QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 18 Jan 2017 Station : Keelung Latitude: 25 09.3N Country : Republic of China Longitude: 121 45.1E JASL # : 341A Time Meridian: 120E (GMT + 8 hr) GLOSS # : none Originator #: 1516 NODC #: 12125101 Contributor : Marine Meteorology Center Central Weather Bureau 64 Kung Yuan, Taipei, Taiwan REPUBLIC OF CHINA 10039 Originator : same Original Data: analog (Fuji); digital (Sutron) Instrmnt Type: Fuji float/well (1980-6/1991); Sutron RTU 9000 Aquatrak acoustic well (7/1991-) Digitzd Intvl: hourly (Fuji); 6-minute (Sutron) Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot 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 1980 - 31 Dec 2016 Gaps > 1 mon : 08 Apr 1998 - 23 Oct 1998;04 Jan 1999 - 02 Jun 1999 31 Dec 2000 - 13 Sep 2003;31 Jan 2005 - 30 Apr 2005 19 May 2005 - 30 Jun 2005 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1980-2016 Refernce Levl: The instrument reference level (RL) of each tide station is calibrated to a tide gauge benchmark beside the station. The elevation at a tide gauge benchmark is based on the first order leveling network of the Ministry of Interior leveling survey, on which the mean sea level of Keelung (KP) is treated as the zero datum level for Taiwan area. Therefore the tide records of each station should be interpreted as the height above the mean level of Keelung. After 2007, the tide records of Keelung are interpreted as the height above the mean sea level of Keelung. For Keelung, the tide benchmark above reference level is 265.1 cm. The tide benchmark above KP is 173.1 cm. Historic data 01 Jan 1980 to 18 Nov 2007 were adjusted to the KP by adding -92 cm. Comment : Minor timing drifts are suspected in the hourly data. The site was moved to 25 09.4N, 121 44.7E in June 1991. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1980 100 none none none 1981 100 none none 286-290 1982 100 none none none 1983 100 none (06)028-(03)029 none 1984 100 none none none 1985 100 none none none 1986 100 none none none 1987 100 none none 211 1988 100 none none none 1989 100 none none none 1990 100 none none 231-232 1991 100 none none none 1992 96 135-148 none none 1993 96 46-47,196-198, (23)016-(15)017 none 342-224 1994 96 187-200 none none 1995 87 277-281,287-288,291- (08)251-(15)251 none 316,333-336,344-357 1996 88 181-197,220-222,236- (21)286-(15)287 none 252,308-312,350-355 1997 96 61-64,122-135 (01)353-(00)354 none 1998 46 98-296 (14)025-(21)025 none (00)301-(07)301 1999 55 4-153,227-243 none none 2000 94 251-270,272-274,366 (16)243-(15)244 none 2001 0 1-365 none none 2002 0 1-365 none none 2003 30 1-256 none none 2004 95 22-24,250-258,292- (16)284-(23)284 none 302 (16)285-(23)285 2005 61 31-120,123-125,137- (05)136-(14)136 none 181,212-220,283-284 (01)137-(08)137 (12)270-(03)271 2006 100 none none none 2007 93 298-312,317-323,333- (07)358-(02)359 none 338 2008 96 107-108,193-195, (17)065-(08)066 none 345-358 (08)085-(23)085 (03)125-(23)125 (23)140-(07)141 (09)141-(01)142 (04)144-(11)144 (10)159-(02)160 (09)207-(01)208 (15)211-(00)212 (12)216-(23)216 (13)219-(23)219 (16)228-(13)229 (00)359-(07)359 2009 96 95-97,231-239,310- (09)005-(01)006 none 312,354-357,365 (09)007-(02)008 (12)227-(09)228 (14)229-(11)230 (15)230-(23)230 (10)259-(17)259 (09)260-(22)260 (09)261-(23)261 (13)275-(03)276 (17)287-(02)288 (13)302-(08)303 (16)307-(23)307 (09)312-(06)313 (11)314-(07)315 (06)340-(23)340 (10)358-(06)359 2010 96 147-151,193-195, (17)009-(03)010 none 334-342 (15)031-(01)032 (03)042-(16)042 (23)053-(20)054 (01)055-(21)055 (02)056-(22)056 (07)057-(00)058 (11)103-(00)104 (12)175-(22)175 (08)298-(00)299 (09)333-(00)334 (12)344-(03)345 2011 99 108-111,255-258 (14)194-(00)195 none (05)213-(15)213 (16)262-(03)263 (05)335-(15)335 (17)348-(00)349 (07)350-(06)351 (08)360-(00)361 2012 99 26-28,167-168, (10)004-(00)005 none 275-277,366 (17)040-(00)041 (08)087-(23)087 (10)142-(01)143 (10)143-(03)144 (03)145-(23)145 (03)146-(17)146 (02)148-(23)148 (02)149-(00)150 (12)158-(00)159 (09)161-(04)162 (06)164-(23)164 (01)165-(08)165 (02)170-(12)170 (03)175-(11)175 (17)183-(04)184 (01)188-(09)188 (05)192-(15)192 (01)193-(14)193 (02)195-(13)195 (09)198-(02)199 (10)206-(06)207 (12)249-(00)250 (15)270-(00)271 (04)339-(00)340 2013 95 54-56,104-106,149- (22)023-(15)024 none 154,157-161,312-313, (07)051-(05)052 326-327,343-345,346- (12)053-(01)054 347 (08)056-(00)057 (10)064-(17)064 (17)065-(02)066 (08)099-(00)100 (05)100-(01)101 (10)101-(23)101 (18)132-(16)133 (19)134-(16)135 (07)136-(03)137 (19)148-(02)149 (23)154-(06)155 (17)218-(02)219 (05)323-(12)323 (10)345-(05)346 (08)356-(15)356 (01)358-(10)358 (05)362-(16)362 2014 93 123-125,127-132,134- (09)037-(16)037 none 140,143-146,165-167, (09)052-(03)053 171-172,192-195,284- (20)125-(05)126 287,314-316 (09)126-(00)127 (21)160-(10)161 (15)161-(02)162 (22)162-(15)163 (18)167-(16)168 (15)281-(23)281 (10)305-(09)306 (17)313-(00)314 2015 95 20-23,61-63,84-85, (07)012-(15)012 none 103-106,152-155,237- (07)026-(05)027 239,331-334,365 (07)040-(17)040 (09)041-(16)041 (15)063-(22)063 (00)064-(11)064 (08)070-(01)071 (01)079-(14)079 (15)081-(22)081 (18)082-(04)083 (08)100-(15)100 (17)107-(03)108 (05)108-(15)108 (08)109-(20)109 (23)115-(09)116 (09)125-(16)125 (08)145-(00)146 (08)160-(15)160 (09)170-(16)170 (02)178-(16)178 (02)179-(16)179 (09)183-(16)183 (07)185-(16)185 (00)186-(16)186 (15)190-(22)190 (07)191-(22)191 (02)201-(09)201 (23)201-(16)202 (01)203-(16)203 (07)206-(16)206 (02)207-(16)207 (10)208-(19)208 (03)213-(16)213 (02)214-(15)214 (15)219-(22)219 (07)226-(16)226 (22)227-(17)228 (00)236-(15)236 (09)240-(16)240 (01)249-(16)249 (22)310-(06)311 2016 95 36-48,53-60,366 (09)027-(16)027 none (06)035-(00)036 (02)262-(16)262 (13)274-(09)275 (12)282-(11)283