oce (version 0.8-3)

riley: Riley's (1946) observation and theory of phytoplankton concentration

Description

Riley's (1946) observation and theory of phytoplankton concentration. The list riley contains three entries.

• riley$fig21pointsis a list representing the data shown in Riley's Figure 21. Resulting from digitization of his graph, this is a list containingday(day in year) andP(phytoplankton concentraiton, in grams of Carbon per square meter.
• riley$fig21curveis a function representing Riley's numerical solution of the differential equations he proposes as a model of phytoplankton growth. prediction, shown in his Figure 21. theoretical curve that Riley calculated, numerically. (SeeDetailsfor how to use ibased on digitization of Riley's prediction, shown in his Figure 21. theoretical curve that Riley calculated, numerically. (SeeDetailsfor how to use this.)
• DEparametersis a list containing data about twice per month, in elementsdayfor the day of the year,Phfor phytoplankton growth rate,Rfor phytoplankton respiration rate, andGfor the rate at which zooplankton graze on phytoplankton. The rates are in inverse days.

This is used in Chapter 3 of Kelley (2011).

Usage

data(riley)

source

riley$fig21points is based on manual manual digitization of Riley's Figure 21. riley$fig21curve are based on manual digitization of Riley's theoretical curve in the same figure, fitted to a spline with splinefun, which yields a function that can be used to predict at any time. riley$DEparameters was transcribed from Riley's appendix.

References

Dan Kelley, in preparation. Oceanographic Analysis with R. Springer Verlag.

Gordon A. Riley, 1946. Factors controlling phytoplankton populations on Georges Bank. Journal of Marine Research, 6(1): 54-73.

Examples

library(oce)
data(riley)
plot(riley$fig21points$day, riley$fig21points$P, xlab="Day of Year", ylab="Phytoplankton [gC/m^2]")
day <- seq(0, 365, 5)
lines(day, riley$fig21curve(day))