Christmas-B (Line Island, Kiribati) Site History
Site
| Station | Christmas-B |
|---|---|
| Country | Republic of Kiribati |
| Latitude | 01° 58.9' N |
| Longitude | 157° 28.3' W |
| GLOSS No | 146 |
| Time Reference | GMT (hours 00-23) |
| Contributor | UH Sea Level Center |
| Instrument Type | 1. (1974-present) Leupold and Stevens Analog-to-Digital Recorder (ADR) 2. (11/1982-present) Handar Encoder (ENC) |
| Primary Gauge | ADR:1974-90 ENC: 1991- |
| Site of Gauge | The gauge is situated at the end of the wharf nearest to the small boat jetties. |
| Observational periods | 1974 - present |
Reference Level
All heights have been referred to the station tide staff zero which is linked to fixed bench marks.
Benchmarks
| Benchmark | Description |
|---|---|
| UH-1 | 1.25 inch SS disk with 'UH 1 1979' scribed into the concrete base of tide house support,in the SW corner, 1ft from edge (established 10 Oct 1979). |
| USGS 8 | The brass disk stamped 'Benchmark-USGS NO 8', in the SE corner of the mechanical shop is set in cement foundation 100 yd west of tide house (est. 1959). |
| USGS 17 | The brass disk stamped 'Benchmark-USGS NO 17' is located at entrance of the public works carpenter shop office (established 1959). |
| UH-XD | 1 inch square SS pin set in green epoxy, incised 'XD 90' is located at boat shed, on the right hand side of the door (established 30 Oct 1990). |
| UH-XB | 1 inch square SS pin set in green epoxy, incised 'XB 90', is located at Public Works workshop, in the southern corner, on the right hand side of the entry, 2ft from the edge of the building (established 30 Oct 1990). |
Quality Assessment by the UH Sea Level Centre
Comment
The daily and monthly means reveal no apparent changes in the reference level and agree with Kanton. This series is distinguished from Christmas-A because the data are not linked to a common datum.
| Year | CI(%) | Missing Data | Replaced Gaps or Bad Data | Questionable Fluctuations |
|---|---|---|---|---|
| 1974 | 90 | 364-365 | (01)041-(15)041 (11)093-(01)094 (09)213-(08)214 (17)216-(04)217 (15)335-(00)336 | 117,233,263-264,282,307,316 |
| 1975 | 98 | 1,117-122 | (15)028-(02)029 | 39-46,56-59,69-74,84-90 |
| 1976 | 84 | 72-128 | none | none |
| 1977 | 100 | none | none | 124-138,150-152 |
| 1978 | 74 | 80-135,267-269,278-282,292-296,299-319,322-323,328-330 | none | 321 |
| 1979 | 74 | 11-13,131-136,189-192,202-283 | none | 102-104 |
| 1980 | 98 | 64-65,113-116,156-158 | none | 73-79,82,84,94,103-110 |
| 1981 | 90 | 237-264 | none | none |
| 1982 | 96 | 294-308 | none | none |
| 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 | 98 | 322-329 | none | none |
| 1992 | 99 | 155-157 | none | none |
| 1993 | 100 | none | none | none |
| 1994 | 100 | none | none | none |
| 1995 | 100 | none | none | none |
| 1996 | 66 | 34-160 | none | none |
| 1997 | 100 | none | none | none |
| 1998 | 100 | none | none | none |
