% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/utils.R
\name{arrhenius}
\alias{arrhenius}
\title{Arrhenius Temperature Correction}
\usage{
arrhenius(temp, T_ref = 293.15, T_A = 8000)
}
\arguments{
\item{temp}{Body (or ambient) temperature in Kelvin.  Renamed from
\code{T} in version 0.1.4 to avoid shadowing R's built-in \code{T} symbol
(= \code{TRUE}); pass positionally or use \code{temp = ...} explicitly.}

\item{T_ref}{Reference temperature in Kelvin (default 293.15 K = 20 °C).}

\item{T_A}{Arrhenius temperature in Kelvin (default 8000 K).}
}
\value{
Numeric correction factor (dimensionless, > 0).
}
\description{
Computes the temperature correction factor for DEB rate parameters
based on the Arrhenius relationship (Kooijman, 2010, Eq. 1.2).  In
DEB theory all rate parameters (e.g., \eqn{\{p_{Am}\}}, \eqn{[p_M]},
\eqn{v}) scale with temperature by the same factor:
}
\details{
\deqn{c_T = \exp\!\left(\frac{T_A}{T_{\mathrm{ref}}} - \frac{T_A}{T}\right)}

where \eqn{T} and \eqn{T_{\mathrm{ref}}} are in Kelvin and \eqn{T_A}
is the Arrhenius temperature (a species-specific constant, typically
6000--12000 K for ectotherms; Kooijman, 2010, Table 8.1).  At
\eqn{T = T_{\mathrm{ref}}}, the factor is exactly 1.
}
\examples{
# Correction at 25 C relative to 20 C reference
arrhenius(298.15, T_ref = 293.15, T_A = 8000)  # ~ 1.74

# No correction at reference temperature
arrhenius(293.15)  # exactly 1
}
\references{
Kooijman, S.A.L.M. (2010). \emph{Dynamic Energy Budget Theory for Metabolic
Organisation}. 3rd edition. Cambridge University Press, Eq. 1.2.
\doi{10.1017/CBO9780511805400}
}
