vapress {seacarb}

Computes vapor pressure of seawater

Description

Computes vapor pressure of seawater (atm) from temperature and salinity

Usage

vapress(S=35, T=25, form="d2007")

Arguments

S

Salinity on the practical salinity scale, default is 35

T

Temperature in degrees Celsius, default is 25oC

form

choose either "d2007" for the best-practices formulation to compute vapor pressure of seawater from Dickson et al. (2007) or "wp1980" for the formulation from weiss and Price (1980).

Details

Computes the vapor pressure of seawater pH20 following best practices (Dickson et al., 2007). That computed pH20 is identical, when rounded to the 4th decimal place, with that computed by the equation from Weiss and Price (1980).

Value

vapress

Vapor pressure of seawater in atm

Author(s)

James Orr [e-mail]

References

Dickson A. G., Sabine C. L. and Christian J. R. (2007) Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 1-191.

Weiss, R. F. (1974) Carbon dioxide in water and seawater: the solubility of a non-ideal gas, Marine Chemistry, 2, 203-215.

Weiss, R. F. and Price, B. A. (1980) Nitrous oxide solubility in water and seawater, Marine Chemistry, 8, 347-359.

See Also

x2pCO2, and p2xCO2.

Examples

   pH20 <- vapress(S=35, T=25, form="d2007")