Churchill (Canada) Site History
History Summary
| Station | Churchill |
|---|---|
| Country | Canada |
| WOCE No | 9056 |
| Latitude | 058° 47.0' N |
| Longitude | 094° 12.0' W |
| Time Meridian | 090° W (GMT -6 hr) |
| Contributor | Marine Environmental Data Service,
Dept. of Fisheries and Oceans, S12082-200 Kent St. Ottawa, Ontario, Canada K1A-0E6 |
| Originator | Canadian Hydrographic Service,
876 Lakeshore Road, Burlington, Ontario, Canada L7R-4A6 |
| Instrument Type | Stilling well system with 2 separate float and pulley gauges (float and counterweight with encoder) with pressure backup. |
| Original Data | Digital (earlier data were analogue). Sampling at 3 minute intervals. |
| Observational Period | 01 November 1961 at 0600 -
01 January 2011 at 0500 |
Reference Levels
All heights have been referred to the station datum which is linked to fixed benchmarks.
Quality Assessment
Comment
The hourly residuals show significant fluctuations within the tidal frequency band. It is not clear whether this is due to the inability of the tidal analysis to resolve the complex nature of the tides or errors in the timing of the instrument. Only extreme fluctuations are listed below.
| Year | Completeness
Index (%) |
Questionable Fluctuations (In day Nos)
and Missing Data (Gaps >6 hours up to 2002, all gaps reported after) |
|---|---|---|
| 1961 | 96 | Gap From 1961/11/09 at 0600 to 1961/11/10 at 0500
Gap From 1961/11/17 at 0600 to 1961/12/02 at 0500 |
| 1962 | 94 | 204-207,259-260,314
Gap From 1962/09/17 at 0600 to 1962/09/21 at 0500 Gap From 1962/12/06 at 0600 to 1962/12/24 at 0500 |
| 1963 | 97 | 153-154,275
Gap From 1963/02/01 at 0600 to 1963/02/11 at 0500 Missing data-1963/12/02 at 0600 to 1963/01/03 at 0500 |
| 1964 | 100 | 001-004,246,320-343 |
| 1965 | 100 | 168,283-294,301-321,364 |
| 1966 | 93 | 032-039,231-234,327-335,345-365
Gap From 1966/01/05 at 0600 to 1966/02/01 at 0500 |
| 1967 | 84 | 001-008,029-034,082,091,136-153,161-251,254-273,294-308,318-335
Gap From 1967/04/01 at 0600 to 1967/05/01 at 0500 Gap From 1967/12/01 at 0600 to 1967/12/02 at 0500 Missing data-1967/12/02 at 0600 to 1967/12/31 at 2300 |
| 1968 | 99.9 | 190-196,306,337-338
Missing data-1968/01/01 at 0000 to 1968/01/01 at 0500 |
| 1969 | 100 | 212-220 |
| 1970 | 100 | 182 |
| 1971 | 100 | None |
| 1972 | 100 | 104-122,164 |
| 1973 | 100 | 326-336 |
| 1974 | 75 | Missing data-1974/10/01 at 0600 to 1974/12/31 at 2300 |
| 1975 | 98 | 113-122,196-199
Missing data-1975/01/01 at 0000 to 1975/01/01 at 0500 Gap From 1975/03/26 at 2000 to 1975/04/01 at 1700 Gap From 1975/05/12 at 0100 to 1975/05/12 at 0800 Gap From 1975/11/30 at 1600 to 1975/12/01 at 0500 |
| 1976 | 99.4 | Gap From 1976/08/26 at 1600 to 1976/08/26 at 2300
Gap From 1976/08/27 at 0400 to 1976/08/27 at 1100 Gap From 1976/08/28 at 0600 to 1976/08/28 at 1200 Gap From 1976/09/06 at 0100 to 1976/09/06 at 0900 Gap From 1976/09/07 at 0200 to 1976/09/07 at 0900 Gap From 1976/09/12 at 1800 to 1976/09/13 at 0100 Gap From 1976/09/28 at 0600 to 1976/09/28 at 1200 Gap From 1976/09/29 at 0700 to 1976/09/29 at 1300 |
| 1977 | 99.7 | Timing shifted by +1 hour
