QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Salina Cruz Latitude: 16 09.6N Country : Mexico Longitude: 095 12.2W JASL # : 394A Time Meridian: 090W (GMT - 6 hr) GLOSS # : none TOGA #: none NODC #: 71096501 Contributor : Servicio Mareografico Nacional Instituto de Geofisica Universidad Nacional Autonoma de Mexico 04510 Mexico, D. F. MEXICO Originator : same Original Data: analog Instrmnt Type: standard gauge with float and stilling well Digitzd Intvl: hourly to tenths of feet Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot sample on the hour from the analog roll 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 1952 - 28 Feb 1991 Gaps > 1 mon : 01 May 1969 - 01 Nov 1969;01 May 1970 - 24 Mar 1971 07 Apr 1974 - 03 Jun 1974;01 Jan 1978 - 01 Mar 1979 01 Nov 1979 - 01 Mar 1983;01 Jul 1983 - 01 Dec 1983 27 Jan 1985 - 27 Feb 1985;07 Jul 1986 - 01 Dec 1986 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1952-1991 Refernce Levl: The data are referred to tide staff zero which is linked to fixed bench marks. Comment : The daily and monthly values do not reveal any obvious reference level shifts or trends, except the levels are anomalously high in Mar-Jun 1983 relative to nearby sites. Due to gaps on either side, no clear jump can be identified. The data contain great energy with periods of days to weeks during the winter months associated with wind effects and the ocean eddies in the Gulf of Tehuantepec. The timing is bad for almost the entire year of 1957 and sporadically during the other periods. Notable episodic events: 23-25 May 1960: Tsunami from S.C. Chile 28 Mar 1964: Tsunami from Alaska CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1952 75 none none none 1953 100 none (21)121-(05)122 none 1954 100 none (22)147-(06)148 315-316 1955 99 308-309 (13)036-(20)036 50,60-61,191,229 (04)061-(11)061 (09)166-(23)166 (06)182-(18)182 (07)258-(18)258 (09)270-(20)270 (01)335-(20)335 1956 100 none (19)106-(15)107 none (03)136-(20)136 (13)158-(06)159 (17)160-(08)161 (11)297-(23)297 1957 100 none none 1-360 1958 100 none (12)184-(23)184 139 (00)193-(11)193 (12)195-(23)195 (12)196-(23)196 (12)197-(23)197 (12)228-(06)229 (12)241-(23)241 (00)256-(11)256 (12)265-(23)265 (12)347-(23)347 1959 100 none (01)160-(11)160 4-5,9,13-14,23-24, (15)170-(04)171 34-35,42-45,48-49, (14)179-(23)179 214-215,272-273 (14)190-(23)190 (15)203-(02)204 (00)247-(07)247 (09)248-(05)249 (00)281-(11)281 (14)230-(22)230 1960 100 none (01)153-(10)153 137-138,144-147 (12)153-(23)153 (12)177-(23)177 (00)217-(11)217 (12)224-(20)224 (09)313-(21)313 (00)321-(21)321 (15)326-(23)326 1961 100 none (12)039-(23)039 204-205,302 (12)163-(22)163 (12)175-(23)175 (00)181-(11)181 (12)188-(23)188 (12)195-(23)195 (13)203-(23)203 (00)224-(21)224 1962 100 none (13)185-(23)185 none (13)189-(23)189 (14)190-(23)190 (11)191-(23)191 (12)198-(23)198 (12)208-(07)209 (00)214-(11)214 (00)280-(11)280 (00)303-(22)303 1963 100 none (17)110-(12)111 none (20)113-(04)114 (12)118-(23)118 (04)139-(23)139 (12)181-(23)181 (05)231-(03)232 (12)225-(23)225 (08)230-(23)230 1964 100 none (03)075-(23)075 89-90 (01)092-(12)092 (00)120-(20)120 (00)131-(11)131 (08)163-(23)163 (10)187-(17)187 (00)189-(11)189 (00)234-(10)234 (05)250-(15)250 (09)255-(23)255 (00)272-(09)272 (07)337-(23)337 (00)360-(11)360 (00)361-(18)361 1965 100 none (09)025-(23)025 none (12)036-(20)036 (00)037-(12)037 (01)097-(21)097 (08)167-(06)168 (03)192-(22)192 (12)207-(23)207 (12)211-(20)211 (12)212-(23)212 (07)235-(23)235 (00)255-(11)255 1966 100 none (00)228-(11)228 none (09)270-(16)270 (01)291-(11)291 (00)118-(11)118 (00)227-(11)227 1967 100 none (06)012-(23)012 133-134 (00)141-(11)141 (16)153-(23)153 (00)180-(11)180 (03)184-(11)184 (18)201-(07)202 (04)204-(23)204 (09)228-(17)228 (00)237-(11)237 1968 100 none (00)072-(10)072 125-126,140-141,241 (12)105-(07)106 (21)180-(08)181 (12)196-(08)197 (20)299-(11)300 (03)319-(23)319 (18)338-(11)339 (21)339-(08)340 1969 50 121-305 (01)003-(10)003 48 (04)029-(23)029 (01)040-(21)040 (06)046-(23)046 (03)053-(23)053 (18)068-(09)069 (18)082-(15)083 (02)357-(10)357 1970 33 121-365 (04)050-(11)050 11,45 (21)052-(06)053 (03)063-(19)063 1971 78 1-83 (01)121-(11)121 165-169 (15)195-(02)196 (18)233-(03)234 (19)235-(07)236 (09)251-(16)251 (12)221-(23)221 1972 100 none (17)159-(00)160 23-25,309-319 (08)185-(23)185 (18)208-(05)209 (04)295-(20)295 (00)326-(11)326 (16)326-(09)327 1973 100 none (13)133-(20)133 none (04)158-(11)158 (00)179-(11)179 (16)179-(23)179 (03)211-(23)211 (16)243-(23)243 1974 84 97-154 (07)029-(19)029 none (02)030-(21)030 (09)227-(23)227 (04)292-(11)292 (10)306-(18)306 (06)309-(23)309 (13)312-(23)312 (07)333-(22)333 (12)336-(23)336 (00)342-(11)342 (08)349-(20)349 (15)257-(22)257 (00)287-(10)287 (03)289-(17)289 1975 100 none (16)020-(02)021 220-235 (16)034-(23)034 (22)067-(11)068 (21)072-(05)073 (21)180-(11)181 (14)185-(23)185 (12)244-(19)244 (02)248-(09)248 1976 100 none (15)021-(07)022 347-355 (18)076-(06)077 (22)136-(05)137 (21)154-(05)155 (14)211-(23)211 (03)232-(11)232 (00)237-(11)237 (15)252-(23)252 (18)269-(06)270 (00)328-(11)328 1977 100 none (00)087-(08)087 42-44,67-69,141-142, (18)094-(01)095 183-184,275-276 (01)121-(18)121 (16)213-(11)214 (02)238-(11)238 (14)240-(23)240 (03)243-(15)243 (01)275-(23)275 (07)277-(20)277 (03)301-(21)301 (12)313-(23)313 (01)193-(09)193 (08)264-(19)264 1978 0 1-365 none none 1979 84 1-60,305-365 (23)110-(09)111 60-66,117-120,123- (01)152-(17)152 125,133-136,138, 155-156 1980 0 1-366 none none 1981 0 1-365 none none 1982 0 1-365 none none 1983 42 1-60,182-335 (10)157-(20)157 none (01)091-(17)091 1984 100 none (02)083-(11)083 none (01)173-(23)173 (21)247-(07)248 (12)297-(23)297 (04)331-(11)331 (03)351-(12)351 1985 86 27-58,150-169 (08)120-(16)120 116,212-213,222-224, (01)137-(08)137 236-238,251-252,285- (14)147-(21)147 290 (01)177-(10)177 (12)181-(23)181 (15)278-(06)279 (21)339-(04)340 1986 60 188-335 (03)098-(11)098 135-140,143-146, (03)125-(11)125 183-187 (13)126-(09)127 (21)127-(07)128 (16)130-(08)131 (19)134-(15)135 (00)136-(07)136 (19)136-(07)137 (19)146-(08)147 (14)149-(23)149 (06)164-(14)164 (17)352-(04)353 (10)365-(18)365 1987 99 89-93 (14)044-(23)044 1-2,60-61,81-82 (13)082-(23)082 (06)105-(17)105 (16)107-(23)107 (04)115-(11)115 (22)115-(05)116 (15)118-(23)118 (22)134-(05)135 (11)145-(18)145 (02)167-(10)167 (13)174-(05)175 (02)206-(10)206 (12)208-(23)208 (01)209-(11)209 (14)210-(07)211 (12)213-(20)213 (00)221-(08)221 (08)269-(17)269 (21)325-(05)326 (00)328-(07)328 (10)341-(21)341 (12)352-(05)353 (02)357-(10)357 (16)359-(03)360 (21)364-(06)365 1988 47 74-267 (12)002-(01)003 36-41,53-54,63-64, (21)050-(11)051 72-73,331-332 (00)052-(07)052 (06)061-(16)061 (18)271-(01)272 (12)312-(23)312 (17)352-(04)353 (13)271-(23)271 (08)304-(23)304 1989 100 none (17)111-(03)112 7-8,154 (04)126-(18)126 (22)140-(09)141 (22)148-(15)149 1990 92 307-335 none 280 1991 16 none none none