QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 26 Aug 2019 Station : St. John's-B Latitude: 47 34.0N Country : Canada Longitude: 052 42.0W JASL # : 276B Time Meridian: 053W (GMT-3.5 hr) GLOSS # : 223 Originator #: 00905 NODC #: 74057201 Contributor : Marine Environmental Data Service Dept. of Fisheries and Oceans S12082-200 Kent St. Ottawa, Ontario CANADA K1A-OE6 Originator : Dept. of Fisheries Atlantic Tidal Section BIO, P.O. Box 1006 Dartmouth, N.S. CANADA B2Y 4A2 Original Data: digital Instrmnt Type: float/well gauge with secondary bubbler and pressure sensor; all utilizes the tidal acquisition telemetry system Digitzd Intvl: Jun/2000 - 15/Mar/2006: 15 minutes 15/Mar/2006 - : 1 minute Present Data : Hourly, daily, and monthly values obtained by: Hourly : three-point Hanning filter centered on the hour until 2001-2006, 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 : 02 Sep 1989 - 31 Dec 2018 Gaps > 1 mon : 08 Feb 1990 - 20 Mar 1990;24 Aug 1990 - 18 Oct 1990 03 Jan 2000 - 04 Mar 2000;27 Aug 2007 - 15 Nov 2007 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1989-2018 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. The primary benchmark is BM 76F27, a Geodetic Survey of Canada (GSC) tablet which is located horizontally in the SE foundation, 1.1m from south corner, 0.15m below brick siding of the St. John's Ministry of Transport depot building. Elevation 4.412m above CD. Comment : The series, St. John's-A (1935-1989) hourly data are relative to the local time zone (GMT-3.5 hours). After 02 Sep 1989, a new series, St. John's-B, is established relative to the same datum but with the time zone related to GMT, since 15-minute data were available for performing this time zone shift. Comparisons of daily means with altimeter data 1993-2018 suggests a stable reference level. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1989 33 none none none 1990 69 4-8,39-79,130-134, none none 144-152,236-297 1991 100 none none none 1992 100 none none none 1993 99 130-132 (08)151-(03)152 none 1994 100 none none none 1995 100 none (11)226-(03)227 234,254-255 1996 98 309-317 none none 1997 99 167-172 none none 1998 93 31-43,68-71,109-118, (21)123-(14)124 none 135-137 1999 99 132-136 none 54,262,293 2000 89 3-64,117-120, none none 138-140,143-144 2001 99 98-103 none none 2002 98 230-238 (23)342-(12)343 none 2003 96 63-71,77-83 (00)076-(11)076 none (09)209-(03)210 2004 100 none none none 2005 100 none none none 2006 94 309-321,323-335 none none 2007 74 118-128,239-319,322- none none 323,334-336 2008 99 169-171,288-291 none none 2009 99 191-193 (15)029-(00)030 none (14)291-(13)292 2010 99 320-321 (19)200-(16)201 none 2011 99 165-166,296-297, (04)313-(03)314 none 317-319 (16)320-(12)321 2012 99 186-187 (20)314-(15)315 none 2013 100 none none none 2014 99 167-169 none none 2015 100 none none none 2016 100 none (04)010-(03)011 none (04)096-(03)097 (04)173-(03)174 (04)236-(03)237 (04)292-(03)293 (04)313-(03)314 (04)334-(03)335 (19)340-(17)341 2017 100 none none none 2018 100 none (10)236-(17)236 none