QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 03 Jan 2020 Station : Ny-Alesund Latitude: 78 56.3N Country : Norway Longitude: 11 56.3E JASL # : 823A Time Meridian: 015E (GMT + 1 hr) GLOSS # : 345 Originator #: NODC #: 17018101 Contributor : Norwegian Hydrographic Services (NHS) Oceanographic Group PO Box 60 N-4011 Stavanger NORWAY Data prior to 02 Sep 1992 provided by the Norwegian Polar Institute Originator : same Original Data: analog and digital Instrmnt Type: 1976 - 01 Sep 1992: pressure tide gauge 02 Sep 1992: Scan-Matic gauge 05 Dec 2000: Sutron gauge Digitzd Intvl: hourly and 10 minute (pressure and Sutron) Present Data : Hourly, daily, and monthly values obtained by: Hourly : Hanning 3-pt filter centered on the hour 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 Aug 1976 - 31 Dec 2018 Gaps > 1 mon : 01 Jan 1983 - 31 Dec 1983;22 Apr 1985 - 15 Jul 1985 13 May 1986 - 31 Jul 1986;18 Apr 1987 - 19 Aug 1987 13 Aug 1988 - 21 Aug 1989 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : unconfirmed Distribution : 1976-2018 Refernce Levl: Historic data are relative to Tide Gauge Zero (TGZ) TGBM, Fundamentalpunkt for Svalbard Sikringsmerke BM, bolt NW of airport: 22.723m above TGZ: 15.400m below TGBM TGZ = Chart Datum + 922 mm Comment : The timing quality is good throughout the series. The 2020-01 JASL update replaces 2007-2014, after NHS performed systematic error corrections. Use of the data is licensed through Creative Commons Attribution 4.0 international (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/deed.en CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1976 34 none none none 1977 96 173-179,181-185, none none 189-193 1978 99 313-317 (23)219-(22)220 none 1980 96 7-16,195-200 (23)181-(22)182 none 1981 100 none (23)157-(22)158 none 1982 99 191-193 none none 1983 0 1-365 none none 1984 99 195-197 none none 1985 77 81-83,112-196 (23)318-(22)319 none 1986 78 133-212 none none 1987 67 108-231 (23)031-(22)032 none (23)035-(22)036 1988 62 226-266 none none 1989 36 1-233 none none 1990 100 none none none 1991 99 226-228 none none 1992 100 none none none 1993 98 329-335 none none 1994 100 none none none 1995 98 271-276,323-325 none none 1996 98 255-263 none none 1997 99 72-76 none none 1998 99 265-267 none none 1999 100 none none none 2000 100 none none none 2001 100 none none none 2002 100 none none none 2003 100 none none none 2004 100 none none none 2005 100 none none none 2006 100 none (16)365-(23)365 none 2007 98 78-81,362-365 none 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 99 364-365 (12)174-(07)175 none 2014 100 none none none 2015 100 none none none 2016 100 none none none 2017 100 none none none 2018 99 95-96 none none