St. Georges Island (Bermuda) Site History 1968-

History Summary

Station name Bermuda, St. Georges Is
Country U.K.
GLOSS No. 221
Contributor (1968-1995) NOAA/NOS, USA
Instrument type (1968-1989) Pneumatic bubbler gauge
(1991-present) Next Generation Water Level Measurement System, acoustic sensor
Site of Gauge (1968-1989) Bermuda Biological Station
(1991-present) Bermuda Esso Pier
Observational periods 1932 - present

Reference Level

All data are referred to Tide Gauge Zero and are linked into historic fixed benchmarks.

Tide Gauge Benchmark (TGBM) Description

BM Control BM is a standard disk set flush in top of wall near the MSA office, 1.8ft above ground, 16.8ft east of southeast corner of MSA office. 34' north of centerline of road leading to Esso terminal. Stamping 5540C 1979

Auxiliary Benchmarks

5540D 1988
5540E 1988

Additional benchmarks can be found on the Bermuda Biological Station property.

Quality Assessment

Comment

The daily and monthly means do not reveal any obvious reference level shifts.

Year Completeness
Index (%)
Questionable Fluctuations (in day Nos.) and Missing Data (Gaps >6 hours)
1968 95 None
    Gap from 1968/08/15 at 04.00 to 1968/08/24 at 03.00
1969 100 141-143
1970 100 None
1971 100 None
1972 90 117,123,341-342
    Gap from 1972/10/01 at 04.00 to 1972/11/01 at 03.00
    Gap from 1972/12/07 at 04.00 to 1972/12/12 at 03.00
1973 98 None
    Gap from 1973/08/02 at 04.00 to 1973/08/08 at 03.00
    Gap from 1973/08/09 at 20.00 to 1973/08/10 at 17.00
1974 50 120
1975 99 None
    Gap from 1975/05/16 at 19.00 to 1975/05/17 at 12.00
1976 100 59-61,202-203,206-208,234,244
1977 57 21-24,53-61,62-64,91
    Gap from 1977/02/22 at 17.00 to 1977/02/28 at 18.00
    Gap from 1977/05/15 at 17.00 to 1977/05/16 at 11.00
1978 57 None
    Gap from 1978/07/09 at 23.00 to 1978/07/13 at 16.00
    Gap from 1978/11/27 at 19.00 to 1978/11/28 at 03.00
    Gap from 1978/12/23 at 04.00 to 1978/12/23 at 13.00
1979 100 24-31,55-62
1980 100 None
1981 74 None
    Gap from 1981/04/01 at 15.00 to 1981/05/04 at 13.00
    Gap from 1981/07/08 at 04.00 to 1981/09/14 at 01.00
1982 100 232-233
1983 86 None
    Gap from 1983/02/01 at 04.00 to 1983/03/23 at 13.00
1984 92 None
    Gap from 1984/03/01 at 13.00 to 1984/04/01 at 03.00
1985 100 182
1986 100 None
1987 100 None
1988 75 19-24,46-54,76-82,214-215,224-225
(Timing accuracy is questionable throughout the year)
    Gap from 1988/07/01 at 20.00 to 1988/08/01 at 03.00
1989 57 None
    Gap from 1989/04/01 at 04.00 to 1989/05/31 at 12.00
    Gap from 1989/07/01 at 04.00 to 1989/07/10 at 14.00
1991 100 None
1992 100 None
1993 100 None
1994 79 None
    Gap from 1994/03/04 at 08.00 to 1994/03/04 at 15.00
    Gap from 1994/03/11 at 11.00 to 1994/03/12 at 23.00
    Gap from 1994/03/13 at 08.00 to 1994/03/13 at 21.00
    Gap from 1994/03/14 at 14.00 to 1994/03/25 at 15.00
    Gap from 1994/03/25 at 23.00 to 1994/03/27 at 00.00
    Gap from 1994/03/27 at 07.00 to 1994/03/27 at 15.00
    Gap from 1994/03/27 at 23.00 to 1994/03/29 at 21.00
    Gap from 1994/03/30 at 05.00 to 1994/05/01 at 00.00
    Gap from 1994/05/02 at 08.00 to 1994/05/02 at 18.00
    Gap from 1994/05/03 at 02.00 to 1994/05/03 at 21.00
    Gap from 1994/05/05 at 05.00 to 1994/05/07 at 18.00
    Gap from 1994/05/08 at 02.00 to 1994/05/08 at 09.00
    Gap from 1994/05/09 at 04.00 to 1994/05/09 at 18.00
    Gap from 1994/05/10 at 17.00 to 1994/05/11 at 21.00
    Gap from 1994/05/12 at 05.00 to 1994/05/12 at 21.00
    Gap from 1994/05/13 at 05.00 to 1994/05/14 at 15.00
    Gap from 1994/05/14 at 23.00 to 1994/05/15 at 15.00
    Gap from 1994/05/16 at 20.00 to 1994/05/19 at 09.00
    Gap from 1994/05/20 at 08.00 to 1994/05/20 at 15.00
    Gap from 1994/05/21 at 05.00 to 1994/05/21 at 21.00
    Gap from 1994/05/22 at 05.00 to 1994/05/23 at 03.00
    Gap from 1994/05/23 at 11.00 to 1994/05/25 at 00.00
    Gap from 1994/05/25 at 11.00 to 1994/05/29 at 18.00
    Gap from 1994/05/30 at 02.00 to 1994/05/30 at 12.00
1995 100 None