QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 01 Sep 2015 Station : Buenaventura Latitude: 03 53.4N Country : Colombia Longitude: 077 03.7W JASL # : 085A Time Meridian: 075W (GMT - 5 hr) GLOSS # : 170 Originator #: NODC #: 70073701 Contributor : Instituto de Hidrologia, Meteorologia Y Estudios Ambientales Ministerio de Medio Ambiente Bogota, D.E., Republica de Colombia with assistance (1987-2000) from Atlantic Oceanographic and Meteorological Lab. 4301 Rickenbacker Causeway Miami, Florida 33149 Originator : same Original Data: analog and digital Instrmnt Type: 1953-2011: Standard float and stilling well 2012-: Kalesto radar (RAD) Digitzd Intvl: hourly spot reading (float); 1 min (RAD) Present Data : Hourly, daily, and monthly values obtained by: Hourly : The original data were 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 : 12 May 1953 - 31 Dec 2014 Gaps > 1 mon : 28 Jan 1956 - 17 Apr 1956;01 May 1958 - 01 Jun 1958 01 Jan 1988 - 10 Feb 1988;01 Apr 1988 - 01 May 1988 22 Sep 1989 - 06 Nov 1989;22 Nov 1989 - 07 Oct 1990 18 Feb 1992 - 21 Apr 1992;22 May 2010 - 16 Sep 2010 05 Oct 2010 - 13 Dec 2010;31 Mar 2011 - 13 Jul 2012 25 Oct 2013 - 03 Feb 2014 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1953-2014 Refernce Levl: Zero is mean low tide. The data have been linked to tide staff zero by the originators. However, the following level corrections were applied based on information from the hourly data listings: period value added ( (hour)day/month/year ) to original(mm) --------------------------- --------------- (00)23/11/54-(12)01/12/54 -500 (00)01/05/73-(23)28/02/75 -600 (00)01/11/92-(23)31/12/00 840 Further analysis of the data has led to adjustments of the reference level in separate segments. All suspected shifts showed step function jumps in the plots of hourly residuals and of differences of daily values with the nearest stations. These ad- justments contain uncertainty to a few centimeters. period value added ( (hour)day/month/year ) to original(mm) --------------------------- --------------- (00)12/05/53-(12)27/09/55 260 (13)27/09/55-(19)05/08/60 540 (20)05/08/60-(19)01/10/64 160 (20)01/10/64-(12)12/10/64 480 (13)12/10/64-(23)31/12/64 600 (15)06/02/68-(23)31/12/68 90 (00)01/01/69-(23)22/07/69 190 (13)02/04/02-(12)16/04/02 -230 (00)01/03/05-(23)31/12/10 -120 (13)20/08/07-(23)31/05/10 -140 The updated data set provided for 2000-3/2011 was on a reference level that matched the previous submission prior to the 840 mm adjustment. Thus, the historic series 1953-1999 was set to the most recent reference level by subtracting 840 mm. Hourly data received for 2012-2014 were corrected to the historic zero by adding -162 mm as provided by the originator. Comment : The daily and monthly means of Buenaventura agree well with an adjacent station, Tumaco. The numerous gaps and vaguely visible step functions in the hourly residuals in