New data from John Hannah added 17/01/03 which supercedes old data. New data does not have any missing days information. Old data has been backed up.
Documentation added 2003-01-17
New data from John Hannah was for Auckland II, Dunedin II, Lyttelton II and Wellington II.
Documentation added 2005-10-17
There is a new John Hannah paper referring to New Zealand data for Wellington, Dunedin, Lyttelton and Auckland. The reference is: "An updated analysis of long-term sea level change in New Zealand." Geophysical Research Letters, V31, L03307, doi:10.1029/2003GL019166 (2004).
Documentation added 2021-02-03
As well as adding 2020 data the value for March 2018 has also been revised.
National Tidal Centre Bureau of Meteorology PO Box 421 Kent Town 5071 South Australia