GCIP/ESOP-98 Princeton, MN Surface Meteorological and Radiation Data Set ------------------------------------------------------------------------ 1.0 General Information This data set was provided to UCAR/JOSS by Dr. John Baker Soil Scientist at the USDA/ARS and an Adjunct Associate Professor at the Department of Soil, Water, and Climate at the University of Minnesota. For further information on these data please contact him via e-mail at jbaker@soils.umn.edu or via phone at (612) 625-4249. 2.0 Site Location The Princeton site is located at: Latitude Longitude Elevation (msl) ----------- ----------- ----------------- For variables 7-12 (see Section 4.0): 45.52721 N 93.62076 W 302.61 m (MSL) For variables 4-6, 13 (also LI-COR pyranometer) (see Section 4.0) 45.52508 N 93.62237 W 302.65 m (MSL) 3.0 Instrumentation Parameter Equipment --------------------------------------------------------------- Air Temperature Vaisala HMP 35D Relative Humidity Vaisala HMP 35D Windspeed R.M. Young 03101 Wind Sentry (2 m) Incoming Solar Radiation Eppley Black & White Pyranometer (8-48) Reflected Solar Radiation Eppley Black & White Pyranometer (8-48) Incoming Longwave Radiation Eppley PIR pyrogeometer Outgoing Longwave Radiation Eppley PIR pyrogeometer Snow Depth NovaLynx 260-700 Ultrasonic Snow Depth Sensor Precipitation Geonor T-200 Vibrating Wire Precipitation Gauge Precipitation TE525 Tipping Bucket Rain Gauge 4.0 Data Set Information Field data measured at Princeton, MN for the period 1 October 1997 (Julian day 274) to 31 May 1998 (Julian day 151) can be found in the following comma delineated files: Pmain.csv- 45.52721 N, 93.62076 W, 302.61 m (MSL) variables 7-12 45.52508 N, 93.62237 W, 302.65 m (MSL) variables 4-6, 13 (also LI-COR pyranometer) 1. Year 2. Julian Day of Year (1-365) 3. Time of Day (Hr:Min) 4. Air temperature (C), Vaisala HMP 35D 5. Relative humidity (%), Vaisala HMP 35D 6. Wind speed @ 2m (m/s), R.M. Young 03101 Wind Sentry 7. Incoming solar radiation (W/m^2), Eppley Black & White Pyranometer (8-48) 8. Reflected solar radiation (W/m^2), Eppley Black & White Pyranometer (8-48) 9. Incoming longwave radiation (W/m^2), Eppley Pyrgeometer (PIR) 10. Outgoing longwave radiation (W/m^2), Eppley Pyrgeometer (PIR) 11. Snow Depth (cm), NovaLynx 260-700 Ultrasonic Snow Depth Sensor 12. Precipitation (mm), cumulative water equivalent, Geonor T-200 Vibrating Wire Precipitation Gauge 13. Precipitation (in), water equivalent during time period, TE525 Tipping Bucket Rain Gauge 5.0 Quality Control Information These data were quality assured and quality controlled at the University of Minnesota, UCAR/JOSS has not changed these data in any way, and has conducted no quality control on this data set. Reasons for missing or bad data- 1. 274, 1997 to 317, 1997- Equipment used to measure 7-11 not installed. Incoming solar radiation data supplied by LI200S LI-COR Silicon Pyranometer at existing weather station. 2. 317, 1997 to 325, 1997- Loose wire from upward facing pergeometer to multiplexer. 3. 274, 1997 to 330, 1997- Geonor precipitation gauge is not installed. 4. 330, 1997 to 351, 1997- TH-501 interface card for Geonor precipitation gauge is not working. 5. 315, 1997 to 351, 1997- TE525 tipping bucket rain gauge is not heated and air temperatures are below freezing. 6. 362, 1997 to 2, 1998- Voltage in batteries dropped below the 9.6 V needed to run the datalogger. Caused by low water level in batteries (water was frozen in one) and many consecutive cloudy days (solar panel).