oce (version 0.2-1)

swDepth: Water depth

Description

Compute depth from pressure and latitude.

Usage

swDepth(pressure, latitude=45, degrees=TRUE)
swZ(pressure, latitude=45, degrees=TRUE)

Arguments

pressure

either pressure [dbar], in which case lat must also be given, or a ctd object, in which case lat will be inferred from the object.

latitude

Latitude in $^\circ$N or radians north of the equator.

degrees

Flag indicating whether degrees are used for latitude; if set to FALSE, radians are used.

Value

• For swDepth, depth below the ocean surface, in metres. For swZ, the negative of the depth, i.e. the distance above the surface.

Details

Depth is calculated from pressure using Saunders and Fofonoff's method, with the formula refitted for 1980 UNESCO equation of state (UNESCO, 1983).

Check value: 9712.653 m for 10,000 dbar at 30 deg latitude.

References

Unesco 1983. Algorithms for computation of fundamental properties of seawater, 1983. Unesco Tech. Pap. in Mar. Sci., No. 44, 53 pp.

Examples

d <- swDepth(10, 45)