Gap From 1977/07/02 at 1400 to 1977/07/03 at 1400 |
| 1978 | 99 | Missing data-1978/01/01 at 0000 to 1978/01/01 at 0500
Gap From 1978/01/12 at 1300 to 1978/01/16 at 2100 |
| 1979 | 65 | Gap From 1979/01/30 at 0500 to 1979/01/31 at 1800
Gap From 1979/02/01 at 0600 to 1979/02/05 at 1500 Gap From 1979/02/13 at 0700 to 1979/03/09 at 0500 Gap From 1979/03/20 at 1100 to 1979/05/01 at 0500 Gap From 1979/05/03 at 0200 to 1979/05/04 at 1700 Gap From 1979/05/13 at 1400 to 1979/05/15 at 1300 Gap From 1979/07/12 at 0300 to 1979/07/16 at 2300 Gap From 1979/08/07 at 1300 to 1979/09/03 at 0900 Gap From 1979/09/06 at 1300 to 1979/09/07 at 1700 Gap From 1979/09/08 at 0300 to 1979/09/15 at 1600 Gap From 1979/09/24 at 1200 to 1979/09/28 at 2100 Gap From 1979/10/06 at 0200 to 1979/10/20 at 0500 |
| 1980 | 88 | Gap From 1980/02/01 at 0600 to 1980/02/04 at 1700
Gap From 1980/02/20 at 1800 to 1980/02/25 at 1700 Gap From 1980/03/23 at 0600 to 1980/03/23 at 1700 Gap From 1980/04/14 at 1000 to 1980/04/17 at 2200 Gap From 1980/06/01 at 0600 to 1980/06/07 at 1700 Gap From 1980/06/27 at 1900 to 1980/07/03 at 1700 Gap From 1980/08/13 at 0600 to 1980/08/18 at 1600 Gap From 1980/08/31 at 1400 to 1980/09/14 at 1600 Gap From 1980/11/04 at 0900 to 1980/11/04 at 1700 |
| 1981 | 98 | 274-277
Gap From 1981/10/09 at 0600 to 1981/10/18 at 0500 |
| 1982 | 51 | 066-069,071-073,074-078,083-097,111-121,170-171
Gap From 1982/02/14 at 2100 to 1982/03/07 at 1700 Gap From 1982/03/10 at 0400 to 1982/03/12 at 0500 Gap From 1982/03/14 at 0600 to 1982/03/15 at 0500 Gap From 1982/03/29 at 0600 to 1982/04/01 at 0500 Gap From 1982/05/01 at 0600 to 1982/06/08 at 0700 Gap From 1982/09/07 at 2200 to 1982/09/08 at 0500 Missing data-1982/09/08 at 0600 to 1982/12/31 at 2300 |
| 1983 | 78 | Missing data-1983/01/01 at 0000 to 1983/01/01 at 0500
Gap From 1983/01/02 at 0600 to 1983/01/04 at 1600 Gap From 1983/01/14 at 0600 to 1983/01/25 at 0600 Gap From 1983/02/01 at 0600 to 1983/02/02 at 0500 Gap From 1983/02/27 at 0600 to 1983/03/03 at 0500 Gap From 1983/03/15 at 0600 to 1983/03/18 at 0900 Gap From 1983/03/22 at 0600 to 1983/03/23 at 0500 Gap From 1983/07/01 at 0600 to 1983/08/05 at 1700 Gap From 1983/08/08 at 1500 to 1983/08/18 at 0500 Gap From 1983/09/09 at 0600 to 1983/09/16 at 0500 Gap From 1983/12/05 at 0000 to 1983/12/05 at 2200 Gap From 1983/12/18 at 0600 to 1983/12/24 at 0500 |
| 1984 | 31 | Missing data-1984/01/01 at 0600 to 1984/02/01 at 0500
Gap From 1984/02/02 at 0800 to 1984/02/02 at 1700 Gap From 1984/02/17 at 0600 to 1984/08/15 at 1500 Gap From 1984/08/30 at 2100 to 1984/09/07 at 1800 Gap From 1984/10/14 at 0600 to 1984/11/05 at 0500 Gap From 1984/11/15 at 2300 to 1984/12/27 at 2200 |
| 1985 | 70 | 151-161,181-185,267-269
Gap From 1985/01/10 at 2300 to 1985/01/17 at 2200 Gap From 1985/02/11 at 1600 to 1985/02/14 at 2100 Gap From 1985/02/21 at 2300 to 1985/03/01 at 0500 Gap From 1985/04/30 at 2100 to 1985/05/01 at 2100 Gap From 1985/05/02 at 0600 to 1985/05/31 at 2100 Gap From 1985/07/05 at 0600 to 1985/08/01 at 0500 Gap From 1985/08/31 at 2200 to 1985/09/12 at 2000 Gap From 1985/09/30 at 2100 to 1985/10/01 at 0500 Gap From 1985/10/10 at 2200 to 1985/10/25 at 0100 Gap From 1985/11/18 at 1900 to 1985/11/19 at 2300 |
