QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 15 Sep 2020 Station : Yakutat,AK Latitude: 59 32.9N Country : USA Longitude: 139 44.1W JASL # : 570A Time Meridian: 135W (GMT - 9 hr) GLOSS # : none Originator #:9453220 NODC #: 75139901 Contributor : National Ocean Service (NOS) National Ocean. and Atmos. Administration (NOAA) N/OES22 SSMC4, STATION 7109 1305 East West Highway Silver Spring, MD. 20910-3233 Originator : same Original Data: unconfirmed; 1993+ digital Instrmnt Type: float/well system (1961-1992); Aquatrak acoustic gauge, NOAA Next Generation Water Level Measuring System (NGWLMS) (1993-) Digitzd Intvl: unconfirmed; 1993+ six-minute NGWLMS sampling is three-minute average Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot sampling 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 : 01 Jan 1961 - 31 Dec 2019 Gaps > 1 mon : 01 May 1964 - 05 Sep 1965;02 May 1967 - 01 Jul 1967 01 Feb 1971 - 01 Apr 1971;04 Nov 1972 - 24 Aug 1973 01 Jan 1978 - 27 Jun 1979;17 Sep 2008 - 18 Oct 2008 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1961-2019 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed bench marks. While standard mechanical or ADR instrument was the primary gauge, leveling calibration factors were applied monthly based on tide staff comparisons. Comment : The daily and monthly means reveal no apparent reference level changes or trends. Notable episodic events: 23-25 May 1960: Tsunami from S.C. Chile 28 Mar 1964: Tsunami from Alaska 11 Mar 2011: Tsunami from Japan CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1961 99 1 none none 1962 100 none none none 1963 100 none none none 1964 33 122-266 none none 1965 32 1-248 none 283-286 1966 100 none none 52,80,345 1967 84 122-182 none 334-335 1968 95 296-313 none 190-191,357-362 1969 99 83-85,86-88 none none 1970 100 none none 10,13,124-125,144, 159-160,256-262 1971 83 32-91,169-173 (13)167-(02)168 163-164 (09)168-(03)169 1972 76 190-193,195-207,244- none 250-274,293-298,309 250,274-283,309-366 1973 35 1-236,267-272 (00)313-(08)313 289 1974 98 106-107,110-116 (23)108-(20)109 124-127,192,198-202, 229,305-307,317 1975 100 none none 172-173,293-294 1976 97 113-122 none 20,93,98,162,325-329 1977 70 177-178,182-192,224- (04)181-(18)181 124-125,154-156,168- 226,244-257,275-278, (12)235-(10)236 169,174-176,235,238- 288-365 (15)236-(10)237 241,269-270 (18)238-(12)239 (19)240-(13)241 (07)242-(14)242 (20)243-(23)243 (06)270-(15)270 1978 88 1-13,15-18,335-365 none 45 1979 51 1-178 none none 1980 84 33-92 none none 1981 100 none none none 1982 100 none none 68,74,94-95,100-102 1983 100 none none none 1984 100 none none none 1985 100 none none 122-128 1986 100 none none none 1987 100 none none none 1988 100 none none 299-301 1989 100 none none none 1990 100 none none none 1991 100 none (11)162-(01)163 none 1992 100 none none none 1993 100 none none none 1994 99 51-55 none none 1995 100 none none none 1996 100 none (00)040-(08)040 none 1997 100 none none none 1998 100 none none none 1999 100 none (17)136-(01)137 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 253-255 2006 86 20-49,344-365 none none 2007 95 1-8,341-352 none none 2008 92 261-292 none none 2009 100 none none none 2010 100 none none none 2011 100 none none none 2012 100 none none none 2013 100 none none none 2014 100 none none none 2015 100 none none none 2016 100 none none none 2017 100 none none none 2018 100 none none none 2019 100 none none none