seacarb is an R package that calculates parameters of the seawater carbonate system and includes functions useful for ocean acidification research. Version 2.4.4 has just been released. Some code optimization was performed leading to a dramatic increase in speed (up to 6x faster).
Note that it may take a few days for the package to propagate to the various R servers.
As always, bug reports (hopefully none!) and suggestions are welcome (gattuso(at)obs-vlfr.fr) and Héloïse Lavigne (lavigne(at)obs-vlfr.fr).
Lavigne H. & Gattuso J.-P., 2012. seacarb: seawater carbonate chemistry with R. R package version 2.4.4. http://CRAN.R-project.org/package=seacarb.