fire_severity: Fire severity functions
In medfate: Mediterranean Forest Simulation

fire_severity

R Documentation

Fire severity functions

Description

Functions to estimate fire effects on foliage, buds and cambium, based on the model by Michaletz & Johnson (2008)

Usage

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
)

Arguments

`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.

Value

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.