Soil temperature measured at 0.2 m depth using Campbell Scientific 107-L temperature probe. Data comments: 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. 2007-2009: Data suspect or deleted occasionally. 2013: Change of measuring method in logger program (from 250 Hz to 50 Hz) in August caused a shift in data. Contact program manager for more detailed information.