Today's instruments typically record in the ITS-90 scale, but some old
datasets will be in the IPTS-68 scale.
T90fromT68() converts from the
IPTS-68 to the ITS-90 scale, using Saunders' (1990) formula, while
T68fromT90() does the reverse. The difference between IPTS-68 and
ITS-90 values is typically a few millidegrees (see ‘Examples’), which
is seldom visible on a typical temperature profile, but may be of interest
in some precise work. Mostly for historical interest,
is provided to convert from the ITS-48 system to ITS-90.
Vector of temperatures expressed in the ITS-90 scale.
Temperature expressed in the IPTS-68 scale.
P. M. Saunders, 1990. The international temperature scale of 1990, ITS-90. WOCE Newsletter, volume 10, September 1990, page 10. http://www.nodc.noaa.gov/woce/wdiu/wocedocs/newsltr/news10/contents.htm
Other functions that calculate seawater properties:
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