Soil temperature measured at 0.025 m depth using Campbell Scientific 107-L temperature probe. Data comments: 1995-1999: Data from the upper three sensors are very similiar (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. Data is suspect. 1995-2015: Data in this period has earlier been published with a correction according to the autumn zero curtain. Since June 2020 the original non-corrected data from this period is published. 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. 2009-2010: periods of missing data related to unstable battery charge. 2011: Change of measuring method in logger program (from 50 Hz to 250 Hz) in August caused a shift in data. 2013: Change of measuring method in logger program (from 250 Hz to 50 Hz) in August caused a shift in data. 2015-2018: At station visit in 2015 sensors down to 5 cm were dug free. After this the two upper sensors seem to be disturbed or located at new depths. Data is suspect. 2018: Upper two sensors exchanged and placed in new hole. 2019: Sensor has moved upwards due to cryoturbation and depth is approx. 1 cm instead. 2020-2021: Sensor is above surface and is deleted from the data set as it is in fact a near surface air temperature. Contact program manager for more detailed information.
