QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 30 Jul 2020 Station : Bluff Latitude: 46 36.0S Country : New Zealand Longitude: 168 21.0E JASL # : 072A Time Meridian: 180E (GMT + 12 hr) GLOSS # : 129 Originator #: 072 NODC #: 34166801 Contributor : For 1984-1988: Royal New Zealand Navy - Hydrographic Office Burns Avenue Takapuna, Auckland, New Zealand For 1997-: Land Information New Zealand Lambton House 160 Lambton Quay PO Box 5501 Wellington, New Zealand Originator : South Port New Zealand Limited PO Box 1 Bluff, New Zealand Original Data: digital Instrmnt Type: 1984-1988: DSIR (NZ) Kainga pressure transducer, Campbell CR10 data logger 1997-: Milltronic "The Probe" ultrasound probe, there is not a stilling well but it is fitted in a sheltered location. Logged with Datataker DT50 Digitzd Intvl: 1984-1988: operator selective, normally 5 minutes 1997: unconfirmed 1998-: averaging period of 1 minute sampled every five minutes Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot hourly 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 Sep 1984 - 31 Dec 2019 Gaps > 1 mon : 25 Oct 1985 - 30 Nov 1985;01 Dec 1987 - 31 Dec 1987 31 Jul 1988 - 31 Aug 1988;31 Dec 1988 - 28 Nov 1997 27 Feb 1999 - 07 Aug 1999;05 Jul 2001 - 08 Aug 2001 31 Jan 2014 - 06 Mar 2014 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 zero point assigned to the tide gauge, which is 8.620 m below Bluff Fundamental Bench Mark (LINZ code ABCC), a stainless pin in concrete under iron cover at south east corner of intersection of Lee and Barrow Streets. Other relationships: Tide Gauge Zero = 4.883 m below BM Z 59/1 (LINZ code ABCK), a copper pin in the centre of bottom step, west side of the War Memorial Monument, Marine Parade. Comment : The daily and monthly values do not show any obvious shifts or trends. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1984 22 330-341,350-352 none none 1985 83 43-60,273-279,286- none 203,273 289,298-334 1986 97 61-68,185-188, (03)121-(23)121 11-12,39-40,115-118, 249-250 (02)181-(20)181 294 (17)362-(12)363 1987 89 241-243,248-249,257- none 50-52,57-60,80-81, 260,271-273,335-365 220-224 1988 83 152-182,213-244,366 none 21-32,81-87,120,130 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 0 1-366 none none 1997 9 1-332 none none 1998 95 347-365 none none 1999 50 1-9,35-46,58-219, (00)308-(20)308 none 292-296 2000 100 none none none 2001 81 67-77,134-139,141- (17)235-(04)236 none 148,186-220,233-235, 307-314,355-358 2002 81 116-120,130-144,163- none none 165,177-186,205-213, 220-234,266-270,300- 311,362-365 2003 99 184-186 (19)163-(05)164 none 2004 100 none (08)251-(21)251 none 2005 100 none (12)365-(23)365 none 2006 93 1-4,71-85,303-313 none none 2007 96 92-106 (23)173-(22)174 none (06)175-(21)175 2008 100 none none none 2009 100 none none none 2010 73 253-256 none none 2011 53 1-174 (11)365-(23)365 none 2012 93 44-69 none none 2013 99 364-365 none none 2014 90 1-3,31-65 none none 2015 100 none none none 2016 99 212-216 none none 2017 100 none none none 2018 100 none none none 2019 99 365 none none