fire_severity | R Documentation |
Functions to estimate fire effects on foliage, buds and cambium, based on the model by Michaletz & Johnson (2008)
fire_plumeTemperature(Ib_surf, z, T_air = 25, rho_air = 1.169)
fire_barkThermalDiffusivity(fmc_bark, rho_bark = 500, T_air = 25)
fire_radialBoleNecrosis(
Ib_surf,
t_res,
bark_diffusivity,
T_air = 25,
rho_air = 1.169,
T_necrosis = 60
)
fire_leafThermalFactor(SLA, h = 130, c = 2500)
fire_necrosisCriticalTemperature(
t_res,
thermal_factor,
T_air = 25,
T_necrosis = 60
)
fire_necrosisHeight(
Ib_surf,
t_res,
thermal_factor,
T_air = 25,
rho_air = 1.169,
T_necrosis = 60
)
Ib_surf |
Surface fireline intensity (kW/m). |
z |
height (m). |
T_air |
Air temperature (degrees Celsius). |
rho_air |
Air density (kg/m3). |
fmc_bark |
Bark moisture content (% dry weight). |
rho_bark |
Bark density (kg/m3). |
t_res |
fire residence time (seconds). |
bark_diffusivity |
Bark thermal diffusivity (m2/s). |
T_necrosis |
Temperature of tissue necrosis (degrees Celsius). |
SLA |
Specific leaf area (m2/kg). |
h |
Heat transfer coefficient |
c |
Specific heat capacity |
thermal_factor |
Tissue thermal factor. |
Function fire_plumeTemperature
returns the plume temperature at a given height.
Function fire_barkThermalDiffusivity
returns the bark thermal diffusivity given a bark moisture value.
Function fire_radialBoleNecrosis
returns the depth of radial bole necrosis in cm.
Function fire_leafThermalFactor
returns the thermal factor of leaves as a function of specific leaf area.
Function fire_necrosisCriticalTemperature
returns the (plume) temperature yielding necrosis for a given residence time and tissue thermal factor.
Function fire_necrosisHeight
returns the height (in m) of necrosis for tissues with given thermal factor.
Michaletz, S.T., and Johnson, E.A. 2006. A heat transfer model of crown scorch in forest fires. Can. J. For. Res. 36: 2839–2851. doi:10.1139/X06-158.
Michaletz ST, Johnson EA. 2008. A biophysical process model of tree mortality in surface fires. Canadian Journal of Forest Research 38: 2013–2029.
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