the 1973 - 1975 and the 1987 - 1991 data attribute to uncertainty in the reference level for those years. The residuals of the hourly data show a large amount of periodic fluctuations due to both the inability of the tidal analysis to resolve completely all the tidal constituents and to phase drifts caused by a variety of possible technical causes; ONLY EXTREME FLUCTUATIONS ARE NOTED BELOW. The timing is exceptionally poor during 2005-2010. A large number of short gaps and glitches have been replaced by linear interpolation using the predicted tides and residuals. Overall, the data set contains numerous gaps, timing shifts, interpolated short segments (less than a day), and questionable stability of the reference level which has been adjusted as noted above. Comparison with AVISO altimeter 1992-2014 suggest the reference level stability during this period is good. GPS Coorindates: 03.890278 -077.062167 08 Nov 2012 CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1953 61 213-214,274-283 (19)167-(17)168 261-264 (12)208-(23)208 (05)238-(22)238 (05)268-(19)268 (07)270-(19)270 (22)327-(06)328 1954 82 21-22,114-117,127- (18)037-(04)038 none 129,200-212,222-251, (19)038-(04)039 257-275,321-323 (15)045-(22)045 (06)050-(18)050 (08)052-(15)052 (06)067-(13)067 (03)074-(19)074 (04)076-(11)076 (15)076-(23)076 (04)077-(23)077 (06)078-(13)078 (07)080-(22)080 (09)081-(23)081 (09)082-(17)082 (15)089-(22)089 (02)090-(09)090 (15)090-(23)090 (05)093-(12)093 (04)094-(14)094 (07)098-(17)098 (10)099-(17)099 (22)100-(06)101 (12)101-(23)101 (03)105-(11)105 (16)105-(23)105 (07)106-(00)107 (09)109-(22)109 (08)110-(22)110 (10)112-(23)112 (02)119-(23)119 (05)123-(22)123 (04)124-(13)124 (06)125-(13)125 (19)126-(03)127 (05)133-(00)134 (03)134-(21)134 (03)135-(16)135 (22)265-(20)266 (07)274-(17)274 (10)276-(22)276 (03)325-(15)325 (03)326-(18)326 1955 97 204-211,244-245, (14)031-(23)031 9-10,40-41,55-56, 274-276 (12)071-(01)072 71-72,82-83,146-147, (17)083-(00)084 201-202,231-233,246- (06)086-(18)086 265,319-322,332-335, (11)090-(21)090 340-342,356-365 (07)103-(18)103 (16)132-(01)133 (09)159-(00)160 (19)269-(14)270 (13)335-(21)335 1956 74 1-7,28-108,181-184, (17)131-(14)132 11-16,112-120,143- 266-267,360-366 (00)142-(22)142 181,219-225,249-250, (00)147-(18)147 353-360 (02)216-(21)216 (13)228-(20)228 (09)234-(19)234 (02)235-(18)235 (10)239-(21)239 (00)242-(18)242 (06)243-(23)243 (05)256-(21)256 (11)305-(20)305 (11)306-(18)306 1957 92 1-2,18-20,22-25,112- (13)020-(20)020 2-5,17-18,32-40,46- 113,170-172,175-177, (07)021-(21)021 53,75-81,104-107, 184-185,191-192,265- (04)026-(22)026 136-137,286-288 268,271-273,305-306, (01)027-(22)027 320-327 (02)028-(19)028 (02)029-(20)029 (09)055-(16)055 (14)060-(21)060 (11)091-(20)091 (11)174-(19)174 (07)221-(22)221 (10)222-(18)222 (07)238-(22)238 (06)239-(22)239 (08)242-(22)242 (03)245-(21)245 (13)256-(21)256 (11)264-(01)265 (09)269-(17)269 (01)274-(21)274 (15)288-(22)288 (11)289-(21)289 (03)301-(22)301 (07)302-(22)302 (12)303-(21)303 (11)304-(22)304 (09)360-(22)360 (09)361-(20)361 (06)362-(14)362 (04)363-(13)363 (06)364-(21)364 (06)365-(15)365 1958 92 121-152 (16)256-(23)256 19-21,66-69,125-126 (17)297-(07)298 (09)301-(22)301 (11)351-(23)351 1959 100 none (10)261-(17)261 86-87 1960 99 218-219 (06)069-(17)069 218-219 (20)068-(04)069 1961 100 none none 49-50,76-77,209-215 1962 100 none (10)170-(21)170 67-68,97-98,151,228- (00)241-(10)241 232,258-260 (22)242-(06)243 (12)243-(21)243 (23)265-(17)266 1963 100 none (22)349-(06)350 none 1964 99 282-284 (14)048-(23)048 324-325 (08)100-(17)100 (05)153-(13)153 (12)180-(22)180 (09)199-(23)199 (23)290-(06)291 (18)336-(08)337 1965 100 none (15)021-(22)021 none (18)067-(03)068 (00)185-(08)185 (12)335-(20)335 1966 99 258-259 (05)067-(12)067 none (10)066-(23)066 (18)095-(05)096 (04)192-(23)192 (01)194-(09)194 (20)352-(07)353 1967 98 181-182,205-206,285- (22)112-(18)113 216-219 286,288-289 (17)137-(13)138 (02)146-(19)146 (00)151-(17)151 (02)175-(21)175 (05)178-(04)179 (14)274-(11)275 (18)299-(12)300 (22)300-(13)301 (06)317-(18)317 (06)322-(19)322 (02)332-(19)332 (13)353-(20)353 (05)357-(13)357 (03)358-(14)358 1968 99 91-92,104-105, (11)018-(21)018 none 230-231 (08)025-(15)025 (03)026-(17)026 (14)064-(04)065 (17)086-(16)087 (02)116-(21)116 (23)151-(14)152 (05)230-(13)230 (05)231-(04)232 (03)234-(11)234 1969 94 29-30,182-203 (18)022-(12)023 254,259-260 (15)056-(14)057 (13)081-(11)082 (17)149-(12)150 (05)213-(21)213 (19)237-(06)238 (10)282-(18)282 1970 96 159-161,172-174,179- (05)202-(23)202 none 180,260-262,342-345, (04)203-(13)203 355-356,362-363 (17)260-(13)261 (18)261-(14)262 (07)293-(20)293 (12)354-(20)354 1971 90 81-82,88-91,107-112, (01)121-(17)121 33-35 113-119,127-128,132- (18)141-(13)142 134,136-137,139-140, (05)149-(13)149 144-145,147-148,160- (09)158-(19)158 162,164-167,177-179, (06)168-(14)168 308-310,338-341 (14)169-(21)169 (06)176-(14)176 (16)177-(04)178 (14)303-(21)303 (18)304-(23)304 (01)305-(13)305 (06)310-(13)310 (10)314-(18)314 (23)329-(06)330 (04)335-(22)335 (06)354-(14)354 (18)354-(04)355 (07)355-(15)355 (10)358-(17)358 (00)360-(17)360 (16)360-(11)361 (13)360-(23)360 (08)360-(20)360 (04)361-(23)361 1972 98 27-33,61-62 (12)001-(00)002 none (04)002-(14)002 (06)003-(14)003 (08)006-(15)006 (20)006-(14)007 (12)010-(20)010 (00)011-(08)011 (04)015-(11)015 (06)018-(13)018 (18)020-(14)021 (23)023-(06)024 (01)026-(08)026 (02)028-(11)028 (05)030-(12)030 (08)212-(15)212 (07)245-(14)245 1973 79 60-71,80-82,87-92, (09)029-(21)029 8,198,312-313,335- 105-125,127-128,135- (07)030-(15)030 360 139,147-153,156-157, (09)070-(16)070 179-182,194-195,209- (04)075-(21)075 210,215-216,240-248, (07)086-(18)086 273-275,280-282,292- (11)095-(23)095 293,296-298,315-330, (05)100-(15)100 335-336 (13)103-(21)103 (22)133-(19)134 (14)142-(21)142 (05)143-(22)143 (13)144-(21)144 (08)145-(20)145 (02)146-(22)146 (09)168-(19)168 (09)172-(20)172 (10)173-(20)173 (07)176-(15)176 (08)178-(15)178 (09)199-(19)199 (11)206-(21)206 (07)211-(20)211 (09)232-(17)232 (04)271-(16)271 (22)272-(14)273 (12)295-(22)295 (10)301-(17)301 (23)302-(21)303 (06)305-(20)305 (07)333-(16)333 (15)334-(23)334 (06)352-(18)352 (10)360-(19)360 (01)361-(21)361 1974 80 57-58,76-77,89-90, (02)109-(11)109 36-55,77-78,155-156, 117-126,181-182,195- (04)110-(11)110 170-174,184 196,200-213,221-227, (06)115-(15)115 231-244,254-255,257- (05)142-(04)143 258,263-274,284-286, (15)148-(14)149 290-300,325-330,334- (07)159-(15)159 335,355-356 (21)192-(15)193 (18)197-(15)198 (18)198-(15)199 (06)230-(19)230 (09)261-(20)261 (05)283-(12)283 (19)287-(18)288 (05)301-(18)301 (20)310-(16)311 (21)320-(04)321 1975 89 22-23,28-30,44-60, (04)001-(16)001 24-28,253-256,280- 83-85,88-91,112-113, (10)003-(21)003 284,344-346 118-122,143-145,151- (05)011-(15)011 153,180-181,211-212, (23)013-(15)014 327-329,356-358 (19)016-(14)017 (13)024-(22)024 (09)031-(22)031 (12)055-(19)055 (08)087-(16)087 (08)102-(16)102 (08)106-(19)106 (00)108-(14)108 (00)110-(15)110 (12)114-(21)114 (02)115-(18)115 (05)136-(18)136 (05)139-(13)139 (19)142-(18)143 (05)146-(13)146 (05)148-(19)148 (05)150-(14)150 (12)244-(21)244 (05)267-(18)267 (10)295-(19)295 (09)303-(22)303 (10)305-(21)305 (05)323-(20)323 (16)334-(23)334 (01)335-(14)335 (15)342-(22)342 (04)344-(11)344 1976 99 28-29,48-61 (15)048-(13)049 146-150,194-196 (17)081-(04)082 (15)050-(03)051 1977 99 1-2 (02)068-(11)068 100,229-235 (05)097-(23)097 (02)107-(22)107 (15)187-(23)187 (08)245-(22)245 1978 86 30-32,39-47,145-159, (08)174-(20)174 70,122,127-128,231- 173-177,203-210, 233,274-276 248-265 1979 99 189-190 (06)354-(23)354 221-223,251-253, (03)355-(23)355 309-310 1980 100 none none 13,16-21,23-24,74- 76,79-80,100-103, 109-110,135-137,170- 171,184,211-213,220- 222,230-231,245,259- 260,280-283,285-289, 301,311,313-314,316- 324,338-342,348-351, 353-354,357,360-361 1981 100 none none 1-4,12-13,15-16,21, 26-28,30-32,35,40- 41,43-48,50-54,75- 77,85-87,94-99,101- 102,113-115,137,149- 158,165-167,173-174, 179-184,195-197,200- 202,210-212,214-216, 218,210-217,219,221- 223,249,259-264,268, 272-280,283-293,303- 305,315-322,327-334, 339-345,362-365 1982 100 none (14)157-(00)158 1,21-23,32-33,37-39, 57,64,66-67,70,74- 75,82-83,86-89,96- 97,100-102,115-123, 127,129,131-132,134- 135,163-164,174-175, 195-197,201-203,216- 217,219-220,225-227, 235,258-264,268,272, 274,287-294,303-306, 315-318,323,333-336, 351-352,357 1983 100 none (11)047-(08)048 2-6,37-38,41-42,57, 61-62,65-66,68-70, 80,87-90,95,106,112- 113,117-119,124,127- 131,135-138,141-150, 152-155,159-160,163, 165-170,172-175,189, 220-221,223,224,238, 248,250-251,257-258, 267,271,274,277-281, 300-302,305-306,309- 310,314,318-323,336, 340-342,349-354 1984 100 none (12)006-(23)006 1-3,14,38,40,43,52, 