ka: air side gas transfer velocity

In tomhull/airsea: Tools for air/sea gas exchange

air side gas transfer velocity

Description

Calculates air side gas transfer velocity (ka).

Usage

ka(compound, T, u, method = "JO10")

Arguments

compound	character string of compound of interest
T	vector o temperature in degrees Centigrade
u	vector of wind speed in meters per second at 10 meters height
method	optional string determining kw parameterisation to use, see XXX for list default is 'JO10' (Johnson 2010)

Details

By default implements the gas transfer velocity parametrisation proposed by Johnson 2010, which is a modified form of that presented by Jeffrey et al., 2010 (Ja10) Other options are: Liss 1973, windspeed only parameterisation (L73) Duce et al, 1991 (D91), theoretical ka Mackay and Yeun 1983 (MY83), empirical fit to wind tunnel study Jeffrey et al 2010 (JE10), unmodified, a parameterisation of NOAA COARE

For full details of parameterisations, choice of drag coefficient and diffusivity calculations see Johnson 2010

Value

vector of gas transfer velocity in meters per second

References

Johnson, M. T. A numerical scheme to calculate temperature and salinity dependent air-water transfer velocities for any gas. Ocean Sci. Discuss. 7, 251-290 (2010).

Jeffery, C., Robinson, I., and Woolf, D.: Tuning a physically-based model of the air-sea gas transfer velocity, Ocean Modell., 31,28-35, doi:10.1016/j.ocemod.2009.09.001, 2010..

Liss, P.: Processes of gas exchange across an air-water interface, Deep Sea Res., 20, 221-238, doi:10.1016/0011-7471(73)90013-2, 1973.

Mackay, D. and Yeun, A. T. K.: Mass transfer coefficient correlations for volatilization of organic solutes from water, Environ. Sci. Technol., 17, 211-217, doi:10.1021/es00110a006, 1983

Duce, R. A., Liss, P., Merrill, J. T., Atlas, E. L., Buat-Menard, P.,Hicks, B. B., Miller, J. M., Prospero, J. M., Arimoto, R., Church, T. M., Ellis, W., Galloway, J. N., Hansen, L., Kickells, T., Knap, A. H., Reinhardt, K. H., Schneider, B., Soudine, A., Tokos, J. J., Tsunogai, S., Wollast, R., and Zhou, M.: The atmospheric input of trace species to the World ocean, Global Biogeochem. Cy., 5, 193-259, 1991

Examples

kw('O2', 10, 7, 35)  # gas transfer velocity for oxygen at 10oC, 7 m-1 s-1 winds and 35 salinity.

tomhull/airsea documentation built on Oct. 26, 2023, 3:29 a.m.