Soil temperatures during and following low-intensity prescribed burning in a Eucalyptus pauciflora forest
1986
Raison, R.J. | Woods, P.V. | Jakobsen, B.F. | Bary, G.A.V. (Commonwealth Scientific and Industrial Research Organization, Canberra (Australia). Div. of Forest Research)
Mean maximum temperatures during the fire were 600, 450, 54 and 42 degrees C in the litter and 0, 2 and 5 cm soil depths respectively. The highest recorded at 0, 2 and 5 cm were 703, 94 and 44 degrees. Temperatures over 200 degrees, which result in volatilization of N from soil organic matter, were estimated to have occurred in the top 3 mm of soil. Byram fire intensity tended to be negatively correlated with the maximum temperature measured at the soil surface but was not correlated with the amount of heat absorbed by black cans (thermal integrators) or the increase in the heat content of the soil. After the burn, the mean daily maximum temperatures in the soil were markedly higher on burnt than on unburnt sites; mean daily minima were similar to or slightly lower than those on unburnt sites. Average day-time temperature in recently burnt forest in summer was elevated by up to 8 and 4 degrees at 0 and 10 cm soil depths.
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