Kushiro (Japan) Site History

History Summary

Station name Kushiro
Country Japan
Latitude 42° 58.0' N
Longitude 144° 23.0' E
GLOSS No. 089
Contributor 1963-1986 TOGA Sea Level Center
1987-2009 Japan Meteorological Agency
Instrument Type FUESS (1963-1972)
LFT-4 (1973-1999)
Fuess float operated gauge (2001-2005)
Acoustic gauge (2006-2009)
Site of Gauge  
Observational Periods 1963 - present

Benchmarks

Reference Level

All heights have been referred to the station Tide Gauge Zero (TGZ) which is linked to fixed bench marks.

Tide Gauge Benchmark (TGBM) Description

Japan Meteorlogical Agency Benchmark bolt inside tide gauge hut, adjacent to stilling well

Auxiliary Benchmarks

Tide station Benchmark 2.4432m above Tokyo Peil (TP) (1981).

Benchmark Relationships

Year Standard Mark (TGBM)
above Datum Line (TGZ)
Standard Mark (TGBM)
above Tokyo Peil (TP)
TGZ below TP
1983 - 2000 3.978 2.455 -1.533
2001-2002 3.978 2.391 -1.587
2003-2004 3.978 2.083 -1.895
2005 3.978 2.070 -1.908
2006-2009 3.978 2.059 -1.919

Parameter Code

ASLVZZ01 - The elevation of the sea surface to a known datum, measured in metres.

Quality Assessment

The daily or monthly means do not reveal any obvious reference level shifts. Prior to 2001 most questionable fluctuations are related to timing problems with the gauge. Data spikes of about 10cm or less have not been corrected. In some years gaps in data have been replaced, details can be found in Replaced gaps table below.

Completeness index (CI)

Sea level data from Japan is processed for each year. Occasionally data is missing from the data sets, either because the data set does not cover the whole year or because data has been flagged null. The number of cycles in a year with no missing data is calculated (based on the sample interval and whether a leap year). The completeness index calculates what proportion of the data expected in a year is present and not flagged null.

Quality index (QI)

During processing cycles considered suspect within a series are flagged M. The quality index calculates what proportion of the data available is not considered suspect.

