TITLE: Mesonet Colorado Agricultural Meteorological Network (CoAgMet) Data [JOSS] CONTACTS: Roger A. Pielke Sr. Colorado Climate Center Department of Atmospheric Science Colorado State University Fort Collins, Colorado 80523 Email c/o odie@atmos.colostate.edu 970-491-8293 (voice) 970-491-8293 (fax) or Nolan Doesken Research Associate nolan@ccc.atmos.colostate.edu 970-491-8506 (voice) 970-491-8449(fax) 1.0 DATA SET OVERVIEW This data set contains hourly resolution surface meteorological data from the Colorado Agricultural Meteorological Network (CoAgMet) These CoAgMet stations are located across the state of Colorado. This data set covers the period from 01 May to 31 July 2003 and includes 44 CoAgMet stations. The data are in comma-delimited ASCII format. 2.0 INSTRUMENT DESCRIPTION Information in this readme is from the CoAgMet home page at the Colorado Climate Center (http://ccc.atmos.colostate.edu/~coagmet/). This is the description of a typical CoAgMet station. Most stations have a similar configuration, but sensors, dataloggers and settings vary somewhat throughout the network. 2.1 Temperature and Relative Humidity Sensors Model: Vaisala HMP35C Probe Sensor Height: 1.5 meters Temperature Specs Temperature Measurement Range: -35 to 50 C Thermistor Interchangeability Error: Typically <+-0.2 C over 0 C to 60 C; +-0.4 C at -35 C Polynomial Linearization Error: <+-0.5 C over -35 C to 50 C Relative Humidity Specs RH Measurement Range: 0% to 100% RH Accuracy (at 20 C) +- 2%, 0% - 90%; +-3% > 90% Temperature Dependence of RH Measurement: +-0.04% RH/C 2.2 Wind Sensors Model: R.M. Young 05103 Wind Monitor Sensor Height: 2 meters Wind Speed Specs Range: 0-60 m/s Starting Threshold: 1.0 m/s Distance Constant (63% recovery): 2.7 m. Wind Direction Specs Range: 0-360 Deg. (355-360 open) Starting Threshold 10 deg displacement: 0.9 m/s Starting Threshold 5 deg displacement: 1.3 m/s 2.3 Solar Radiation Sensors Model: Licor 200S Pyranometer Specs Sensor Height ~2m 0-10 mv output range Sensitivity typically 80 microamp/1000 W/m2 Linearity Maximum deviation 1% up to 3000 W/m2 Spectral response from 0.4 to 1.1 mu Typical error under natural daylight +-3%, maximum +-5% 2.4 Precipitation Sensors Model: TE525 tipping bucket raingage Specs Sensor height >1m Collector diameter - 154mm 0.254mm/tip accuracy +- 1% for precip of 50mm/hr or less Operating temperature 0 to 50 C (not accurate during winter) 2.5 Soil Temperature Sensors Model: CSI Model 107 Soil Temp Probe (thermistor) Specs +- 0.4C for -33 to +48C all errors inclusive Sensor depth 50mm and 150mm where two sensors used, 100mm where only one. 2.6 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 Sensor height: ~0.5m 2.7 Data Logger Model: Campbell Scientific CR10 2.8 Station Locations ID Station Name Location Latitude Longitude Elev. ------------------------------------------------------------------------------ ALT01 Ault Station 1 mi SE of Ault 40.5717 -104.732 4,910 AVN01 Avondale 1 mi SE of Avondale 38.25 -104.367 4,580 BLA01 Blanca 8 mi SW of Blanca 37.6239 -105.557 7,760 BRG01 Briggsdale 3 mi S of Briggsdale 40.5947 -104.319 4,858 BRL01 Burlington North 18 mi NNE of Burlington 