QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Guadalupe Latitude: 28 53.0N Country : Mexico Longitude: 118 18.0W JASL # : 036A Time Meridian: 120W (GMT - 8 hr) GLOSS # : 160 TOGA #: P071 NODC #: 72118801 Contributor : Centro de Investigacion Cientifica y de Educacion Superior de Ensenada (CICESE) Av. Espinoza No. 843 APDO. Postal 2732 Ensenada, Baja California, Mexico Originator : same Original Data: analog (SA), digital (ADR) Instrmnt Type: 1. Standard analog (SA) float gauge (1977-1982), 2. Fischer and Porter Analog-to-Digital Recorder (ADR) model 35C Digitzd Intvl: hourly (SA), 30 minutes (ADR) Present Data : Hourly, daily, and monthly values obtained by: Hourly : Running mean A2,A2,A3 (Godin,1972) 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 : 23 Jul 1977 - 31 Dec 1985 Gaps > 1 mon : 09 Aug 1981 - 25 Sep 1981;01 Feb 1982 - 07 Mar 1982 15 Feb 1983 - 28 Apr 1983;28 Jul 1983 - 25 Sep 1983 11 Oct 1983 - 16 Feb 1984;15 Jul 1984 - 09 Oct 1984 07 Nov 1984 - 27 May 1985;09 Aug 1985 - 25 Sep 1985 28 Oct 1985 - 08 Dec 1985 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : No Sat. Trans. : No Distribution : 1977-1985 Refernce Levl: The sea level heights are referred to the tide staff zero which is linked to fixed bench marks. Comment : The daily and monthly values do not reveal any obvious reference level shifts or trends and agree reasonably well with the nearest station, Cedros Island, Baja California. The data quality decreases after 1980. The station has not been in operation since Jan 1986. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1977 44 none (18)301-(03)302 224-230,251-252,257, 267-272,297-301,316- 317,324-332,340-343 1978 97 89-97,245-249 (05)230-(14)230 82-85,110-115,138- (13)354-(02)355 143,170,231-232,275- 277,287,301-308,313- 318,350-352,319-365 1979 99 69-72 (19)001-(02)002 14-21,67-68,72-75, (06)022-(02)023 96-107,112-119,208, (06)035-(14)035 235,338-339,350-352, (19)035-(03)036 362-364 1980 100 none (22)128-(15)129 136,357 1981 86 124-126,140-142, (08)025-(18)025 76-84,89-99,129, 147-148,221-268 (07)028-(19)028 133-134,195-201,217- (08)069-(19)069 220,277-279,281-291, (21)073-(06)074 326-333,341-348 (09)076-(21)076 (21)093-(07)094 (08)128-(19)128 (08)136-(07)137 (08)138-(07)139 (22)177-(07)178 (23)189-(06)190 (00)277-(08)277 (22)279-(07)280 (07)331-(19)331 (23)342-(06)343 (19)348-(02)349 (08)363-(19)363 1982 86 32-66,119-121, (21)143-(10)144 169-171,199-201, (20)166-(05)167 261-271 (00)216-(08)216 (06)224-(19)224 (00)249-(19)249 (15)279-(07)280 (19)282-(06)283 (23)299-(07)300 (23)338-(07)339 (21)347-(07)348 1983 40 46-118,209-268, (00)013-(07)013 9,129-137,202-208 284-365 (21)128-(08)129 (18)159-(01)160 1984 46 1-48,61-62, (00)058-(10)058 61,108,133-141, 66-69,81-82, (07)094-(18)094 162-171,306-310 98-101,197-283, (15)096-(02)097 312-366 (00)102-(11)102 (06)105-(00)106 (07)107-(19)107 1985 35 1-147,197-199, none 182-186,200,291-293, 221-268,301-343 360-361