetric water content FIELD NOTES: 2002 After day 168, incoming Par was estimated from relationship with incoming global. Par_in = 9.74 * 2.0361*Rg_in 2002 On Day 304, computer died, probably due to dust. 2002 Day 358, animal chewed through soil moisture cable. Data out till ???.