QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Port Louis-A Latitude: 20 09.2S Country : Mauritius Longitude: 057 29.4E JASL # : 103A Time Meridian: 060E (GMT + 4 hr) GLOSS # : 018 TOGA #: I057 NODC #: 32050701 Contributor : Institute of Oceanographic Sciences (IOS) Bidston Observatory, Birkenhead Merseyside L43 7RA and Scripps Institute of Oceanography University of California at San Diego La Jolla, California 92038 Originator : same Original Data: analog Instrmnt Type: Munroe, float and stilling well Digitzd Intvl: one hour spot reading Present Data : Hourly, daily, and monthly values obtained by: Hourly : The original digitizing interval was hourly 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 : 01 Jan 1942 - 31 Dec 1947 Gaps > 1 mon : 18 Dec 1943 - 19 Jan 1944;01 Apr 1945- 05 Jun 1945 12 Nov 1945 - 31 Dec 1945 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : No Operational : No Sat. Trans. : No Distribution : 1942-1947 Refernce Levl: The sea level heights are referred to the zero point assigned to the tide gauge. Comment : The daily or monthly means do not reveal any obvious reference level changes or trends. Data for 1942-1947 were received from two originators. The difference in daily values between the series was steady with a mean value of 3040 mm. Thus 3040 mm was added to each value of the Bidston data and then the data sets were merged. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1942 95 1,14-16,109-113, none 120-121,145-146 122-127,146-153 1943 96 352-365 none 154-156 1944 87 1-19,338-365 (13)075-(08)076 23-30,36-40,95-98, (07)188-(19)188 191,272-278,301,314- 316,321-322,327-338 1945 62 14-24,32-38, (08)190-(14)190 68-72,264 48-50,90-156, 166-167,172-174, 304-307,316-365 1946 100 none (15)083-(21)083 98-100,105-106 (19)348-(08)349 1947 100 none (09)057-(16)057 39-42,45,96-99,365 (09)058-(17)058 (09)132-(19)132 (11)243-(19)243