QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 08 Oct 2019 Station : Maisaka Latitude: 34 41.0N Country : Japan Longitude: 137 37.0E JASL # : 356A Time Meridian: 135E (GMT + 9 hr) GLOSS # : none Originator #: MI NODC #: 13134701 Contributor : Japan Meteorological Agency 1-3-4 Otemachi, Chiyoda-ku Tokyo, Japan Originator : Japan Meteorological Agency Original Data: analog Instrmnt Type: float/well: FUESS (1968-1972,2000-2003+), LFT-4 (1973-1988), LFT-3 (1989-1990) 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 : 01 Jan 1968 - 31 Dec 2018 Gaps > 1 mon : 18 Nov 1970 - 24 Dec 1970;24 Dec 1976 - 31 Dec 1977 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1968-2018 Refernce Levl: All data are referred to a Datum Line (DL) associated with the tide gauge. The Standard Mark (SM) is physically located near the tide gauge and is directly leveled to a First Order Bench Mark of the Geographical Survey Institute. The SM is 5.675m above the DL. From information provided by the originators, 2000 mm was added to each data value of the original data from 1968-1981. Comment : The daily or monthly means do not reveal any obvious reference level shifts. Most questionable fluctuations are related to atmospheric or oceanographic events. 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 ---- --- -------------------- --------------- -------------------- 1968 100 none none 187-188,209,217-218, 251,266,293,323,328, 341,343-346,352-359 1969 99 315-319 none 5,8,14,16-17,20,29, 31-32,35-38,44,46- 50,64-65,67-68,74, 91-92,94,176-177, 180-181,185,234-235, 254-255,283-284 1970 88 86-89,308-311, (11)286-(08)287 5,30-31,113-114,199- 313-315,322-358 200,213 1971 97 193-203 none 188,242-243 1972 100 none (13)260-(04)261 11,44,107,196-197, 206 1973 96 187-201 none 2-5,106-107 1974 100 none none 188,237-238,242-243 1975 100 none none 22,234-235,278,280 1976 90 96-125,359-366 (15)291-(07)292 47,192-193,252-253 (15)358-(14)359 1977 1 1-365 none none 1978 97 128-135,187-189, none 258-259,274 190-191 1979 100 none none 83,89,98,292 1980 99 32-37 none 255-299 1981 99 328-329 none 109-110,173-174,234, 274,281,295 1982 100 none (15)207-(23)207 213-215,254-255,281, 333-334 1983 100 none none 164,228-229,271 1984 100 none none none 1985 100 none none 181-182 1986 100 none none 352 1987 100 none none 289-290 1988 100 none none 71-72,104,269-270 1989 100 none none none 1990 100 none none none 1991 100 none none none 1992 100 none (09)130-(00)131 none 1993 100 none none none 1994 100 none none none 1995 100 none none none 1996 100 none none none 1997 99 104-106 none none 1998 100 none none none 1999 99 231-236 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 (11)362-(01)363 none 2011 100 none none none 2012 100 none (01)018-(08)018 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