The original idea of using the tide gauge sea levels to produce a datum for altimetric sea surface heights data arose in conversations with Professor Klaus Wyrtki nearly 10 years ago, and the refinements to the technique since our original efforts benefitted greatly from many talks with him. The work described above has also been much improved by conversations with my colleagues on the TOPEX/Poseidon Science Working Team, and significant improvements were made following comments by two anonymous reviewers. Sea level data were obtained from the University of Hawaii Sea Level Center operated by Dr. Mark Merrifield, and assistance with data processing was provided by Shikiko Nakahara and David Stone at the University of Hawaii. This work was supported by NASA through the Jet Propulsion Laboratory as part of the TOPEX Altimeter Research in Ocean Circulation Mission.
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