Soil temperature measured at 0.05 m depth using Campbell Scientific 107-L temperature probe. Data comments: 1995-1999: Data from the upper three sensors are very similar (daily amplitudes of temperatures are almost the same). Could be related to percolating water or because the tube with sensors was not completely covered/below ground. 2004-2006: Data deleted or suspect due to high frequency fluctuations (noise) in data related to unstable battery charge or broken sensor. August 2006: all sensors were replaced, new sensors installed in a new hole. 2007: Data suspect due to noise. 2008: Data deleted occasionally due to problems with sensor. 2013: Change of measuring method in logger program (from 250 Hz to 50 Hz) in August caused a shift in data. 2015: Sensor replaced at station visit in mid-August. Contact program manager for more detailed information.
