QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Hosojima Latitude: 32 25.0N Country : Japan Longitude: 131 41.0E JASL # : 358A Time Meridian: 135E (GMT + 9 hr) GLOSS # : none TOGA #: none NODC #: 13132101 Contributor : Japan Meteorological Agency 1-3-4 Otemachi, Chiyoda-ku Tokyo, Japan Originator : Japan Meteorological Agency Original Data: analog Instrmnt Type: float and stilling well gauge 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 1933 - 31 Dec 1975 Gaps > 1 mon : 16 Sep 1945 - 24 Oct 1945;03 Jun 1946 - 29 Jul 1946 12 Aug 1946 - 14 Sep 1946;31 Dec 1965 - 31 Dec 1970 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1933-1975 Refernce Levl: All data are levelled to fixed bench marks and the tide staff zero. Comment : The daily or monthly means do not reveal any obvious reference level shifts. The hourly residual plots show considerable periodic fluctuations (tidal periodicity) from 1950-8/1957. There appears to be timing errors of about +/- 20 minutes. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1933 100 none none none 1934 100 none none 13-18,342-343 1935 99 193-198 none 5-7 1936 100 none none 85 1937 98 49-55 none 253 1938 100 none none none 1939 100 none none none 1940 97 269-273,304-311 none none 1941 100 none none none 1942 98 165-172 none 285 1943 100 none none 361-364 1944 100 none none 130-132,188-191 1945 88 248-255,259-297 none 337-338 1946 66 109-140,154-210,224- (16)103-(13)104 286-288,300-302 257,362-365 1947 87 77-81,92-112,160- (02)045-(11)045 36-39,124,314 164,192-208,240-243 1948 97 165-170,355-362 (05)027-(17)027 none (04)101-(15)101 1949 99 264-266 (13)012-(01)013 171,312,324 (03)154-(15)154 1950 98 253-260 none see comment above 1951 100 none (21)272-(08)273 see comment above 1952 100 none none see comment above 1953 99 273-274,284-286 none see comment above 1954 99 213-214 none see comment above 1955 95 16-20,31-38,52-54, none see comment above 59-65,344-345 1956 99 31-35 (15)018-(07)019 see comment above 1957 100 none none see comment above 1958 100 none none none 1959 100 none none none 1960 99 159-164 (04)148-(00)149 none 1961 99 188-190 none none 1962 100 none none none 1963 99 150-152,236-239 (12)217-(06)218 none 1964 100 none none none 1965 99 209-210,279-280,365 none 16-19 1966 0 1-365 none none 1967 0 1-365 none none 1968 0 1-366 none none 1969 0 1-365 none none 1970 0 1-365 none none 1971 100 none none 26-28 1972 99 301-304 none none 1973 100 none (11)051-(02)052 none 1974 100 none (14)334-(23)334 none 1975 99 270-273,365 (03)281-(23)281 none