QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 09 Oct 2019 Station : Hakodate Latitude: 41 47.0N Country : Japan Longitude: 140 43.0E JASL # : 364A Time Meridian: 135E (GMT + 9 hr) GLOSS # : 088 Originator #: HK NODC #: 14141001 Contributor : Japan Meteorological Agency 1-3-4 Otemachi, Chiyoda-ku Tokyo, Japan Originator : Japan Meteorological Agency Original Data: analog Instrmnt Type: float/well: Fuess Digitzd Intvl: hourly Present Data : Hourly, daily, and monthly values obtained by: Hourly : hourly spot reading 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 Jun 1964 - 31 Dec 2018 Gaps > 1 mon : 30 Jun 1965 - 31 Dec 1966;31 Dec 1967 - 01 Dec 1968 02 Aug 1976 - 23 Oct 1976 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1964-2018 Refernce Levl: All data are levelled to fixed bench marks and the tide staff zero. Tide gauge benchmark (TGBM) description: BM Control - Japan Met. Agency Benchmark bolt inside tide gauge hut adjacent to stilling well Auxiliary benchmarks: Tide station BM 2.1106m above Tokyo Peil (1984) Benchmark relationships: Tide Gauge Zero (TGZ) = 1.404m below Tokyo Peil (Mean Sea Level of Tokyo Bay) TGZ = 3.606m below TGBM (from 1976 onwards) Comment : The daily or monthly means do not reveal any obvious reference level shifts. The timing of the hourly data is good. Legal Notice Regarding JMA Data http://www.jma.go.jp/jma/en/copyright.html (website refers to where data were downloaded from for input into the JASL) Copyright Notice The material on this website is protected by the Copyright Law of Japan and related international laws. Apart from any fair dealing for the purposes of study, research and other personal use, as permitted under the Copyright Law, no part of the material on this website may be reproduced, re-used or redistributed without notice to the Japan Meteorological Agency. Any quotation from the material requires indication of the source. The Japan Meteorological Agency does not warrant, guarantee or make any representations regarding the currency, correctness, accuracy, reliability or any other aspect of the characteristics or use of the information presented on this website. The user assumes all risk related to the use of the information contained. Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo 100-8122, Japan CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1964 50 none none none 1965 50 181-365 none none 1966 0 1-365 none none 1967 99 365 none 279-288 1968 0 1-366 none none 1969 99 335-339 (10)043-(04)044 132-140 (07)089-(01)090 (17)296-(00)297 1970 98 184-185,357-362 (06)286-(20)286 none (22)352-(12)353 1971 98 128-134,289-291 (15)337-(00)338 none (06)347-(02)348 1972 100 none none none 1973 100 none none none 1974 100 none (12)144-(00)145 none 1975 100 none none none 1976 78 215-297 none none 1977 100 none none none 1978 100 none none none 1979 99 287-289 none none 1980 100 none none none 1981 99 133-138 (20)234-(18)235 none 1982 100 none none none 1983 100 none none none 1984 100 none none none 1985 100 none none none 1986 100 none none none 1987 100 none none none 1988 100 none (01)169-(07)169 none 1989 100 none none none 1990 100 none none none 1991 100 none none none 1992 100 none none none 1993 100 none none none 1994 100 none none none 1995 100 none none none 1996 100 none none none 1997 100 none none none 1998 100 none 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 none none 2007 100 none none none 2008 100 none none none 2009 100 none none none 2010 100 none none none 2011 100 none none none 2012 99 25-26 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 99 365 none none