marelac (version 2.0)

sw_sfac: Salinity conversion factors

Description

Factors to convert from practical to absolute salinity and vice versa.

Usage

sw_sfac

References

Millero FJ, Feistel R, Wright DG and McDougall TJ, 2008. The composition of Standard Seawater and the definition of the Reference-Composition Salinity Scale, Deep-Sea Res. I, 55, 50-72. McDougall TJ, Jackett DR and Millero FJ, 2009. An algorithm for estimating Absolute Salinity in the global ocean. Ocean Science Discussions 6, 215-242. http://www.ocean-sci-discuss.net/6/215/2009/ Uses the Fortran code written by David Jackett http://www.marine.csiro.au/~jackett/TEOS-10/

See Also

convert_PStoAS, to convert from practical salinity to absolute salinity

convert_AStoPS, to convert from absolute salinity to practical salinity

Examples

mf <- par(mfrow=c(2,1))
ma <- par(mar=c(3,5,2,5))

dsal <- t(sw_sfac$del_sa[1,,])
dsal [dsal < -90]<-NA
image(sw_sfac$longs, sw_sfac$lats, dsal, col=femmecol(100),
      asp=TRUE,xlab="dg",ylab="dg",
      main="salinity conversion - p = 0 bar")
contour(sw_sfac$longs, sw_sfac$lats, dsal, asp=TRUE, add=TRUE)

dsal <- t(sw_sfac$del_sa[5,,])  # 5th depth level sw_sfac$p[5]
dsal [dsal < -90]<-NA
image(sw_sfac$longs, sw_sfac$lats, dsal, col=femmecol(100),
      asp=TRUE, xlab="dg", ylab="dg",
      main="salinity conversion - p = 4 bar")
contour(sw_sfac$longs, sw_sfac$lats, dsal, asp=TRUE, add=TRUE)

par("mfrow"=mf)
par("mar"=ma)