Aburatsu (Japan) Site History

History Summary

Station Name Aburatsu
Country Japan
Latitude 31° 34.0' N
Longitude 131° 25.0' E
GLOSS No. 082
Contributor 1961-1986 TOGA Sea Level Center,
1987-2009 Japan Meteorological Agency.
Instrument Type FUESS (1961-1972)
LFT-4 (1973-1999)
Fuess float operated gauge (2001-2005)
Acoustic Gauge (2006-2009)
Site of Gauge  
Observational Period 1961 - 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 BM 2.8816 m above Tokyo Peil (1985).

Benchmark Relationships

Year Standard Mark (TGBM)
above Datum Line (TGZ)
Standard Mark (TGBM)
above Tokyo Peil (TP)
TGZ below TP
1959 onwards 6.643 5.061 -1.582
2001-2002 6.643 5.053 -1.59
2003-2009 6.643 5.234 -1.409

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
1961 100.0 96.6 1961-01-01 00:00 to 1961-12-31 23:00 60 None 2212,2382-2679 ASLVZZ01
1962 100.0 100.0 1962-01-01 00:00 to 1962-12-31 23:00 60 None None ASLVZZ01
1963 100.0 100.0 1963-01-01 00:00 to 1963-12-31 23:00 60 None None ASLVZZ01
1964 100.0 100.0 1964-01-01 00:00 to 1964-12-31 23:00 60 None None ASLVZZ01
1965 100.0 100.0 1965-01-01 00:00 to 1965-12-31 23:00 60 None None ASLVZZ01
1966 100.0 100.0 1966-01-01 00:00 to 1966-12-31 23:00 60 None None ASLVZZ01
1967 100.0 100.0 1967-01-01 00:00 to 1967-12-31 23:00 60 None None ASLVZZ01
1968 97.9 92.1 1968-01-01 00:00 to 1968-12-31 23:00 60 3185-3241,5206-5235,5918-5954,6572-6628 5236-5917 ASLVZZ01
1968 93.3 100.0 1969-01-01 00:00 to 1969-12-31 23:00 60 1391-1543,2211-2283,2604-2649,4621-4664,4962-5066,6526-6561,7048-7082,7390-7418, 7700-7762 None ASLVZZ01
1969 93.3 100.0 1969-01-01 00:00 to 1969-12-31 23:00 60 1391-1543,2211-2283,2604-2649,4621-4664,4962-5066,6526-6561,7048-7082,7390-7418, 7700-7762 None ASLVZZ01
1970 98.4 100.0 1970-01-01 00:00 to 1970-12-31 23:00 60 22-126,2632-2669 None ASLVZZ01
1971 100.0 98.6 1971-01-01 00:00 to 1971-12-31 23:00 60 None 7050-7172 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 98.0 100.0 1982-01-01 00:00 to 1982-12-31 23:00 60 2788-2958 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 1986-12-31 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 100.0 100.0 1988-12-31 15:00 to 1989-12-31 14:00 60 None None ASLVZZ01
1990 100.0 100.0 1989-12-31 15:00 to 1990-12-31 14:00 60 None None ASLVZZ01
1991 100.0 100.0 1990-12-31 15:00 to 1991-12-31 14:00 60 None 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 100.0 100.0 1995-12-31 15:00 to 1996-12-31 14:00 60 None None ASLVZZ01
1997 100.0 100.0 1996-12-31 15:00 to 1997-12-31 14:00 60 None None 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 99.9 100.0 2001-12-31 15:00 to 2002-12-31 14:00 60 7597-7599,7828-7834 None ASLVZZ01
2003 99.9 100.0 2002-12-31 15:00 to 2003-12-31 14:00 60 6082-6090 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 99.9 100.0 2005-12-31 15:00 to 2006-12-31 14:00 60 8101-8103 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 7763-7767 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)
1961 1961-01-13 13:00 to 1961-01-14 02:00,
1961-02-13 16:00 to 1961-02-14 01:00,
1961-02-15 17:00 to 1961-02-16 01:00,
1961-02-16 08:00 to 1961-02-17 04:00,
1961-08-05 14:00 to 1961-08-06 01:00,
1961-10-02 04:00 to 1961-10-03 03:00,
1961-10-19 08:00 to 1961-10-20 02:00,
1961-10-25 10:00 to 1961-10-26 01:00and
1961-11-26 07:00 to 1961-11-27 01:00.
1962 1962-05-16 15:00 to 1962-05-16 22:00.
1963 1963-06-10 10:00 to 1963-06-11 03:00,
1963-07-25 09:00 to 1963-07-25 17:00 and
1963-07-26 10:00 to 1963-07-26 17:00.
1964 1964-03-25 00:00 to 1964-03-25 07:00,
1964-04-01 10:00 to 1964-04-02 02:00,
1964-04-05 03:00 to 1964-04-06 01:00,
1964-06-28 07:00 to 1964-06-29 01:00,
1964-09-05 16:00 to 1964-09-06 01:00,
1964-09-07 17:00 to 1964-09-08 01:00,
1964-09-09 16:00 to 1964-09-10 01:00,
1964-10-14 15:00 to 1964-10-15 01:00,
1964-10-31 19:00 to 1964-11-01 01:00,
1964-11-02 19:00 to 1964-11-03 01:00 and
1964-12-07 02:00 to 1975-12-08 01:00.
1965 1965-04-20 00:00 to 1965-04-20 07:00,
1965-05-10 04:00 to 1965-05-11 01:00,
1965-06-07 07:00 to 1965-06-08 01:00 and
1965-06-09 03:00 to 1965-06-10 01:00.
1968 1968-08-03 15:00 to 1968-08-04 03:00 and
1968-09-24 09:00 to 1968-09-25 03:00.
1969 1969-02-12 09:00 to 1969-02-13 01:00 and
1969-09-05 07:00 to 1969-09-06 01:00.
1978 1978-10-25 10:00 to 1978-10-25 19:00
1980 1980-02-06 15:00 to 1980-02-07 06:00