QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 13 Jul 2017 Station : Stornoway, Hebrides Latitude: 58 12.5N Country : United Kingdom Longitude: 006 23.3W JASL # : 295A Time Meridian: 000E (GMT) GLOSS # : 238 Originator #: 238 NODC #: 75008601 Contributor : Tide Gauge Inspectorate (TGI), National Oceanography Centre Proudman Oceanographic Laboratory 6 Brownlow Street Liverpool L69 3GP United Kingdom Originator : Environment Agency Anglian Regional Office Kingfisher House Goldhay Way, Orton Goldhay Peterborough Cambridgeshire, PE2 5ZR Original Data: 1976-1981: analog 1992-: digital Instrmnt Type: 1975- Float gauge and chart recorder 1982- Ott pneumatic with punch tape recorder 1985 DATARING system, pneumatic bubbler gauge 1993-: Digiquartz pressure sensor (bubbler) Digitzd Intvl: 1976-1992: spot hourly 1993-: 15 minutes Present Data : Hourly, daily, and monthly values obtained by: Hourly : 1976-1992: spot 1993-:filtered (3-pt Hanning) 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 : 01 Jan 1976 - 31 Dec 2016 Gaps > 1 mon : 01 Jan 1977 - 31 Dec 1977;25 Jun 1979 - 26 Jul 1979 01 Jan 1982 - 18 Feb 1983;30 Jul 1983 - 21 Apr 1985 03 Apr 1991 - 13 May 1991;07 Dec 1994 - 02 Mar 1995 28 Apr 2004 - 08 Jun 2004;26 Jan 2008 - 21 May 2008 30 Sep 2010 - 07 Nov 2010;16 Feb 2011 - 11 Mar 2012 03 Dec 2014 - 05 Jan 2015;23 Mar 2015 - 17 Jul 2015 19 Jul 2015 - 15 Sep 2015;02 Oct 2015 - 06 Jan 2016 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1976-2016 Refernce Levl: All data now refer to Admiralty Chart Datum (ACD). The Data Originators have applied the following: Period Correction applied (m) ----------------------- ---------------------- 01/01/1976 - 20/08/1976 -2.86 20/08/1976 - 31/12/1976 -2.51 01/01/1978 - 29/05/1978 -2.51 29/05/1978 - 31/12/1978 -2.98 01/01/1979 - 31/12/1979 -3.043 01/01/1980 - 01/01/1980 -3.06 Tide gauge benchmark (TGBM) description: Ordnance Survey Benchmark bolt E side of No. 2 Wharf (Bank Street Wharf) Ordnance Survey grid reference NB 4228 3264, 3.658 m above Ordnance Datum Local (local datum correlated to pre 1900 assumed mean sea level). Benchmark relationships: Tide gauge zero (TGZ) = Admiralty Chart Datum (ACD) TGZ = 2.71m below Local Ordnance Datum Comment : The data have been quality controlled by the British Oceanographic Data Centre. There are gaps in the files for 1976 and 1978 where the datum of the gauge was reset at site. The datum should be considered suspect for these years. National Tidal and Sea Level Facility Licence Agreement Condition of Use 1) Users must not pass on the data to third parties, but instead direct interested parties to the NTSLF Web site. 2) BODC, NERC and the Environmental Agency give no warranty as to the accuracy of the data or as to the suitability of the data for their intended use and shall not be responsible for any errors or omissions, or for the use of, or results obtained from this information. 3) Publications resulting from the use of the data shall include acknowledgement to BODC and the Environmental Agency (Suggested text "The data were supplied by the British Oceanographic Data Centre as part of the function of the National Tidal and Sea Level Facility, hosted by the Proudman Oceanographic Laboratory and funded by the Environmental Agency and the Natural Environmental Research Council".) 4) The recipient shall: a) Inform BODC of the outputs to which the data have contributed, e.g., references to scientific publications or reports, b) Offer to BODC, if requested and without charge, a copy of any value added data set or product derived from the data, c) Inform BODC of any inaccuracies or errors detected in the data. 5) BODC is entitled to terminate the licence at any time if the conditions of use are not observed and may revoke privileges in furutre if there is unauthorised redistribution of the data. 6) All intellectual property rights in the data and information supplied to you whether owned by NERC or third parties (e.g. the Environmental Agency) will continue to be owned by the respective parties. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1976 99 250-251 none 2-6,248-249,295-300 1977 0 1-365 none none 1978 100 none none none 1979 92 176-207 none none 1980 100 none none none 1981 100 none none none 1982 0 1-365 none none 1983 29 1-49,211-365 none none 1984 0 1-366 none none 1985 68 1-111,179-184 (09)275-(23)275 none (12)324-(00)325 1986 100 none none none 1987 99 111-113 (08)119-(22)119 none 1988 93 235-259 (23)201-(22)202 none 1989 99 153-156 (20)092-(19)093 none (05)255-(19)255 1990 97 338-348 none none 1991 89 93-133 (12)163-(11)164 none 1992 99 7-9,357-358 none none 1993 99 23-25,145-147 none none 1994 90 171-173,179-186, (23)101-(10)102 none 341-365 (01)126-(14)126 (01)319-(12)319 1995 72 1-61,66-67,156-159, (13)100-(12)101 none 207-215,251-256 (17)316-(08)317 1996 90 89-93,95-102,219- (18)304-(12)305 none 226,254-257,352-366 (22)323-(15)324 1997 95 55-56,189-191,217- (06)224-(20)224 none 219,343-349,357-363 (07)231-(20)231 1998 98 37-41,168-174,251- (20)057-(08)058 none 254,275-280 (23)092-(18)093 1999 81 15-19,40-51,65-68, (09)138-(21)138 none 97-103,141-145,169- 174,182-187,208-209, 213-219,222-226,320- 334,357-363 2000 97 9-10,112-116,148-152 (00)119-(07)119 none 2001 97 86-92,289-295 none none 2002 100 none none none 2003 94 235-254,314-316 none none 2004 82 119-160,187-189,271- (03)076-(16)076 none 275,287-294,334-341, 363-366 2005 92 1-5,24-25,124-126, (05)040-(12)040 none 264-266,269-271, 273-290 2006 99 107-109 none none 2007 99 353-357 none none 2008 68 26-142 none none 2009 100 none none none 2010 89 273-311 none none 2011 12 34-36,47-365 none none 2012 81 1-71 none none 2013 98 222-231 none none 2014 85 310-336,337-365 none none 2015 12 1-5,7-30,48-77,82- (03)035-(11)035 none 198,200-258,375-365 (15)035-(23)035 (04)036-(11)036 (16)036-(00)037 (05)037-(13)037 (17)037-(00)038 (05)038-(13)038 (18)038-(01)039 (06)039-(13)039 (18)039-(01)040 (06)040-(14)040 (07)041-(14)041 (00)047-(22)047 (02)078-(10)078 (14)078-(22)078 (02)079-(11)079 (15)079-(23)079 (04)080-(12)080 (16)080-(23)080 (04)081-(12)081 (17)081-(01)082 (15)198-(00)199 (04)199-(02)200 (05)200-(14)200 (17)274-(02)275 2016 99 1-6 none none