QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 06 Aug 2020 Station : Nelson Latitude: 41 16.0S Country : New Zealand Longitude: 173 16.0E JASL # : 077A Time Meridian: 180E (GMT + 12 hr) GLOSS # : none Originator #: 077 NODC #: 34171301 Contributor : Land Information New Zealand Lambton House 160 Lambton Quay PO Box 5501 Wellington, New Zealand Originator : local port authority Original Data: digital Instrmnt Type: DSIR (NZ) Kainga pressure transducer, Campbell CR10 data logger Digitzd Intvl: operator selective, normally 5 minutes Present Data : Hourly, daily, and monthly values obtained by: Hourly : manual extraction of hourlies from digital record Daily : 119-point convolution filter (Bloomfield, 1976) centered on noon applied to the hourly data with respective periods of the 95, 50, and 5% amplitude points at 124.0, 60.2, and 40.2 hours Monthly: Simple average of all daily values; calculated if 7 or fewer days are missing Span of data : 30 Jun 1984 - 31 Dec 2019 Gaps > 1 mon : 30 Apr 1985 - 30 Apr 1987;31 Oct 1988 - 23 Feb 1996 02 Dec 1996 - 19 Feb 1997;03 Sep 1998 - 22 Oct 1998 01 Nov 1998 - 23 Dec 1998;06 Mar 1999 - 18 May 1999 23 Mar 2000 - 13 Sep 2000;27 Dec 2000 - 20 Jun 2001 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1984-2019 Refernce Levl: The sea level heights are referred to the Tide Gauge Zero (TGZ): TGZ is 5.772 m below B.M. N1 (LINZ code AC4T), a stainless steel pin set in the front steps to the old brick building in Wakefield Quay, known as Anchor House. Comment : The daily and monthly values do not show any obvious shifts or trends. Data are relative sea level. This means any vertical changes of the land are included in this time series. Data received at JASL in July 2020 replaces JASL updates made in 2019. LINZ has made a re-assessment of the Kaikoura earthquake of 13 Nov 2016 and its influence on vertical land movement. The JASL update made in 2019 had added 0.021 m to 11/2016-2018 data as received from LINZ. The JASL update made in 2020 added 0.039 m for 12Z 13 Nov 2016 - end of record from the original data received from LINZ. For more information see LINZ. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1984 50 none (04)214-(00)215 none (05)222-(20)222 (17)288-(03)289 (14)306-(01)307 (05)334-(19)334 1985 31 85-92,120-365 (01)104-(20)104 none 1986 0 1-365 none none 1987 66 1-120,183-186 (08)144-(22)144 none (07)194-(21)194 (06)196-(19)196 (21)266-(05)267 (23)358-(09)359 1988 83 297-299,305-366 (23)050-(13)051 none (20)185-(05)186 (08)227-(23)227 1989 0 1-365 none none 1990 0 1-365 none none 1991 0 1-365 none none 1992 0 1-366 none none 1993 0 1-365 none none 1994 0 1-365 none none 1995 0 1-365 none none 1996 77 1-54,337-366 (23)059-(10)060 none (12)247-(08)248 1997 78 1-50,154-181,348- none none 349,353-358 1998 71 65-67,95-98,246-295, (12)210-(20)210 none 305-357 (09)215-(22)215 (05)299-(19)299 (20)300-(03)301 (18)301-(07)302 (19)362-(03)363 1999 77 13-14,65-138,186- (06)177-(19)177 none 187,299-303,315-316, (21)347-(04)348 319-321,365 (12)358-(20)358 2000 48 1-5,21-22,29-33,43- (16)080-(11)081 312-362 45,83-257,362-366 (05)277-(20)277 2001 53 1-171,331-333 (07)208-(21)208 none (08)312-(23)312 2002 100 none (17)261-(10)262 none (11)282-(10)283 (11)322-(10)323 2003 100 none (02)067-(11)067 none 2004 100 none (09)338-(21)338 none 2005 100 none (22)182-(08)183 none 2006 97 95-101,181-186 (12)162-(11)163 none (12)187-(11)188 (02)208-(22)208 (11)332-(03)333 2007 98 43-50,275-278 none none 2008 100 none (21)021-(04)022 none 2009 100 none none none 2010 99 274-276 (03)118-(20)118 none 2011 94 333-355 (02)099-(09)099 none (04)200-(11)200 2012 100 none (04)045-(20)045 none (12)091-(11)092 (13)204-(11)205 2013 98 96-99,122-125,160- (13)126-(11)127 none 162 (12)128-(20)128 (23)335-(11)336 2014 99 144-145,340-341 none none 2015 100 none (12)075-(11)076 none (08)091-(19)091 (04)301-(00)302 (12)308-(11)309 2016 99 233-237 (06)314-(18)314 none 2017 98 57-60,167-170 (12)108-(11)109 none (14)311-(20)311 (12)345-(11)346 2018 100 none (12)111-(11)112 none (04)169-(11)169 2019 99 365 (12)013-(11)014 none