Yearly overview of data

Year CI (%) QI (%) Start and end date (UTC) Sampling interval
(minutes)
Missing Data
(cycle no.)
Suspect Data
(cycle no.)
Parameter Code
1963 99.9 99.7 1963-01-01 00:00 to 1963-12-31 14:00 60 None 7534-7560 ASLVZZ01
1965 100.0 100.0 1965-01-01 00:00 to 1965-12-31 23:00 60 None None ASLVZZ01
1966 100.0 99.6 1966-01-01 00:00 to 1966-12-31 23:00 60 None 7170-7207 ASLVZZ01
1967 100.0 100.0 1967-01-01 00:00 to 1967-12-31 23:00 60 None None ASLVZZ01
1968 98.7 100.0 1968-01-01 00:00 to 1968-12-31 23:00 60 34-147 None ASLVZZ01
1969 99.7 100.0 1969-01-01 00:00 to 1969-12-31 23:00 60 5160-5185 None ASLVZZ01
1970 99.7 100.0 1970-01-01 00:00 to 1970-12-31 23:00 60 None None ASLVZZ01
1971 99.7 100.0 1971-01-01 00:00 to 1971-12-31 23:00 60 6167-6196 None ASLVZZ01
1972 100.0 100.0 1972-01-01 00:00 to 1972-12-31 23:00 60 None None ASLVZZ01
1973 100.0 100.0 1973-01-01 00:00 to 1973-12-31 23:00 60 None None ASLVZZ01
1974 100.0 100.0 1974-01-01 00:00 to 1974-12-31 23:00 60 None None ASLVZZ01
1975 100.0 100.0 1975-01-01 00:00 to 1975-12-31 23:00 60 None None ASLVZZ01
1976 100.0 100.0 1976-01-01 00:00 to 1976-12-31 23:00 60 None None ASLVZZ01
1977 100.0 100.0 1977-01-01 00:00 to 1977-12-31 23:00 60 None None ASLVZZ01
1978 100.0 100.0 1978-01-01 00:00 to 1978-12-31 23:00 60 None None ASLVZZ01
1979 100.0 100.0 1979-01-01 00:00 to 1979-12-31 23:00 60 None None ASLVZZ01
1980 100.0 100.0 1980-01-01 00:00 to 1980-12-31 23:00 60 None None ASLVZZ01
1981 100.0 100.0 1981-01-01 00:00 to 1981-12-31 23:00 60 None None ASLVZZ01
1982 74.7 100.0 1982-01-01 00:00 to 1982-12-31 23:00 60 5824-8042 None ASLVZZ01
1983 100.0 100.0 1983-01-01 00:00 to 1983-12-31 23:00 60 None None ASLVZZ01
1984 100.0 100.0 1984-01-01 00:00 to 1984-12-31 23:00 60 None None ASLVZZ01
1985 100.0 100.0 1985-01-01 00:00 to 1985-12-31 23:00 60 None None ASLVZZ01
1986 99.9 100.0 1986-01-01 00:00 to 1986-12-31 14:00 60 None None ASLVZZ01
1987 100.0 100.0 1986-01-01 15:00 to 1987-12-31 14:00 60 None None ASLVZZ01
1988 100.0 100.0 1987-12-31 15:00 to 1988-12-31 14:00 60 None None ASLVZZ01
1989 99.9 100.0 1988-12-31 15:00 to 1989-12-31 14:00 60 3645-3652 None ASLVZZ01
1990 100.0 100.0 1989-12-31 15:00 to 1990-12-31 14:00 60 None None ASLVZZ01
1991 99.8 100.0 1990-12-31 15:00 to 1991-12-31 14:00 60 4988-5001 None ASLVZZ01
1992 100.0 100.0 1991-12-31 15:00 to 1992-12-31 14:00 60 None None ASLVZZ01
1993 100.0 100.0 1992-12-31 15:00 to 1993-12-31 14:00 60 None None ASLVZZ01
1994 100.0 100.0 1993-12-31 15:00 to 1994-12-31 14:00 60 None None ASLVZZ01
1995 100.0 100.0 1994-12-31 15:00 to 1995-12-31 14:00 60 None None ASLVZZ01
1996 100.0 99.0 1995-12-31 15:00 to 1996-12-31 14:00 60 None 1844-1869, 1956-1980, 3119-3153 ASLVZZ01
1997 100.0 98.6 1996-12-31 15:00 to 1997-12-31 14:00 60 None 35-81, 7567-7581, 7909-7941, 7983-8014 ASLVZZ01
1998 100.0 100.0 1998-01-01 00:00 to 1998-12-31 23:00 60 None None ASLVZZ01
1999 100.0 100.0 1999-01-01 00:00 to 1999-12-31 23:00 60 None None ASLVZZ01
2001 100.0 100.0 2000-12-31 15:00 to 2001-12-31 14:00 60 None None ASLVZZ01
2002 100.0 100.0 2001-12-31 15:00 to 2002-12-31 14:00 60 None None ASLVZZ01
2003 100.0 100.0 2002-12-31 15:00 to 2003-12-31 14:00 60 None None ASLVZZ01
2004 100.0 100.0 2003-12-31 15:00 to 2004-12-31 14:00 60 None None ASLVZZ01
2005 100.0 100.0 2004-12-31 15:00 to 2005-12-31 14:00 60 None None ASLVZZ01
2006 100.0 100.0 2005-12-31 15:00 to 2006-12-31 14:00 60 None None ASLVZZ01
2007 100.0 100.0 2006-12-31 15:00 to 2007-12-31 14:00 60 None None ASLVZZ01
2008 99.9 100.0 2007-12-31 15:00 to 2008-12-31 14:00 60 1226-1235 None ASLVZZ01
2009 100.0 100.0 2008-12-31 15:00 to 2009-12-31 14:00 60 None None ASLVZZ01

Replaced gaps

Year Replaced Gaps (UTC)
1969 1969-08-13 18:00 to 1969-08-14 00:00
1970 1970-05-30 10:00 to 1970-05-31 00:00 and
1970-08-13 04:00 to 1970-08-14 00:00
1971 1971-09-17 08:00 to 1971-09-17 14:00