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