QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Manus Latitude: 02 00.8S Country : Papua New Guinea Longitude: 147 16.3E JASL # : 065A Time Meridian: 150E (GMT + 10 hr) GLOSS # : none TOGA #: P021 NODC #: 30142701 Contributor : The National Tidal Facility Flinders University of South Australia GPO Box 2100 Adelaide, 5001, South Australia AUSTRALIA Originator : CSIRO Division of Oceanography GPO Box 1538 Hobart, Tasmania 7001 Original Data: digital Instrmnt Type: Leupold Stevens analog-to-digital recorder Digitzd Intvl: 15 minutes Present Data : Hourly, daily, and monthly values obtained by: Hourly : simple Gaussian filter Daily : 119-point convolution filter (Bloomfield, 1976) centered on noon applied to the hourly data with respective periods of the 95, 50, and 5% amplitude points at 124.0, 60.2, and 40.2 hours Monthly: Simple average of all daily values; calculated if 7 or fewer days are missing Span of data : 04 Sep 1984 - 31 Dec 1994 Gaps > 1 mon : 25 Feb 1987 - 01 May 1987;14 May 1987 - 14 Jun 1989 02 Aug 1992 - 08 Sep 1992;22 Sep 1993 - 09 Feb 1994 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1984-1994 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed bench marks Comment : The daily and monthly means and differences with Kavieng, Lae, and Madang reveal suspiciously low mean values during 1993. No clear level shift could be identified. The matter is under investigation. The gauge is located within the barrier reef, subject to seiche activity. SPECIAL NOTE FROM THE DATA CONTRIBUTORS: Supply of sea level data subject to the following conditions: i) When any data supplied by the National Tidal Facility is used in any publication or report, the origin of such data shall be acknowledged in that publication or report in the following approved form:-- "Tidal {predictions) for {port} {are} supplied {constants} {station} {is} {material} {...} by the National Tidal Facility, The Flinders University of South Australia, Copyright reserved." ii) All material is supplied in good faith and is believed to be correct. It is supplied on the condition that no warranty is given in relation thereto, that no responsibility or liability for errors or omissions is, or will be, accepted and that the recipient will hold the Flinders Univer- sity of South Australia and the National Tidal Facility free from all such responsibility or liability and from all loss or damage incurred as a consequence of any error or omission. iii) The acceptance of material and computations from the National Tidal Facility of the Flinders University of South Australia will be deemed to include acceptance of the conditions of supply. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1984 33 none none none 1985 98 121-124,252-254, none none 284-288 1986 100 none none none 1987 15 29-43,56-121, none none 134-365 1988 0 1-366 none none 1989 55 1-165 none none 1990 99 105-109,303-304 none none 1991 98 207-211,231-236 none none 1992 90 184-185,215-252 none none 1993 76 265-365 none none 1994 88 1-40,267-272 none 186-202