Funafuti (Tuvalu) Site History

History Summary

Station Funafuti
Country Tuvalu
Latitude 08° 31.5'S
Longitude 179° 11.7' E
GLOSS No 121
Time Reference GMT (hours 00-23)
Contributor UH Sea Level Center
Gaps in 1993-1996 data filled by:
The National Tidal Facility (NTF)
Flinders University of South Australia
GPO Box 2100, Adelaide, 5001,
South Australia.
Note: The NTF gauge is about 1.5 miles from UH gauge at 08° 30.14' S and 179° 11.70' E
Instrument Type 1. (October 1977 - August 1986) Fischer and Porter Analog-to-Digital Recorder (ADR)
2. (August 1986-present) Leupold and Stevens Analog-to-Digital Recorder (ADR);
3. (August 1986-present) Handar Encoder (ENC) (Primary gauge: ADR:1974-90, ENC 1991-)
4. NTF: Aquatrak acoustic gauge (SEAFRAME) (primary 4/January/1995 onward)
Site of Gauge  
Observational periods 1977 - 2001

Reference Level

All heights have been referred to the station tide staff zero which is linked to fixed benchmarks.

Quality Assessment by the UH Sea Level Centre

Comments

The daily and monthly means reveal no apparent changes in the reference level and agree with Honiara and Penrhyn.

Timing accuracy prior to 1984 is no better than plus or minus 8 minutes.

Gaps filled with NTF data noted with '*' if gap length >6 hr. Many shorter gaps filled with NTF data are documented and available from the UHSLC.

Year CI(%) Missing Data Replaced Gaps or Bad Data Questionable Fluctuations
1978 97 162-164,213-216,220-222 (09)217-(22)217 (03)218-(23)218 95-99,115,145-146,201-204,228-233,246-247,252-263,299-308
1979 76 39-55,69-71,88-103,191-226,236-239,272-276, 287-290,343-345 none 111-116,233-234,250,305-308
1980 86 63-80,82-87,135-136,222-223,246-247,345-366 none 238-243,268-270,282-283
1981 83 1-42,93-95, 115-123,149-153,224-227 none 167,177-178,183-184,210-212,343-347
1982 99 275-276,296-297 none 141-146,256-260,318
1983 93 12-17,77-86,125-127,232-237 none 160-164,190
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 *(00)182-(23)186 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 none
1999 100 none none 339-347,354-356
2000 100 none none 218-223
2001 100 none none none