GCIP LSA-NW EAOP 1999 Colorado Agricultural Meteorological Network (COAGMET) Hourly Surface Data 1.0 General Description The Colorado Agricultural Meteorological Network (COAGMET) Hourly Surface Data is one of several surface datasets provided in the GEWEX Continental-Scale International Project (GCIP) Large Scale Area-North West (LSA-NW) Enhanced Annual Observing Period (EAOP) 1999. This dataset contains data for the GCIP LSA-NW EAOP-99 domain and time period (01 April 1999 through 31 March 2000). The GCIP LSA-NW EAOP-99 domain is approximately 90W to 115W longitude and 36N to 51N latitude. These data are provided as-is. These data were not quality controlled by the Unversity Corporation for Atmospheric Research/Joint Office for Science Support (UCAR/JOSS). 2.0 Detailed Data Description The Colorado Agricultural Meteorological Network (COAGMET) consists of 32 automated weather stations in Colorado operated by the Colorado Climate Center. For more information on COAGMET visit the following website: http://ccc.atmos.colostate.edu/~coag/ Below is the description of a typical COAGMET station. Most stations have a similar configuration but sensors, dataloggers and siting vary somewhat throughout the network. This dataset is also available on codiac in JOSS quality control (QC) format as the dataset "GCIP/LSA-NW 99 Surface: COAGMET Hourly Surface Data in QC format". Temperature, wind speed and wind direction values are averaged over the hour ending with the measurement time. Temperature and Relative Humidity * Model: Vaisala HMP35C Probe * Sensor Height: 1.5 meters * Temperature Specs o Temperature Measurement Range: -35 to 50 DegC o Thermistor Interchangeability Error: Typically <+-0.2 DegC over 0 DegC to 60 DegC; +-0.4 DegC at -35 DegC o Polynomial Linearization Error: <+-0.5 DegC over -35 DegC to 50 DegC * Relative Humidity Specs o RH Measurement Range: 0% to 100% o RH Accuracy (at 20 DegC) +- 2%, 0% - 90%; +-3% >90% o Temperature Dependence of RH Measurement: +-0.04% RH/DegC Wind * Model: R.M. Young 05103 Wind Monitor * Sensor Height: 2 meters * Wind Speed Specs o Range: 0-60 m/s o Starting Threshold: 1.0 m/s o Distance Constant (63% recovery): 2.7 m. * Wind Direction Specs o Range: 0-360 Deg. (355-360 open) o Starting Threshold 10 deg displacement: 0.9 m/s o Starting Threshold 5 deg displacement: 1.3 m/s Precipitation * Model: TE525 tipping bucket raingage * Specs o Sensor height >1m o Collector diameter - 154mm o 0.254mm/tip o accuracy +- 1% for precip of 50mm/hr or less o Operating temperature 0 to 50C (not accurate during winter) Solar Radiation * Model: Licor 200S Pyranometer * Specs o Sensor Height ~2m o 0-10 mv output range o Sensitivity typically 80 microamp/1000 W/m2 o Linearity Maximum deviation 1% up to 3000 W/m2 o Spectral response from 0.4 to 1.1 mu o Typical error under natural daylight +-3%, maximum +-5% Soil Temperature * Model: CSI Model 107 Soil Temp Probe (thermistor) * Specs o +- 0.4C for -33 to +48C all errors inclusive o Sensor depth 50mm and 150mm where two sensors used, 100mm where only one. Leaf Wetness Sensor * Model: CSI Model 237 - Circuit board with interlocking gold plated copper fingers, coated with flat latex paint to spread water layer. Measures electrical resistivity of water film. * Specs o Sensor height ~0.5m Data Logger * Model: Campbell Scientific CR10 * A picture of a CR10 installation can be found at: http://ccc.atmos.colostate.edu/~coag/ws01.gif Site Pictures * Dove Creek (dvc01) - http://ccc.atmos.colostate.edu/~coag/ws01.gif * Burlington (brl02) - http://ccc.atmos.colostate.edu/~coag/ws02.gif * Grand Junction (gjc01) - http://ccc.atmos.colostate.edu/~coag/ws03.gif 2.1 Detailed Format Description The GCIP LSA-NW EAOP-99 COAGMET Hourly Surface Data in original COAGMET format contains a single header record followed by hourly data records. 