oce (version 0.8-3)

redfieldNP: Redfield's (1934) NO3 and PO4 data

Description

Data digitized from Redfield's (1934) Figure 1, showing NO$_3$ dependence on PO$_4$. This dataset is used in Chapter 3 of Kelley (2011).

Usage

data(redfieldNP)

source

Data digitized by Dan Kelley from a scanned copy of Redfield's (1934) Figure 1, showing the dependence of NO$_3$ on PO$_4$.

References

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

Alfred C. Redfield, 1934. On the proportions of organic derivations in sea water and their relation to the composition of plankton. Pages 177--192 in James Johnstone Memorial Volume, University Press of Liverpool.

See Also

See redfieldNC and redfieldPlankton.

Examples

data(redfieldNP)
attach(redfieldNP)
attach(redfieldNP)
plot(PO4, NO3, xlab=expression(PO[4]), ylab=expression(NO[3]))
abline(0, 20, lwd=3)                   # line N:P = 20:1, as shown by Redfield