QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 12 Apr 2019 Station : Nuku Hiva,Marquesas Is. Latitude: 08 55.8S Country : French Polynesia Longitude: 140 04.9W JASL # : 031A Time Meridian: 142.5W (GMT - 9.5) GLOSS # : 142 Originator #: 031 NODC #: 50148001 Contributor : UH Sea Level Center (UHSLC) 1000 Pope Rd. MSB 317 Honolulu, Hawaii 96822 Originator : same Original Data: digital Instrmnt Type: 1. (1982-1983,1986-1997 ) Leupold and Stevens Analog-to-Digital Recorder (ADR); 2. (4/1986-1997) Handar Encoder (ENC) New site established in 2004, roughly 30 feet away from the old site 1. 01/2004-10/2007 pressure transducer (PRS) 2. 01/2004- bubbler (BUB) 3. 10/2007- radar (RAD) (Vega Vegapuls 62) 4. 10/2007-07/2009 2nd pressure transducer (PR2) 5. 07/2009- radar (RA2) Sutron RLR Primary channel used in JASL set (mm/dd/yyyy): 1982-1990: ADR 1991-1997: ENC 2/23/2004-10/7/2007: BUB or PRS BUB: 2/23/2004-4/29/2006;1/2/2007-5/4/2007 PRS: 5/2/2006-12/30/2006;5/6/2007-10/7/2007 RAD: 10/8/2007 - 9/1/2010 RA2: 9/2/2010 - *short gaps in primary channel filled with other channels as available; see UHSLC for specific dates Digitzd Intvl: 15 (ADR); 10 (ENC) minutes; 2 min (RAD, RA2, BUB, PRS, PR2) Present Data : Hourly, daily, and monthly values obtained by: Hourly : (pre-1987) Nine-point triangular filter centered on the hour with respective periods of the 95, 50, and 5% amplitude point of the filter response at 623.6, 177.0, and 103.7 minutes;(1987+) three-point Hanning filter centered on the hour 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 Apr 1982 - 31 Dec 2018 Gaps > 1 mon : 01 Jan 1983 - 11 Feb 1986;03 Nov 1988 - 02 Feb 1989 08 Aug 1994 - 02 Mar 1995;20 Jul 1996 - 04 Mar 1997 01 Jan 1998 - 23 Feb 2004 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1982-2018 Refernce Levl: Heights are referred to the station tide staff zero, which is linked to land-based benchmarks. This reference zero is unique to this station and is not an official datum (chart, national, etc.) and is not relative to local tidal parameters, such as mean lower low water. See the Originators for benchmark descriptions, maps, and the geodetic levelling history. The new station has been tied to the historic tide staff zero and common benchmarks. Comment : The large fluctuations in the hourly residuals on 27-28 Feb 2010 are due to the Chilean tsunami. RAD from 10/2007-8/2010 use with caution due to bias during large wave events. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1982 70 170-179,335-341 none none 1983 0 1-365 none none 1984 0 1-366 none none 1985 0 1-365 none none 1986 89 none none none 1987 100 none none none 1988 84 308-366 none none 1989 84 1-60 none none 1990 100 none none none 1991 100 none none none 1992 99 100-103 none none 1993 99 41-42 none none 1994 60 220-365 none none 1995 83 1-61 none none 1996 55 201-365 none none 1997 83 1-63 none none 1998 0 1-365 none none 1999 0 1-365 none none 2000 0 1-366 none none 2001 0 1-365 none none 2002 0 1-365 none none 2003 0 1-365 none none 2004 84 1-54,72-75,207-208 (23)083-(21)084 none 2005 97 173-174,224-231,315- (17)167-(12)168 none 317,348-349 (05)176-(23)176 (11)180-(01)181 (12)188-(20)188 (10)194-(17)194 (17)196-(12)197 (09)200-(16)200 (13)202-(23)202 (22)264-(09)265 (20)355-(19)356 (16)358-(23)358 2006 99 297-299 (11)023-(04)024 none (16)055-(23)055 (19)082-(04)083 (12)089-(23)089 (15)151-(23)151 (12)160-(19)160 (13)250-(22)250 (13)262-(23)262 (12)264-(23)264 (14)275-(23)275 (14)278-(23)278 (02)289-(09)289 (12)310-(00)311 (17)320-(02)321 (15)326-(02)327 (10)351-(17)351 (14)353-(23)353 2007 97 306-316 (06)027-(00)028 none (23)222-(19)223 (13)244-(20)244 2008 100 none (17)078-(00)079 none (14)250-(07)251 2009 99 201-204 none none 2010 98 122-123,147-150, (08)139-(22)139 78-79,245 182-184 (20)173-(16)174 (20)315-(03)316 (13)332-(00)333 2011 100 none (11)181-(19)181 none (15)239-(02)240 (10)240-(18)240 2012 99 81-83 none none 2013 100 none (00)065-(16)065 none (19)168-(02)169 (13)174-(00)175 (00)235-(08)235 2014 100 none none none 2015 100 none none none 2016 100 none (08)058-(15)058 none (19)158-(03)159 2017 100 none none none 2018 100 none (21)233-(13)234 none