Ketchikan (Alaska) Site History
History Summary
| Station | Ketchikan, Alaska |
|---|---|
| Country | U.S.A. |
| Latitude | 055° 20.0' N |
| Longitude | 131° 37.5' W |
| WOCE No | 9046 |
| Time Meridian | 135W (GMT -9 hr) |
| Time Reference | GMT (0-23) |
| Contributor | National Ocean Service (NOS) National Ocean. and Atmos. Administration (NOAA) N/OES22 SSMCA, STATION 7109 1305 East West Highway Silver Spring, MD. 20910-3233 |
| Originator | Same |
| Instrument Type | Float/well system 1949 - 1992 Aquatrak acoustic gauge, NOAA Next Generation Water Level Measuring System (NGWLMS) 1993 - 2000 |
| Observational Period | 01 January 1949 - 2000 |
Reference Level
All heights have been referred to the station tide staff zero which is linked to fixed bench marks. When standard mechanical or ADR instrument was the primary gauge, leveling calibration factors were applied monthly based on tide staff comparisons.
Tide Gauge Benchmark (TGBM) Description
Unavailable at present.
Quality Assessment
Comments
There is no evidence of any obvious reference level shifts.
Most questionable fluctuations are related to timing problems with the gauge, only extreme fluctuations are noted below.
1963 - 1964 No data available
1991 - 1994 Timing shifted by + 9 hours
The data for 1991-2000 were supplied with heights relative to MLLW. Consequently 1894mm was added to refer the data to tide gauge zero.
The data for 1998-2000 were supplied in non-GMT format and had to be shifted into GMT.
| Year | CI (%) | Missing Data | Replaced Gaps or Bad Data | Questionable Fluctuations |
|---|---|---|---|---|
| 1949 | 99 | 1 | None | None |
| 1950 | 100 | None | None | 157,198,242-242,284 |
| 1951 | 100 | None | None | 114 |
| 1952 | 100 | None | None | 217-218 |
| 1953 | 100 | None | None | None |
| 1954 | 100 | None | None | None |
| 1955 | 100 | None | None | None |
| 1956 | 100 | None | None | 45-47,85-86,303 |
| 1957 | 100 | None | None | 324 |
| 1958 | 100 | None | None | 76 |
| 1959 | 100 | None | None | None |
| 1960 | 97 | 260-270 | None | 116,187-188,220-260,338 |
| 1961 | 100 | None | None | 147-151,271 |
| 1962 | 100 | None | None | 62-63,313-317,329 |
| 1965 | 99 | 1 | None | None |
| 1966 | 100 | None | None | 111-114,120-122,125-126,149-153,155-158,174-175 |
| 1967 | 100 | None | None | 2,233,249 |
| 1968 | 62 | 90-123,152-260 | None | 1-2,29-30,64-65,332-339,363-366 |
| 1969 | 96 | 38-48,345-351 | None | 14-15 |
| 1970 | 100 | None | None | 292-294 |
| 1971 | 100 | None | None | None |
| 1972 | 92 | 336-366 | None | 123-124,152-169,280-281,298,311-315 |
| 1973 | 80 | 1-3,17-60,183-197,245-255,326-330 | (10)011-(18)011,(11)012-(19)012,(11)013-(20)013,(12)014-(21)014,(03)015-(10)015,(13)015-(22)015,(04)016-(12)016,(05)017-(12)017,(21)238-(07)239 | 60-62,85,126-127,312,313 |
| 1974 | 100 | None | None | 37,64-69,199-200,234-236 |
| 1975 | 100 | None | 246 | 28,42-45,55,85,120,145,208-209,250,347-357 |
| 1976 | 92 | 1-13,159-161,164-168,258-264,357-362 | None | 195 |
| 1977 | 92 | 212-239,283-284,286-289 | None | None |
| 1978 | 98 | 288-297 | (07)132-(14)132 | 25-26,308-320 |
| 1979 | 83 | 3-15,24-25,29-31,219-264,336-337 | None | 120-121 |
| 1980 | 95 | 176-194 | None | 290-291,362-363 |
| 1981 | 100 | None | None | None |
| 1982 | 95 | 185-200 | 244 | 163-164 |
| 1983 | 100 | None | None | None |
| 1984 | 100 | None | None | None |
| 1985 | 100 | None | None | None |
| 1986 | 100 | None | None | None |
| 1987 | 100 | None | None | None |
| 1988 | 100 | None | None | None |
| 1989 | 100 | None | None | None |
| 1990 | 100 | None | None | None |
| 1991 | 100 | None | None | None |
| 1992 | 100 | None | None | None |
| 1993 | 100 | None | None | None |
| 1994 | 100 | None | None | None |
| 1995 | 100 | None | None | None |
| 1996 | 100 | None | None | None |
| 1997 | 100 | None | None | None |
| 1998 | 100 | None | None | 1-30,320-328,334-365 |
| 1999 | 100 | None | None | 1-20,27-36,40-41,45-46,88-90,172-175,179-182,234,242-250,313-321,324-328,337-348,353 |
| 2000 | 100 | None | None | 1-39,44-58,100-113,235,239-249,259-271,312-320,329-366 |