39.4998 -102.074 3,900 BRL02 Burlington No. 2 6 mi SE Burlington 39.2651 -102.109 4,170 CTR01 Center CSU San Luis Valley Res Ctr 37.7067 -106.145 7,702 CTZ01 Cortez 9 mi SW Cortez 37.225 -108.672 6,030 DLT01 Delta 3 mi W of Delta 38.735 -108.117 5,010 DVC01 Dove Creek 4 mi NW of Dove Creek 37.7265 -108.954 6,590 EAC01 Eastern Adams Co. 10 mi W of Last Chance FRT02 CSU Fruita Expt 2 mi ENE of Fruita 39.1803 -108.699 4,519 FTC01 Fort Collins AERC 4 mi NW of Fort Collins 40.5947 -105.137 5,120 FTC03 Fort Collins ARDEC 6 mi NE of Fort Collins 40.6523 -104.996 5,110 FTL01 Fort Lupton 6 mi SSW of Lupton 40.0007 -104.849 5,055 FTM01 Fort Morgan 8 mi W of Ft Morgan 40.2585 -103.954 4,320 GJC01 Grand Junction 3 mi NW of Grand Jct 39.1738 -108.631 4,869 GLY03 Greeley 2.5 mi NE of Greeley 40.4393 -104.647 4,680 HLY01 Holly 5 mi NW of Holy 38.07 -102.09 3,636 HNE01 Hoehne NE of Trinidad 37.2893 -104.313 5,610 HOT01 Hotchkiss 4 mi W of Hotchkiss HXT01 Haxtun 2.5 mi NW of Haxtun 40.6722 -102.647 4,040 HYK02 Holyoke 12 mi SE Holyoke 40.4909 -102.089 3,735 IDL01 Idalia 2 mi N of Idalia 39.7312 -102.089 3,975 KRK01 Kirk 3 mi W of Joes 39.6554 -102.621 4,213 KSY01 Kersey 2 mi SE of Kersey 40.3773 -104.532 4,625 LAM01 Lamar #1 4.5 mi S of Lamar 37.9807 -102.596 LAM02 Lamar #2 7 mi NNE Lamar 38.1734 -102.559 3.736 LAM03 Lamar #3 10 mi SW Lamar 37.5856 -102.428 3,918 LCN01 Lucerne 1/4 mi SW of Lucerne 40.4753 -104.707 4,750 OTH01 Olathe 3 mi NE of Olathe 38.6333 -108.05 5,324 PAI01 Paoli RD U and 59 40.4248 3,925 PKH01 Peckham 3.5 mi ENE of Peckham 40.3128 -104.727 4,710 RFD01 CSU Rocky Ford Expt 2.5 mi SE of Rocky Ford 38.0333 -103.7 4,180 RFD02 Rocky Ford NRCS 2.5 mi SE of Rocky Ford SAN01 San Luis 2 mi N of Mesita TWC01 Towaoc Ute Farm at Towaoc 37.102 -108.561 VLD01 Vineland 13 mi SE of Pueblo 38.2317 -104.467 4,700 WGG01 Wiggins 06 NNE of Wiggins 40.3333 -104.036 4,447 WGG02 Wiggins 39 ENE of Wiggins 40.2998 -103.952 4,421 WRY01 Wray 10 mi N of Wray 40.1924 -102.203 YJK01 Yellow Jacket 2.5 mi NW of Yellow Jacket 37.3943 -108.739 6,840 YUC01 Yucca House Mesa Verde Natl Park 37.2478 -108.687 YUM02 Yuma #2 2.5 mi N of Yuma 40.1504 -102.724 4,104 Elevations are in feet. Elevations for BRL01, FTM01 and PAI01 are estimated by the Colorado Climate Center. 3.0 DATA COLLECTION AND PROCESSING Information on the collection and processing of these data can be found at the Colorado Climate Center CoAgMet page: http://ccc.atmos.colostate.edu/~coagmet/ UCAR/JOSS conducted no processing or quality control on these data. 4.0 DATA FORMAT AND FILE NAMING 4.1 Data Format These data are in comma-delimited ASCII format. 1. Station ID 2. Datetime (in the format YYYY-MM-DD HH:MM:SS) 3. Mean Temperature (Celsius) 4. Relative Humidity (Percent) 5. Vapor Pressure (kPa) 6. Solar Radiation (kJ/m^2 * min) 7. Mean Wind Speed (m/s) 8. Vector Average Wind Direction (in Degrees, 0 and 360 being north) 9. Standard Deviation of Wind Direction 10. Precipitation (millimeters) 11. Soil Temp at 5cm (Celsius) 12. Soil Temp at 15cm (Celsius) 13. Leaf Wetness 4.2 File Naming conventions ALT01.txt where: alt01 is the station ID 5.0 DATA REMARKS None. 6.0 REFERNCES None.