Compute depth below the surface (i.e. a positive number within the
water column) based on pressure and latitude. (Use
to get the vertical coordinate, which is negative within the water
either pressure (dbar), in which case
Latitude in degN or radians north of the equator.
indication of formulation to be used, either
eos="unesco" then depth is calculated from pressure using Saunders
and Fofonoff's method, with the formula refitted for 1980 UNESCO equation of
state (reference 1). If
the gsw package (references 2 and 3) is used.
Depth below the ocean surface, in metres.
Unesco 1983. Algorithms for computation of fundamental properties of seawater, 1983. Unesco Tech. Pap. in Mar. Sci., No. 44, 53 pp.
IOC, SCOR, and IAPSO (2010). The international thermodynamic equation of seawater-2010: Calculation and use of thermodynamic properties. Technical Report 56, Intergovernmental Oceanographic Commission, Manuals and Guide.
McDougall, T.J. and P.M. Barker, 2011: Getting started with TEOS-10 and the Gibbs Seawater (GSW) Oceanographic Toolbox, 28pp., SCOR/IAPSO WG127, ISBN 978-0-646-55621-5.
Other functions that calculate seawater properties:
d <- swDepth(10, 45)
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