Tofino (Canada) Site History
History Summary
| Station | Tofino |
|---|---|
| Country | Canada |
| GLOSS No | 156 |
| Latitude | 49° 09.0' N |
| Longitude | 125° 55.0' W |
| Time Meridian | 120° W (GMT -8 hr) |
| Contributor | Marine Environmental Data Service,
Dept. of Fisheries and Oceans, S12082-200 Kent St. Ottawa, Ontario, Canada K1A-0E6 |
| Originator | Canadian Hydrographic Service,
Institute of Ocean Sciences, P.O. Box 6000, Sidney, British Columbia, Canada V8L-4B2 |
| Instrument Type | 2 separate float gauges (in separate wells) with bubbler pressure sensor backup
Historical data were from a standard float/well gauge |
| Original Data | Historical data are analogue
Recent data are 1 minute averaged data, downloaded every hour |
| Observational Period | November 1961 - January 2000,
January 2007 - January 2011 |
Tide Gauge Benchmark (TGBM) Description
All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. The controlling benchmark is BM 7, 1971 which is 5.191m above chart datum and 3.096m above geodetic datum.
Quality Assessment
Comment
The data reveal no apparent reference level changes or trends. The hourly residuals show minor fluctuations within the tidal frequency band. It is estimated that the timing is off occasionally by about five to fifteen minutes. Only extreme fluctuations are listed below.
| Year | Completeness
Index (%) |
Questionable Fluctuations (In day Nos.)
and Missing Data (Gaps >6 hours) |
|---|---|---|
| 1965 | 100 | none |
| 1966 | 100 | none |
| 1967 | 100 | none |
| 1968 | 100 | none |
| 1969 | 100 | none |
| 1970 | 100 | none |
| 1971 | 100 | none |
| 1972 | 100 | 136-140 |
| 1973 | 100 | none |
| 1974 | 100 | none |
| 1975 | 100 | none |
| 1976 | 100 | none |
| 1977 | 99 | Gap From 1977/03/30 at 1700 to 1977/04/01 at 0700 |
| 1978 | 75 | Gap From 1978/10/01 at 0800 to 1978/12/31 at 2300 |
| 1979 | 99 | Timing shifted by + 10 hours
Gap From 1979/06/17 at 2300 to 1979/06/21 at 0700 Gap From 1979/07/15 at 2300 to 1979/07/16 at 1400 |
| 1980 | 98 | 353-359 Gap From 1980/07/01 at 2200 to 1980/07/07 at 1700 |
| 1981 | 100 | none |
| 1982 | 100 | none |
| 1983 | 100 | none |
| 1984 | 58 | Gap From 1984/04/11 at 0500 to 1984/09/12 at 1700 |
| 1985 | 100 | none |
| 1986 | 91 | Gap From 1986/06/25 at 1700 to 1986/07/29 at 2000 |
| 1987 | 60 | Gap From 1987/05/01 at 2100 to 1987/09/24 at 1400 |
| 1988 | 74 | Gap From 1988/06/30 at 2200 to 1988/10/04 at 1800 |
| 1989 | 100 | none |
| 1990 | 100 | none |
| 1991 | 99 | Gap From 1991/11/28 at 0300 to 1991/12/01 at 1800 |
| 1992 | 96 | Gap From 1992/01/28 at 2100 to 1992/01/30 at 1700
Gap From 1992/06/07 at 1200 to 1992/06/10 at 0000 Gap From 1992/06/12 at 1800 to 1992/06/24 at 1700 |
| 1993 | 100 | 349 |
| 1994 | 100 | none |
| 1995 | 94 | Timing shifted by + 7 hours
Gap From 1995/07/11 at 0000 to 1995/08/03 at 1000 Gap From 1995/08/16 at 1300 to 1995/08/28 at 1000 |
| 1996 | 100 | none |
| 1997 | 100 | none |
| 1998 | 100 | none |
| 1999 | 100 | none |
| 2007 | 100 | none |
| 2008 | 100 | none |
| 2009 | 100 | none |
| 2010 | 100 | none |