| 1986 | 75 | Gap From 1986/02/14 at 1800 to 1986/02/20 at 2200
Gap From 1986/03/12 at 0400 to 1986/03/13 at 2200 Gap From 1986/04/11 at 0300 to 1986/04/17 at 2100 Gap From 1986/05/15 at 2200 to 1986/05/29 at 2100 Gap From 1986/07/20 at 0600 to 1986/09/11 at 1000 Gap From 1986/09/16 at 0400 to 1986/09/22 at 0900 Gap From 1986/09/29 at 2000 to 1986/09/30 at 1700 Gap From 1986/10/21 at 1500 to 1986/10/22 at 1500 Gap From 1986/12/30 at 0600 to 1987/01/01 at 0500 |
| 1987 | 98 | Timing error throughout the year
Missing data-1987/01/01 at 0600 to 1987/01/02 at 0500 Gap From 1987/03/25 at 1400 to 1987/03/31 at 1300 Gap From 1987/07/28 at 1400 to 1987/07/30 at 0500 Missing data-1987/12/31 at 1400 to 1987/12/31 at 2300 |
| 1988 | 81 | 238-240
Missing data-1988/01/01 at 0000 to 1988/01/01 at 0500 Gap From 1988/02/25 at 2200 to 1988/02/29 at 2100 Gap From 1988/08/11 at 2200 to 1988/08/18 at 2000 Gap From 1988/08/23 at 0400 to 1988/08/25 at 2100 Gap From 1988/08/27 at 0700 to 1988/09/01 at 2000 Gap From 1988/09/05 at 0900 to 1988/09/07 at 1800 Gap From 1988/09/09 at 1400 to 1988/09/22 at 1100 Gap From 1988/09/24 at 1700 to 1988/10/07 at 1200 Gap From 1988/11/17 at 2200 to 1988/11/24 at 2100 Gap From 1988/12/01 at 2200 to 1988/12/15 at 2100 |
| 1989 | 68 | 100-105
Gap From 1989/01/02 at 2300 to 1989/03/16 at 2200 Gap From 1989/06/20 at 1300 to 1989/06/22 at 2000 Gap From 1989/06/29 at 0100 to 1989/06/29 at 2000 Gap From 1989/06/30 at 0900 to 1989/07/17 at 1100 Gap From 1989/11/01 at 2200 to 1989/11/23 at 2100 |
| 1990 | 88 | Gap From 1990/02/08 at 2100 to 1990/03/07 at 2200
Gap From 1990/04/26 at 2200 to 1990/05/02 at 2000 Gap From 1990/09/30 at 2100 to 1990/10/03 at 1900 Gap From 1990/12/18 at 1700 to 1991/01/01 at 0500 |
| 1991 | 95 | 091-092,183-191
Missing data-1991/01/01 at 0600 to 1991/02/01 at 0500 Gap From 1991/06/06 at 1600 to 1991/07/02 at 1400 |
| 1992 | 100 | 248-249 |
| 1993 | 100 | 176-179 |
| 1994 | 99 | Gap From 1994/08/15 at 1900 to 1994/08/16 at 0900
Gap From 1994/08/16 at 1100 to 1994/08/19 at 1300 |
| 1995 | 100 | None |
| 1996 | 100 | None |
| 1997 | 100 | None |
| 1998 | 99 | 001-018,026-032,040-047,089-090,116-119 |
| 1999 | 99 | 074-077,127-129
Gap From 1999/04/01 at 0300 to 1999/04/01 at 1200 |
| 2000 | 99 | 016-019,021-022,219-223,246-251,319-323,331-335,347-352,361-365
Gap From 2000/10/11 at 1100 to 2000/10/12 at 0400 |
| 2001 | 99 | 007-014,034-048,063-078,082-085,135-142,145-150,245-259,265-269,299-302,336-339 |
| 2002 | 97 | 126-133
Gap From 2002/05/14 at 1300 to 2002/05/21 at 0500 Gap From 2002/06/21 at 1500 to 2002/06/23 at 1800 Gap From 2002/10/01 at 0700 to 2002/10/02 at 0500 |
| 2003 | 100 | None |
| 2004 | 100 | None |
| 2005 | 100 | None |
| 2006 | 99 | Gap From 2006/09/14 at 2100 to 2006/09/15 at 0000
Gap at 2006/09/28 1200 |
| 2007 | 100 | None |
| 2008 | 99 | Gap at 2008/06/25 1200 |
| 2009 | 99 | Gap From 2009/11/02 at 2200 to 2009/11/03 at 0500 |
| 2010 | 99 | Gap From 2010/01/06 2000 to 2010/01/07 1600
Gap at 2010/03/08 1900 |
