QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Valparaiso-A Latitude: 33 02.0S Country : Chile Longitude: 071 38.0W JASL # : 081A Time Meridian: 060W (GMT - 4 hr) GLOSS # : 175 Originator #:0370 NODC #: 53073101 Contributor : Servicio Hidrografico y Oceanografico de la Armada (SHOA) Valparaiso CHILE Originator : same Original Data: analog Instrmnt Type: standard mechanical 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 : 02 Jan 1944 - 24 Feb 1978 Gaps > 1 mon : 03 Nov 1944 - 02 Jan 1945;18 May 1957 - 01 Aug 1957 01 Apr 1974 - 01 Jan 1977 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1944-1978 Refernce Levl: The originators have related the data to tide staff zero which is linked to a fixed set of bench marks. Several segments with obvious shifts have warranted adjustment based on comparisons with Antofagasta and analysis of residuals (observed data minus pre- dicted tides). These adjustements contain uncer- tainty of a few cm. period value added ( (hour)day/month/year ) to original(mm) --------------------------- --------------- (12)03/04/50 - (18)08/04/50 -140 (22)04/05/58 - (23)14/05/58 -200 (18)28/03/67 - (18)01/04/68 -140 (06)10/07/71 - (23)31/12/78 100 Comment : The differences of the daily and monthly values with Antofagasta appear reasonable, exept for level uncertainty in Valparaiso during June - December, 1972. The hourly residuals show a very noisy signal during 1972 that is probably associated with mechanical problems. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1944 84 308-366 none none 1945 99 1 (12)049-(05)050 none (05)247-(23)247 (12)267-(03)268 (00)289-(20)289 (00)320-(22)320 (00)345-(22)345 (04)346-(23)346 (00)351-(21)351 1946 100 none (09)075-(21)075 none (20)082-(05)083 (08)092-(04)093 (04)124-(16)124 (17)153-(06)154 (20)181-(23)181 (12)224-(23)224 (05)235-(23)235 (00)237-(22)237 (08)255-(18)255 (17)284-(02)285 (12)286-(23)286 (12)349-(23)349 (18)355-(08)356 1947 100 none (00)139-(20)139 none (00)142-(22)142 (12)229-(04)230 (19)230-(04)231 (18)256-(07)257 (01)335-(19)335 (18)364-(05)365 1948 100 none (07)001-(23)001 none (07)021-(23)021 (18)073-(16)074 (21)082-(09)083 (21)083-(18)084 (16)087-(11)088 (15)089-(23)089 (14)090-(23)090 (12)104-(23)104 (12)106-(23)106 (07)116-(04)117 (09)157-(16)157 (09)175-(16)175 (12)200-(23)200 (05)220-(02)221 (09)221-(23)221 (09)222-(16)222 (12)241-(05)242 (12)242-(09)243 (11)243-(21)243 (12)344-(10)345 (00)348-(21)348 (15)350-(07)351 (00)353-(22)353 (17)363-(15)364 1949 100 none (05)053-(18)053 none (02)133-(12)133 (02)152-(10)152 (05)190-(15)190 (09)194-(18)194 (05)195-(20)195 (06)204-(23)204 (18)236-(04)237 (16)237-(03)238 (20)238-(05)239 (18)240-(11)241 (19)251-(04)252 (16)264-(11)265 (06)266-(14)266 (19)267-(05)268 (18)294-(05)295 (18)295-(03)296 (22)311-(06)312 (13)335-(23)335 1950 100 none (12)021-(20)021 225-242 (19)091-(06)092 (18)097-(04)098 (12)139-(22)139 (08)140-(20)140 (06)284-(15)284 (07)325-(23)325 1951 100 none (16)115-(23)115 none (00)183-(09)183 (19)242-(02)243 (18)256-(11)257 (00)307-(20)307 (07)336-(23)336 1952 100 none (12)310-(21)310 none (20)134-(14)135 (17)262-(07)263 (19)263-(03)264 (22)307-(08)308 1953 100 none (12)047-(21)047 none (12)075-(23)075 (06)076-(15)076 (12)088-(07)089 (20)089-(08)090 (20)209-(05)210 (00)220-(20)220 (02)233-(23)233 (02)234-(23)234 (19)245-(05)246 (10)246-(22)246 (20)276-(18)277 (12)326-(06)327 1954 100 none (02)120-(23)120 none (02)137-(11)137 (01)138-(23)138 (00)164-(18)164 (09)229-(04)230 (08)239-(19)239 1955 100 none (03)020-(23)020 none (22)098-(06)099 (09)101-(23)101 (01)213-(22)213 (22)276-(17)277 (12)335-(04)336 (11)336-(23)336 (18)338-(11)339 1956 100 none (08)012-(19)012 none (08)014-(04)015 (16)066-(11)067 (13)067-(04)068 (00)209-(08)209 (00)229-(21)229 (01)275-(21)275 1957 72 138-213,220-244 (07)096-(05)097 244-288 (07)097-(19)097 (00)098-(11)098 (01)120-(23)120 (19)214-(15)215 1958 99 135-138,152-154 none 94-97 1959 100 none (04)040-(21)040 none (20)043-(03)044 (00)225-(20)225 (00)249-(11)249 (04)296-(23)296 1960 97 140-153 (00)040-(11)040 none (20)082-(03)083 (00)099-(22)099 (20)191-(18)192 (13)201-(11)202 (21)275-(04)276 1961 100 none (22)040-(16)041 none (12)115-(23)115 (01)132-(23)132 (00)151-(22)151 (02)181-(23)181 (16)274-(08)275 1962 100 none (14)146-(22)146 none (16)147-(23)147 (18)157-(11)158 (01)176-(09)176 (14)222-(23)222 (21)238-(04)239 (01)348-(23)348 (22)356-(11)357 1963 100 none (03)036-(11)036 none (20)082-(11)083 (12)120-(23)120 (19)121-(11)122 (00)223-(19)223 (12)224-(23)224 (00)325-(10)325 1964 100 none (00)062-(09)062 none (17)079-(11)080 (20)088-(10)089 (04)120-(11)120 (07)123-(22)123 (03)359-(23)359 1965 100 none (10)183-(18)183 none (09)184-(19)184 (00)222-(21)222 1966 99 209-213 (16)001-(23)001 none (03)216-(23)216 1967 100 none none none 1968 100 none (15)067-(08)068 none (00)137-(10)137 (17)181-(04)182 (12)196-(23)196 (12)198-(23)198 (00)246-(19)246 (13)137-(11)138 (12)196-(20)196 1969 100 none (12)132-(20)132 none (00)345-(21)345 1970 100 none (20)036-(18)037 none (19)046-(16)047 (08)069-(21)069 (04)097-(20)097 (00)145-(09)145 (00)197-(07)197 (00)205-(20)205 (21)208-(19)209 1971 99 285-286 (04)084-(03)085 none (01)091-(22)091 (15)123-(09)124 (12)185-(07)186 (18)189-(11)190 (04)198-(23)198 (19)248-(03)249 (20)249-(03)250 (20)288-(11)289 (18)318-(11)319 1972 98 198-200,265-267 (22)127-(20)128 none (20)188-(11)189 (04)206-(03)207 (12)207-(10)208 (00)252-(21)252 (04)311-(03)312 (05)350-(18)350 1973 93 72-81,107-114,118- (00)002-(22)002 none 122,307-313 (00)036-(11)036 (00)046-(11)046 (02)104-(09)104 (06)117-(17)117 (15)181-(23)181 (12)218-(23)218 (16)242-(06)243 (00)263-(22)263 (06)262-(23)262 1974 24 26-28,91-365 (18)010-(02)011 none (19)011-(04)012 (19)012-(04)013 (15)021-(06)022 (18)022-(09)023 (13)025-(22)025 (18)028-(16)029 (17)067-(14)068 (00)069-(22)069 (13)012-(23)012 (00)070-(21)070 1975 0 1-365 none none 1976 0 1-366 none none 1977 96 253-258,302-312 (10)013-(18)013 none (21)014-(05)015 (12)016-(20)016 (03)017-(23)017 (09)023-(19)023 (02)208-(23)208 (12)217-(23)217 1978 15 none (08)040-(21)040 none (04)046-(23)046