kw: water side gas transfer velocity

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

water side gas transfer velocity

Description

Calculates water side gas transfer velocity (kw).

Usage

kw(compound, T, u, S, method = "WA14", normalize = 0, schmidt_method = "WA")

Arguments

compound	character string of compound of interest
T	vector of temperature in degrees Centigrade
u	vector of wind speed in meters per second at 10 meters height
S	vector of salinity
method	optional string determining kw parameterisation to use, see details for list default is 'WA14' (Wanninkhof et al, 2009)
normalize	optional integer Schmitt number, if not = 0 kw values are normalised to specified Schmitt number. Default is 0
schmidt_method,	see ‘Sch' documentation for details, Default is ’WA'

Details

TODO - K_calcs scheme By default implements the gas transfer velocity parametrisation of Wanninkhov, 2014 (WA14). Other options are: Wanninkhov et al, 2009 (WA09), ?CO2 only Nighingale et al, 2000 empirical fit to dual tracer data (NG00). Wanninkhov, 1992 (WA92). Liss and Merlivat, 1983 (LM83). set normalize to schmidt number value e.g. 660 to compare with other kw curves.

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).

Wanninkhof, R. Relationship between wind speed and gas exchange over the ocean revisited. Limnol. Oceanogr. Methods 12, 351-362 (2014).

Wanninkhof, R., Asher, W. E., Ho, D. T., Sweeney, C. & McGillis, W. R. Advances in Quantifying Air-Sea Gas Exchange and Environmental Forcing. Ann. Rev. Mar. Sci. 1, 213-244 (2009).

Nightingale, P. D. et al. In situ evaluation of air-sea gas exchange parameterizations using novel conservative and volatile tracers. Global Biogeochem. Cycles 14, 373-387 (2000).

Wanninkhof, R. Relationship between wind speed and gas exchange over the ocean. J. Geophys. Res. 97, 7373 (1992).

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.