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