2.1.1 CoAgMet Header Data Format Each year of raw data begins with a header record. The data are formatted as comma delimited ASCII. Each record contains these fields: Field Description ----- ----------- 1 Year 2 Station ID 3 Latitude, degrees N 4 Longitude, degrees W 5 Elevation in feet 6 Station name 7 Location 8 Anemometer height (ft) 9 Temperature sensor height (ft) 10 Data format (csv for comma delimited; akr for Akr02 format) The Perl code = ($sta,$lat,$lon,$elev,$name,$loc,$anemh,$temph,$fmt) = split (",", $_); Here's all of them: #StaID,Lat.,Lon,Elev,Name/Location,,Anemh,Temph,Fmt AKR02,40.1552,103.1418,4550e,Akron USDA GPRC, ,,,akr ALT01,40.5717,104.7323,4910,Ault Station,1 mi SE of Ault,,,csv AVN01,38.2500,104.3667,4580,Avondale,1 mi SE of Avondale,,,csv BLA01,37.6239,105.5569,7760,Blanca,8 mi. SW of Blanca,,,csv BRL01,39.4998,102.0735,3900e,Burlington North,18 mi NNE of Burlington,,,csv BRL02,39.2652,102.1095,4170,Burlington No. 2,6 mi SE Burlington,,,csv CTR01,37.7067,106.1446,7702,Center,CSU San Luis Valley Res Ctr,,,csv CTZ01,37.2250,108.6720,6030,Cortez,9 mi SW Cortez,,,csv DLT01,38.7350,108.1173,5010,Delta,3 mi W of Delta,,,csv DVC01,37.7265,108.9541,6590,Dove Creek,4 mi NW of Dove Creek,,,csv #FRT01,39.1667,108.7500,4500,CSU Fruita Expt ,2 mi ENE of Fruita,,,csv FRT02,39.1803,108.6991,4519,CSU Fruita Expt,2 mi ENE of Fruita,,,csv FTC01,40.5947,105.1375,5120,Fort Collins AERC,4 mi NW of Fort Collins,,,csv FTC03,40.6523,104.9962,5110,Fort Collins ARDEC,6mi NE of Fort Collins,,,csv FTL01,40.0007,104.8492,5055,Fort Lupton,6 mi SSW ofLupton,,,csv FTM01,40.2585,103.9542,4320e,Fort Morgan,,,,csv GJC01,39.1738,108.6313,4869,Grand Junction,3 mi NW of Grand Jct,,,csv GLY03,40.4393,104.6472,4680,Greeley,2.5 mi NE of Greeley,,,csv #HXT01,40.6722,102.6467,4040,Haxton,2.5 mi NW of Haxtun,,,??? HYK02,40.4913,102.0893,3735,Holyoke,12 mi SE Holyoke,,,csv IDL01,39.7312,102.0893,3975,Idalia,2 mi N of Idalia,,,csv KRK01,,,,Kirk,,,,csv KSY01,40.3773,104.5317,4625,Kersey,2 mi SE of Kersey,,,csv LAM01,,,,Lamar,,,,csv LCN01,40.4753,104.7075,4750,Lucerne,1/4 mi SW of Lucerne,,,csv OTH01,38.6333,108.0500,5324,Olathe,3 mi NE of Olathe,,,csv #PBL01,38.2317,104.4667,4700e,Pueblo,Pueblo,,,csv PKH01,40.3128,104.7270,4710,Peckham,3.5 mi ENE of Peckham,,,csv RFD01,38.0333,103.7000,4180,CSU Rocky Ford Expt,2.5mi SE of Rocky Ford,,,csv VLD01,38.2317,104.4667,4700,Vineland,,,,csv WRY01,,,,Wray,,,,csv YJK01,37.3943,108.7388,6840,Yellow Jacket,2.5 mi NW of Yellow Jacket,,,csv #YUM01,40.1035,102.6057,4000,Yuma,6 mi E of Yuma,,,csv YUM02,40.1500,102.7240,4000e,Yuma #2,,,,csv (#'s denote defunct stations) 2.1.2 CoAgMet Hourly Data Format The data are formatted as comma delimited ASCII. Each record contains these fields: Field Description ------ ------------ 1 Table number; always 60. 2 Day of year. 3 Time of the obs. 0300 is for the hour 0200-0300. 4 Mean temp in Deg . C. 5 Relative humidity in per cent. 6 Vapor Pressure in kPa. 7 Solar radiation in kJ/m**2 * min 8 Mean wind speed in m/s. 9 Vector average wind direction in deg. (0 = north). 10 Standard deviation of wind direction. 11 Precipitation in millimeters. 12 Mean soil temp at 5 cm. in Deg . C. 13 Mean soil temp at 15 cm. in Deg . C. 14 Leaf wetness. 2.2 Data Remarks Temperature, wind speed and wind direction values are averaged over the hour ending with the measurement time. Times are in Mountain Standard Time. Many stations have additional fields on some records. These are for local use. 3.0 Quality Control Processing This data is provided as-is. This data was not quality controlled by UCAR/JOSS. 4.0 References Colorado State University, Cited 2002: CoAgMet Homepage [Available online from http://ccc.atmos.colostate.edu/~coag/]