Fig. 5. Time series of (a) soil temperature and heat capacity as measured by the heat pulse sensors for the 0-to 6-cm layer at the bare soil site on July 24; (b) heat storage estimated by neglecting C/t (Eq. [3]), by using a constant value for heat capacity (Eq. [4]), and by including C/t (Eq. [5]); and (c) cumulative heat storage for the day using the same three approaches.