Figure 2. Soil temperature (10 cm) deviation (oC) from the mean (i.e., average temperature of plots without heat loading, HT) in all fens that were treated with high, intermediate, and low water tables (WT). Heated plots (HT1 and HT2) were cooler during the winter than unheated plots (HT0); and most temperature effects were in spring. Water treatments in the summer have resulted in temperature deviation throughout the year.