QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 04 Apr 2013 Station : Manta-B Latitude: 00 55.9S Country : Ecuador Longitude: 080 43.3W JASL # : 089B Time Meridian: 075W (GMT - 5 hr) GLOSS # : none TOGA #: none NODC #: 50080001 Contributor : Instituto Oceanografico de la Armada Casilla Postal 5940 Telex 3316 INOCAR-ED Guayaquil, Ecuador Originator : same Original Data: analog Instrmnt Type: standard mechanical tide gauge Digitzd Intvl: one hour 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 1990 - 31 Dec 2012 Gaps > 1 mon : 27 Apr 1993 - 23 Jul 1993;28 Feb 1996 - 10 Apr 1996 18 May 1998 - 01 Aug 1998;09 Sep 1998 - 01 Jul 1999 26 Oct 1999 - 07 Dec 1999;01 Jun 2000 - 04 Jul 2000 27 Aug 2000 - 21 Oct 2000;09 Nov 2001 - 01 Jan 2002 06 Jan 2002 - 11 Sep 2002;07 Feb 2008 - 01 Jun 2008 24 Jul 2008 - 11 Sep 2008;01 Apr 2009 - 01 Jul 2009 01 Aug 2009 - 18 Sep 2009;13 Jan 2011 - 08 Apr 2011 22 Feb 2012 - 19 Jun 2012 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1990-2012 Refernce Levl: The data have been linked to tide staff zero by the contributors. However, further analysis of the data has lead to adjustments of the reference level in separate segments. The following adjustments were based upon comparisons with La Libertad, Tumaco, and Buenaventura: For each adjustment, step-like jumps could be identified in the hourly residuals, if the jump did not occur at a data gap. period value added ( (hour)day/month/year ) to original(mm) --------------------------- --------------- (13)23/07/1993-(12)16/06/1995 150 (15)01/06/1996-(16)10/11/1997 200 (00)01/02/1998-(03)18/05/1998 200 (06)01/03/2009-(23)24/03/2010 -500 The above adjustments are uncertain to a few cm. This series is separate from 089A since it appears the reference level has changed. Comment : Timing is poor 1994-1998 with noisy segments that suggest stilling well clogging. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1990 97 1,125-135 (05)335-(15)335 none 1991 100 none none none 1992 96 221-237 (13)032-(22)032 none (05)033-(13)033 (05)061-(16)061 (05)122-(16)122 (19)152-(04)153 1993 72 117-204,247-261, (06)040-(19)040 41-116 335-337 (05)305-(16)305 1994 97 1-2,149-152,187-188, (05)153-(04)154 1,142-149,185-187, 190-193,201-203, (05)305-(12)305 259-274,289-292, 335-336 302-304,356-365 1995 99 342-344 (17)274-(15)275 1-31,47-60,168-365 1996 88 59-101,363-366 (20)190-(17)191 6-18,102-153 (05)306-(16)306 1997 95 152-153,238-251, (05)090-(04)091 1-365 298-302 (07)146-(17)146 (05)274-(04)275 (05)305-(12)305 1998 32 1-5,11-32,74-107, none 5-252 138-213,252-365 1999 35 1-182,185-192,194- none none 195,227-229,246-247, 299-341 2000 65 59-61,82-84,91-94, (10)048-(18)048 none 153-186,222-223,304- (04)049-(12)049 307,309-313,324-329, (05)050-(12)050 347-366 (20)087-(18)088 (18)129-(16)130 (05)150-(13)150 (02)152-(12)152 (05)229-(15)229 (00)230-(14)230 (06)231-(15)231 (07)239-(18)239 (00)240-(14)240 (21)307-(06)308 2001 84 1,47-54,313-365 (16)026-(23)026 none (12)286-(22)286 (17)291-(11)292 (19)292-(03)293 2002 32 1-3,6-254 (20)332-(05)333 335 2003 100 none (05)192-(23)192 124,191,347 (04)256-(12)256 2004 100 none (06)285-(04)286 12-85 2005 100 none (07)198-(06)199 none 2006 95 117-121,151-152, (14)181-(04)182 none 318-331 2007 99 225-229 (18)122-(13)123 none 2008 43 38-153,171-179,186- (21)185-(05)186 none 189,206-255,269-287, 294-296,317-322,333- 334,339-347 2009 61 29-31,44-46,91-182, (15)013-(13)014 60-90,262-274 213-261 (15)057-(13)058 2010 93 83-107 none 108-365 2011 77 13-98 (11)206-(04)207 1-13 2012 60 53-171,192-221 (14)017-(13)018 none