QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 13 Nov 2019 Station : Ponta Delgada Latitude: 37 44.1N Country : Portugal Longitude: 025 40.3W JASL # : 211A Time Meridian: 015W (GMT - 1 hr) GLOSS # : 245 Originator #: 211 NODC #: 73027501 Contributor : Instituto Hidrografico Marinha Rua das Trinas 49-P-1296 Lisboa Codex Lisbon PORTUGAL Originator : In addition to IHM 1999-2015: UH Sea Level Center University of Hawaii at Manoa Honolulu, Hawaii 96822 USA 1996-1998: National Ocean Service (NOS) National Ocean. and Atmos. Administration (NOAA) N/OES22 SSMC4, STATION 7109 1305 East West Highway Silver Spring, MD. 20910 Original Data: analog (OTT); digital (others) Instrmnt Type: 1. 1978-1991: Float and well, A.OTT 2. 1996-6/2007: Aquatrak acoustic gauge (PWL), Next Generation Water Level Measuring System; responsibility resumed by UHSLC in 1999 3. 3/2008- Handar Encoder 436-A, ENC 4. 3/2008- radar (RAD) (Vega Vegapuls 62) 5. 3/2008- pressure transducer (PRS) backup Primary channel used in JASL set: 1978-1991: OTT 1996-3/2008: PWL 3/2008-2018: RAD *short gaps in primary channel filled with other channels as available; see UHSLC for specific dates Digitzd Intvl: Hourly (OTT); 3-min ave. each 6 min (PWL); 2 min (RAD, PRS); 10 min ENC Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot sampling on the hour (OTT); 3-point Hanning filter centered on the hour (others) 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 : 19 May 1978 - 31 Dec 2018 Gaps > 1 mon : 31 Aug 1980 - 13 Jul 1982; 12 Jan - 03 Apr 1984; 25 Apr - 12 Jul 1984; 12 May - 27 Jun 1986; 03 Jul 1987 - 15 Jun 1987;02 Jul 1991 - 01 Jan 1996 12 Jun 2003 - 21 Aug 2003;05 Jun 2007 - 19 Mar 2008 30 Dec 2012 - 25 Mar 2013 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1978-2018 Refernce Levl: The Tide Gauge Zero (TGZ) = Portuguese Hydrographic Institute Chart Datum. TGZ = 3.013m below NP, the tide gauge benchmark, which is a bolt at the root of the pier. TGZ is: 1.000m below adopted mean sea level 3.013m below mark bolt NP of IGP (Por. Geod. Serv.) 10.521m below NP 370 located at main door of S. Jose Church 2.983m below MN A 2.990m below MN B 2.911m below MN C Comment : The daily and monthly means reveal no apparent reference level changes or trends. This site is on Sao Miguel within the Azores. JASL Nov 2019 updated replaces 2016- 10 Feb 2017. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1978 62 none none 199-200 1979 91 52-58,113-117, (18)002-(02)003 40-41,48,192-193, 204-213,228-233, (02)294-(13)294 217-218,221-225,233- 244-247,343-350 (15)353-(01)354 234,247-249,251-252, (12)354-(02)355 260,267-268,275-277, 288-291,296-298,304- 305,309-312,333,337- 339,341-342,350-351, 359-360,363-365 1980 58 2-8,18-22,41-44, none 22-23,45-50,213-216, 52-58,61-67, 223-230,235-243 202-207,244-366 1981 0 none none none 1982 46 1-194,236-238, (10)213-(23)213 201-204,221-222 363-365 1983 96 101-107,264-275 none none 1984 51 12-95,116-195, none 324-325 213-221,266-276, 1985 78 18-26,39-71, none 34,36-37,344-345 106-115,250-260, 324-337,346-355 1986 73 30-44,86-91, none 69-71 106-118,132-179, 193-197,216-224, 317-325 1987 48 24-28,48-51,184-365 none none 1988 54 1-167,331-335 none none 1989 98 28-32,55-59 none none 1990 88 52-56,102-107,113- none none 132,160-165,185-192, 228-231 1991 45 8-18,58-66,183-365 none none 1992 0 1-366 none none 1993 0 1-365 none none 1994 0 1-365 none none 1995 0 1-365 none none 1996 95 103-117,129-131, none none 338-341 1997 98 357-365 none none 1998 98 1-7 (05)300-(19)300 none 1999 100 none (13)320-(04)321 none 2000 99 97-98 none none 2001 93 211-235 none none 2002 97 247-248,331-339 (14)246-(01)247 none 2003 80 152-157,163-233 (14)143-(01)144 none (11)151-(22)151 (11)154-(01)155 (14)159-(01)160 (11)160-(01)161 (08)234-(19)234 2004 100 none (16)286-(11)287 none 2005 97 25-30,181-182,220- (12)167-(08)168 none 224 (20)348-(16)349 (17)355-(13)356 2006 99 22-24,320-321 (08)264-(19)264 none (17)288-(04)289 2007 43 157-365 (17)085-(07)086 none (08)100-(01)101 2008 79 1-79 (03)351-(11)351 none 2009 100 none none none 2010 100 none (13)332-(23)332 none 2011 100 none (00)150-(18)150 none (11)181-(19)181 2012 99 365 none none 2013 77 1-84 (13)174-(00)175 none (23)234-(08)235 2014 94 169-188,361-364 (21)358-(17)359 none (20)359-(09)360 (17)364-(12)365 2015 99 348-350 (00)001-(08)001 none (21)001-(05)002 (22)073-(09)074 (19)238-(09)239 (18)239-(09)240 (16)345-(02)346 (18)351-(09)352 (18)352-(04)353 (21)358-(06)359 2016 100 none (18)003-(04)004 none (20)006-(05)007 (00)023-(08)023 (00)077-(08)077 2017 100 none none none 2018 100 none (12)075-(19)075 none (21)233-(13)234