Description Usage Arguments Details Value Author(s) References Examples
View source: R/fireIndex_function.R
Methods to estimate fire weather indices using static weather observations.
1 | fireIndex(temp, u, rh, fuel = 4.5, cure = 100)
|
temp |
a numeric vector of air temperatures (C) |
u |
a numeric vector of wind speeds (km/hr) |
rh |
a numeric vector of relative humidities (%) |
fuel |
a numeric vector of available fuel load (Mg/ha), defaults to 4.5 |
cure |
a numeric vector for proportion of cured grass (%), defaults to 100 |
This function computes seven methods to estimate static fire weather indices: the Angstrom Index, the Chandler Burning Index, the Hot Dry Windy Index, the Fuel Moisture Index, the Fosberg Fire Weather Index,
the MacArthur Grassland Mark 4 Index, and the MacArthur Grassland Mark 5 Index. Each of these are static in that values are derived using a
daily weather summary and do not consider weather during prior days.
temp
, rh
and u
are required for all methods.
The latter two indices also use fuel
, and the Grassland Mark 4 Index uses cure
. Defaults for fuel
and cure
are provided, but can be specified by the user. Sharples (2009a, b) review all of the methods.
a data frame of static fire weather index values
Justin P Ziegler, justin.ziegler@colostate.edu
Sharples, J.J., McRae, R.H.D., Weber, R.O. and Gill, A.M., 2009a. A simple index for assessing fuel moisture content. Environmental Modelling & Software, 24(5):637-646.
Sharples, J.J., McRae, R.H.D., Weber, R.O. and Gill, A.M., 2009b. A simple index for assessing fire danger rating. Environmental Modelling & Software. 24(6):764-774.
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