Carbon Cycle Group NOAA/ESRL/GMD Tower Program data file formats for station WKT. Contact: Arlyn Andrews NOAA ESRL R/GMD1 325 Broadway Boulder, CO 80305 Arlyn.Andrews@noaa.gov 303-497-6773 (tel) 303-497-6290 (fax) Tower location: 30 km South of Waco, TX, USA 31deg 18' 52" N latitude 97deg 19' 37" W longitude tower base altitude = 251 m above sea level local standard time (CST) = GMT - 6 hours References: Bakwin, P.S., C. Zhao, W. Ussler, III, P.P. Tans, and E. Quesnell, Measurements of carbon dioxide on a very tall tower, Tellus, 47B, 535-549, 1995. Bakwin, P.S., P.P. Tans, D.F. Hurst, and C. Zhao, Measurements of carbon dioxide on very tall towers: Results of the NOAA/CMDL program, Tellus, 50B, 401-415, 1998. ******************** wkt2003.hr.all ******************** Each record (row) is a 1 hour average of all data. The time is for the start of that period. There are 31 entries in each record, as below. Col Data Units No data --- -------------------- ------------ -------- 1 Year GMT 2 Month GMT 3 Day GMT 4 Hour GMT 5 CO2, 9 m ppm -999.9 6 CO2, 30 m ppm -999.9 7 CO2, 61 m ppm -999.9 8 CO2, 122 m ppm -999.9 9 CO2, 244 m ppm -999.9 10 CO2, 457 m ppm -999.9 11 CO, 30 m ppm -999.9 12 CO, 457 m ppm -999.9 13 Wind Speed, 30 m m/s -99.9 14 Wind Speed, 457 m m/s -99.9 15 Wind Direction, 30 m degrees True -999 16 Wind Direction, 457 m degrees True -999 17 Temperature, 30 m degrees C -99.9 18 Temperature, 457 m degrees C -99.9 19 RH, 30 m % -99.9 20 RH, 457 m % -99.9 21 Surface Pressure mB -9999.9 22 PAR microE/m2/s -9999 23 Rainfall 0.01 inches -999 Notes: This file last updated: January 24, 2007