Nothing
#
# vim:set ff=unix expandtab ts=2 sw=2:
fW.Century<- structure(
function #Effects of moisture on decomposition rates according to the CENTURY model
### Calculates the effects of precipitation and potential evapotranspiration on decomposition rates.
##references<< Adair, E. C., W. J. Parton, S. J. D. Grosso, W. L. Silver, M. E. Harmon, S. A. Hall, I. C. Burke, and S. C. Hart (2008),
##Simple three-pool model accurately describes patterns of long-term litter decomposition in diverse climates, Global Change Biology, 14(11), 2636-2660.
## \code{\\} Parton, W. J., J. A. Morgan, R. H. Kelly, and D. S. Ojima (2001), Modeling soil C responses to environmental change in grassland systems,
##in The potential of U.S. grazing lands to sequester carbon and mitigate the greenhouse effect, edited by R. F. Follett, J. M. Kimble and R. Lal, pp. 371-398, Lewis Publishers, Boca Raton.
(PPT, ##<< A scalar or vector containing values of monthly precipitation.
PET ##<< A scalar or vector containing values of potential evapotranspiration.
)
{
1/(1+30*exp(-8.5*(PPT/PET)))
### A scalar or a vector containing the effects of precipitation and potential evapotranspiration on decomposition rates (unitless).
}
,
ex=function(){
PPT=seq(0,1500,by=10)
PET=rep(1500,length(PPT))
PPT.PET=fW.Century(PPT,PET)
plot(PPT/PET,PPT.PET,
ylab="f(PPT, PET) (unitless)",
main="Effects of precipitation and potential evapotranspiration on decomposition rates")
}
)
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