QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 23 Jul 2020 Station : Port Chalmers Latitude: 45 49.0S Country : New Zealand Longitude: 170 39.0E JASL # : 669A Time Meridian: 180E (GMT + 12 hr) GLOSS # : none Originator #: 030 NODC #: 34175001 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: unconfirmed 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 : 11 Jun 1985 - 30 Dec 2019 Gaps > 1 mon : 01 Sep 1986 - 30 Nov 1986;30 Sep 1987 - 11 Dec 1995 12 Nov 1996 - 01 Aug 1997;23 Aug 1998 - 28 Oct 1998 20 Oct 2013 - 05 Dec 2013 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1985-2019 Refernce Levl: The sea level heights are referred to the Tide Gauge Zero (TGZ): TGZ is 3.816m below Pin 1 SO 17533 (LINZ code DR0F), a stainless steel pin set in concrete under an asphalt and white tile cover immediately to the left of the steps to the Port Chalmers Museum (ex Post Office building). 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 ---- --- -------------------- --------------- -------------------- 1985 45 203-205,207-214,230- (18)227-(01)228 none 233,251-259,300-309, (14)279-(10)280 347-350,354-363,365 (12)338-(22)338 1986 58 1-5,9-17,47-50,59- (08)063-(03)064 none 61,67-68,72-84,102- (01)216-(22)216 104,145-150,155-167, 170-171,192-194,197- 203,208-212,244-338, 364-365 1987 68 1-2,40-43,120-123, (14)138-(04)139 none 127-134,171-172,246- (08)160-(03)161 252,257-261,273-365 (03)197-(01)198 (13)244-(04)245 1988 0 1-366 none none 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 5 1-345,361-366 none none 1996 67 21-23,34-42,47-50, (17)105-(02)106 none 74-77,85-86,90-95, (15)166-(23)166 97-100,126-128,171- (04)254-(02)255 176,184-209,211-213, 227-229,271-272,277- 284,286-288,317-366 1997 40 1-213,240-245,258- (00)232-(11)232 none 260,322-324 1998 74 151-153,192-193,235- (00)054-(12)054 none 301,305-306,311-315, (22)104-(20)105 348-365 (07)302-(00)303 (16)307-(02)308 (07)308-(19)308 1999 80 1-7,13-19,49-59,61- (07)032-(01)033 none 67,91-97,111-112, (14)048-(01)049 117-119,141-144,155- (23)199-(20)200 160,167-170,189-194, (20)250-(09)251 207-225 2000 100 none none none 2001 100 none none none 2002 100 none none none 2003 100 none none none 2004 99 304-305,329-330 none none 2005 100 none (14)234-(01)235 none 2006 100 none (07)200-(04)201 none 2007 100 none (00)140-(21)140 none 2008 100 none none none 2009 100 none none none 2010 100 none none none 2011 100 none none none 2012 100 none none none 2013 87 293-339 none none 2014 100 none none none 2015 100 none none none 2016 100 none none none 2017 100 none none none 2018 98 7-17 none none 2019 99 164-167 none none