NELSON

Documentation added 1993-07-12

Port Nelson 690/071 RLR(1987) is 10.5m below BM N1

Documentation added 2003-01-17

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 2008-10-01

Full dataset for Nelson 1984-2007 received from Glen Rowe at LINZ 01/10/08.

Documentation added 2010-10-18

From information received from Glen Rowe at Linz the datum history is as follows: Up to 1994 TGZ was 5.773m below N1 From 1994 TGZ is 5.775m below N1

Documentation added 2016-07-13

PSMSL has queried the apparent 'jump' in the Nelson dataset between the data for 2012/2013. However, enquiries by LINZ to the cause of this have been inconclusive.

Documentation added 2018-06-28

The Kaikoura earthquake at 23:02 on 13th November 2016 impacted on a number of stations in the central part of New Zealand. Because of this the hourly values for several stations from 14th November 00:00hrs have been adjusted by LINZ. For station Nelson the adjustment is -0.021m.

Documentation added 2020-08-25

The adjustment due to the Kaikōura earthquake of 2016 has been removed as relative sea level series should include land movement. LINZ now estimate the land movement to be -0.039m

Documentation added 2021-08-23

A revised copy of the New Zealand data values for Nelson has been received from the data supplier the Land Information New Zealand (LINZ). The revised data begins from 2014. This exercise has been carried out to correct some anomalies with the high frequency data.
Adjustment has also been applied to the data to account for the Kaikoura earthquake by creating a new datum TGZ December 2016 5.736m below benchmark N 1.
Consequently the Metric data has had the effect of Kaikoura removed but the effect of the earthquake is still evident in the RLR data.