| OnepModel14 {SoilR} | R Documentation |
This function creates a model for one pool. It is a wrapper for the more
general function GeneralModel_14.
OnepModel14( t, k, C0, F0_Delta14C, In, xi = 1, inputFc, lambda = -0.0001209681, lag = 0, solver = deSolve.lsoda.wrapper, pass = FALSE )
t |
A vector containing the points in time where the solution is
sought. It must be specified within the same period for which the Delta 14 C
of the atmosphere is provided. The default period in the provided dataset
|
k |
A scalar with the decomposition rate of the pool. |
C0 |
A scalar containing the initial amount of carbon in the pool. |
F0_Delta14C |
A scalar containing the initial amount of the radiocarbon fraction in the pool in Delta_14C format. |
In |
A scalar or a data.frame object specifying the amount of litter inputs by time. |
xi |
A scalar or a data.frame specifying the external (environmental and/or edaphic) effects on decomposition rates. |
inputFc |
A Data Frame object consisting of a function describing the fraction of C_14 in per mille. The first column will be assumed to contain the times. |
lambda |
Radioactive decay constant. By default lambda=-0.0001209681 y^-1 . This has the side effect that all your time related data are treated as if the time unit was year. |
lag |
A (positive) scalar representing a time lag for radiocarbon to enter the system. |
solver |
A function that solves the system of ODEs. This can be
|
pass |
if TRUE Forces the constructor to create the model even if it is invalid |
There are other predefinedModels and also more
general functions like Model_14.
years=seq(1901,2009,by=0.5)
LitterInput=700
Ex=OnepModel14(t=years,k=1/10,C0=500, F0=0,In=LitterInput, inputFc=C14Atm_NH)
C14t=getF14(Ex)
plot(C14Atm_NH,type="l",xlab="Year",ylab="Delta 14C (per mil)",xlim=c(1940,2010))
lines(years, C14t[,1], col=4)
legend(
"topright",
c("Delta 14C Atmosphere", "Delta 14C in SOM"),
lty=c(1,1),
col=c(1,4),
lwd=c(1,1),
bty="n"
)