Measurements in soil and air at Samoylov Station (2002-2018), version 201908

The instrumentation, calibration, proccessing and data quality control is explained in Boike et al. (2018). The mean annual air temperature 1998–2017 was calculated as -12.3 °C, but includes years with missing data (1998, 2000–2003, 2005, 2006, 2009, 2010).

Including only years with full data records (1999, 2004, 2007-2017), the mean annual air temperature is -11.7 °C. Similarly, the mean monthly temperatures of the warmest month (July) is computed as 9.4 °C (average of years 1999, 2004, 2005, 2007, 2008, 2011-2017) and for the coldest month (February) -31.7 °C (average of months of 1999, 2000, 2004, 2005, 2007, 2008, 2011-2017). The average summer rainfall (June-October) was 145.2 mm (average of years 1999, 2003–2008, 2011-2017).