ENVIRONMENTAL CONSEQUENCES in rocky mountain coniferous ...

Sensible heat flux, evaporative flux and soil heat flux were all negative since
energy is dissipated away from the surface. Sensible heat flux was the largest
throughout the day. The increase in evaporative flux at 1400 hours may have resulted
from instrument location problems. Soil heat flux generally is greater where net
radiation is greater. Measurements made for one day at the Wyoming site show that
the sensible heat flux component was greater on the burned and cleared treatment
areas than on the chip spread area (fig. 7). The soil heat flux component was
greater on the burned area than on the others. Because surfaces were dry, evapora-
tion fluxes under all treatments were lower than sensible heat fluxes.
Table 3. --Forest materials and their thermal conductivity and specific heat (after
Fowler 1974; Lowry 1969).
Specific heat
Thermal conducf v6tyl C
Material cal/crn-' sec C cal grn-I OC-I
Peat 0.0001 5 0.44
Sand (air dry) 0.0004 0.20
Sol 1 0.0006 0.20
Cl ay 0.003 0.70
Wood 0.0003 0.27
Chips 0.00014 0.27
Bark 0.0001 5 0.40
Needl es 0.00008 0.40
Charcoal 0.00012 0.20
Air 0.00005 0.24
Water 0.001 5 1 .O
Granite 0.011 0.21
HOUR
FLUX
F;gure 6. -- Diurnal variation in energy baZance
cowrponants at the surface of a broadcask
burn, Cooram ExperimentaZ Forest, east-
facing 55% slope, July 28, 1976,