77,79-84,86-88,96- 98,106-107,110-114, 123-125,138-139,151, 160-161,164-166,182, 209,224-226,229,233- 234,238-244,270-272, 299-302 1985 100 none (05)298-(16)298 13,82-88,92-101,158- (16)335-(05)336 159,175-177,202-206, 230-234,247-248,256- 258,261-265,276-279, 300-304,306-308,313- 314,316-318,321-322, 324-325,328-333,345- 347,351-354,363-365 1986 100 none none 1-2,11-12,18-19,22- 25,28,31-33,41-44, 56-62,74-77,84-85, 90,96-97,100-101, 104-106,122-123,129, 141-150,152,158,161- 162,165-166,172-174, 177-178,182-190,197- 199,204,207,224-229, 231-234,245-246,248- 254,257-258,265-266, 273-296,302-305,310- 313,317-319,322-325, 330-340,348-365 1987 82 38-42,63-83, (16)028-(01)029 2-4,9,11-13,16-18, 110-121,145-147, (10)030-(17)030 25-30,33-38,43-46, 235-249,251-252, (21)033-(05)034 49-50,55-57,61-63, 257-267,284-305, (05)047-(14)047 84-110,121-142, 308-313 (07)051-(22)051 148-170,175-182, (05)052-(13)052 185-199,204-210,213- (04)058-(14)058 221,226,228-229,235, (14)060-(22)060 254-257,267-283,320- (04)068-(15)068 337,344-347,352-356, (23)085-(21)086 360-365 (05)087-(16)087 (20)089-(16)090 (17)097-(12)098 (15)152-(12)153 (13)212-(19)212 (14)268-(21)268 (13)272-(21)272 (06)280-(18)280 (16)335-(12)336 1988 80 1-41,92-122, (19)077-(17)078 41-54,62-92,122-160, 176-177,275-277, (00)174-(14)174 163-164,166,170-172, 293-296 (01)276-(18)276 175-187,195-201,209- (03)284-(14)284 217,227-245,253-366 (23)322-(13)323 1989 70 180-204,265-310, (11)016-(03)017 1-2,4-19,22-23,26- 326-365 (05)039-(16)039 33,39,41-44,47-60, (02)126-(13)126 67-73,77-91,96-117, (16)149-(10)150 121-132,142-155,160- (19)175-(14)176 171,175,204-205,208, (18)179-(12)180 213-220,233-235,238- (17)206-(15)207 257,260-261,315-318 (17)252-(16)253 (05)260-(04)261 (06)316-(15)316 (06)317-(15)317 (20)318-(13)319 1990 20 1-280,305-314 (21)302-(07)303 283-284,290-293,315- 322,325-365 1991 97 1-10,207-208 (19)102-(12)103 1-120,150-152,206, (21)120-(23)120 223-225,265-270, (02)186-(12)186 329-334 (21)200-(12)201 (05)204-(04)205 (05)209-(04)210 1992 72 50-112,275-314 (00)119-(12)119 227,240-245 (17)187-(05)188 (12)213-(23)213 (14)222-(12)223 (03)252-(12)252 (01)259-(12)259 (12)269-(12)270 (17)326-(13)327 1993 99 276-278 none 40-43,69-71,159, 207,222,245-246 1994 99 151-152,226-227 (03)004-(12)004 11-12 (23)058-(08)059 (03)073-(16)073 (06)088-(14)088 (14)112-(00)113 (19)139-(03)140 (07)160-(14)160 (14)248-(09)249 (18)280-(03)281 (13)309-(20)309 (18)354-(04)355 1995 100 none (11)001-(21)001 94,220-226,242-243, (04)002-(18)002 269,301-302,356-358 (01)048-(10)048 (05)050-(12)050 (17)108-(12)109 (13)136-(20)136 (21)137-(08)138 (19)138-(12)139 (21)142-(12)143 (00)286-(11)286 (16)286-(04)287 1996 97 33-39,215-220 (11)211-(19)211 39,101-102,125-128, (01)245-(11)245 272-275 1997 100 none none 83-85,204-205,232- 234,260-263,290-292 1998 100 none none 1-2,116-119,145-146, 263-264 1999 100 none none none 2000 94 