Soil Temperature

TS05, TS10, TS15, TS25, TS30, and TS45

Soil Temperature, under sod (5, 10, 15, 25, 30, and 45 cm)

The average temperature at a depth of 5, 10, 15, 25, 30, or 45 cm below the ground; the surface under which the measurement is taken is vegetated. Not all depths are available for all periods. Prior to January 2009 (for Little Washita) and March 2009 (for Fort Cobb), stations observed 5, 10, 15, and 30-cm soil temperatures as measured by a Stainless Steel Encased 10K Thermistor Probe. Since those times, all sites observe 5, 25, and 45-cm soil temperatures as measured by the Stevens Hydra Probe. Prior to January 2012, observations were measured at 15-minute intervals; since then, observations have been measured at 5-minute intervals.

 

Stainless Steel Encased 10K Thermistor Probe pictured. Coiled cord leads to a thin pointy rod used to measure soil temperature
Stainless Steel Encased 10K Thermistor Probe (Units: ºC | Accuracy: ± 0.5 ºC)
Stevens Hydra Probe pictured. Coiled cord leads to socket like sensor with 3 small spikes coming out of it. Used to measure soil temperature and soil moisture.
Stevens Hydra Probe (Units: ºC | Accuracy: ± 0.6 ºC)