The airsea R package

What is this repository for?

Tools for marine air-sea gas exchange studies.
Version 0.1

What can the package do?

Calculate water-side and air-side gas transfer velocity using a range of modern parametisations.
Calculate Schmit numbers for (almost) any gas
Calculate bubble supersaturation effects (bubble induced equilibrium concentration)
Calculate net community production from in-situ oxygen observations (also known as open water metabolism).
Calculate various seawater properies, density, viscosity...

airsea and marelac

marelac and airsea have some similar features with differing implementation:

Schmit number calculation, however marelac assumes 35 salinity, airsea has more gasses.
Gas saturation concentration, airsea only includes O2 based on Benson and Krause. marelac uses Weiss for several gases and includes pressure compensation.

Gasses in marelac `gas_schmit` but not in airsea

Helium (He)
Sulfur hexafluoride (SF6)
Trichlorofluoromethane (CCl3F)
Dichlorodifluoromethane (CCl2f2)

TODO

explore marelac vs liang solubility
fully implement liang2013 bubble and kw

Installation

library(devtools)
install_github("tomhull/airsea")

References

Hull T, Greenwood N, Kaiser J, Johnson M. Uncertainty and sensitivity in optode-based shelf-sea net community production estimates. Biogeosciences Discuss. Copernicus GmbH; 2015;12: 15611–15654. doi:10.5194/bgd-12-15611-2015
Core gas transfer work taken from: Johnson MT. A numerical scheme to calculate temperature and salinity dependent air-water transfer velocities for any gas. Ocean Sci Discuss. 2010;7: 251–290. doi:10.5194/osd-7-251-2010