122-138,146-148, (05)213-(04)214 145,155,185,188-189, 155-160 214-216 2001 100 none (15)008-(13)009 none (19)220-(06)221 2002 99 263-267 (05)337-(04)338 none 2003 98 180-183,304-305, (11)050-(06)051 275-304 362-365 (23)078-(12)079 (15)142-(05)143 (19)147-(05)148 (13)155-(21)155 (21)172-(08)173 (22)261-(05)262 (14)263-(21)263 (10)272-(21)272 (14)293-(21)293 (10)302-(21)302 2004 86 1,18-20,22-32,42-45, (10)033-(05)034 none 197-198,223-224,227- (10)048-(17)048 228,294-296,304-314, (14)056-(05)057 342-345,348-366 (10)072-(09)073 (23)097-(14)098 (00)100-(11)100 (22)126-(12)127 (18)132-(05)133 (23)155-(14)156 (04)186-(15)186 (18)186-(05)187 (06)194-(04)195 (08)219-(06)220 (16)233-(04)234 (15)244-(04)245 (22)267-(11)268 (22)293-(05)294 (17)298-(06)299 (21)302-(14)303 (06)323-(05)324 2005 89 1-4,19-43,46-47,59- (05)010-(04)011 237-238,245-263, 64,77-80,140-142, (10)011-(05)012 278-281,307-309 292-293 (14)051-(05)052 (21)091-(04)092 (02)104-(12)104 (22)143-(08)144 (14)159-(13)160 (05)175-(12)175 (00)220-(09)220 (14)304-(12)305 2006 95 33-40,47-49,210-211, (17)017-(04)018 299 300-304,315-317 (17)044-(12)045 (18)076-(03)077 (22)199-(10)200 (00)202-(12)202 (13)298-(23)298 2007 99 68-71,295-296 (21)006-(08)007 60-324 (22)007-(12)008 (14)009-(12)010 (21)010-(04)011 (14)291-(22)291 (14)323-(22)323 2008 99 68-70,113-115 (14)008-(12)009 25-31,157-162,238- (15)126-(02)127 240,260-270,299- (16)235-(23)235 311 (04)275-(15)275 (22)311-(13)312 2009 92 31-49,58-61,75-76, (15)026-(12)027 68-70,127-132 227-229,260-265,365 (23)054-(17)055 (05)062-(13)062 (21)068-(07)069 (02)073-(09)073 (02)074-(09)074 (14)074-(21)074 (01)219-(10)219 (17)222-(02)223 (05)223-(16)223 (05)267-(12)267 (15)271-(13)272 (13)273-(12)274 (16)279-(11)280 (14)280-(12)281 (14)288-(12)289 (05)295-(14)295 (17)295-(03)296 (16)305-(12)306 (20)324-(12)325 (14)326-(12)327 (14)332-(10)333 (15)333-(23)333 (03)334-(11)334 (18)334-(01)335 (00)339-(20)339 2010 44 1,4-9,25-26,31-32, (23)032-(12)033 2-4,16-17,31,38-42, 33-34,60-64,90-91, (13)035-(12)036 51,64,66,77-83 142-259,278-347 (19)036-(12)037 (04)054-(12)054 (05)055-(12)055 (02)065-(12)065 (05)066-(12)066 (14)079-(23)079 (05)083-(12)083 (05)084-(12)084 (17)084-(12)085 2011 25 90-365 (20)054-(07)055 none (15)063-(14)064 (17)066-(04)067 (17)067-(04)068 (01)076-(08)076 (15)077-(01)078 (05)079-(13)079 2012 43 1-195,198-206,243- (21)213-(04)214 none 245,251-252,333-335 (19)226-(02)227 (23)228-(08)229 (11)234-(19)234 (07)266-(14)266 (17)273-(11)274 (00)294-(07)294 (20)297-(03)298 (06)335-(05)336 (21)349-(06)350 (14)361-(22)361 2013 79 14-16,86-91,179-182, (20)003-(10)004 none 298-365 (11)006-(00)007 (16)007-(09)008 (14)010-(23)010 (04)011-(13)011 (18)011-(02)012 (21)084-(08)085 (04)129-(12)129 (22)261-(10)262 2014 91 1-34 (22)059-(09)060 none (00)064-(07)064 (18)157-(09)158 (07)200-(18)200 (22)204-(06)205 (01)207-(12)207 (20)222-(09)223 (22)297-(07)298 (00)345-(07)345