186SL0947172117001 397A 19530101 19861231 2756N 11054W 2 00000R 0000 MM 186SL0947272117001 Guaymas Mexico UNAM 186SL094730001 186SL094730002 QUALITY ASSESSMENT OF SEA LEVEL DATA 186SL094730003 by the 186SL094730004 TOGA SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER 186SL094730005 JOINT ARCHIVE FOR SEA LEVEL 186SL094730006 186SL094730007Station : Guaymas Latitude: 27 56.0N 186SL094730008Country : Mexico Longitude: 110 54.0W 186SL094730009JASL # : 397A Time Meridian: 105W (GMT - 7 hr) 186SL094730010GLOSS # : none TOGA #: none NODC #: 72117001 186SL094730011Contributor : Servicio Mareografico Nacional 186SL094730012 Instituto de Geofisica 186SL094730013 Universidad Nacional Autonoma de Mexico 186SL094730014 04510 Mexico, D. F. 186SL094730015 MEXICO 186SL094730016Originator : same 186SL094730017Original Data: analog 186SL094730018Instrmnt Type: standard gauge with float and stilling well 186SL094730019Digitzd Intvl: hourly to tenths of feet 186SL094730020Present Data : Hourly, daily, and monthly values obtained by: 186SL094730021 Hourly : spot sample on the hour from the analog roll 186SL094730022 Daily : 119-point convolution filter (Bloomfield, 1976) 186SL094730023 centered on noon applied to the hourly data 186SL094730024 with respective periods of the 95, 50, and 5% 186SL094730025 amplitude points at 124.0, 60.2, and 40.2 hours 186SL094730026 Monthly: Simple average of all daily values; calculated if 186SL094730027 7 or fewer days are missing 186SL094730028Span of data : 01 Jan 1953 - 31 Dec 1986 186SL094730029Gaps > 1 mon : 05 Jun 1958 - 12 Nov 1958;01 Oct 1963 - 01 Nov 1963 186SL094730030 01 May 1966 - 25 Oct 1968;18 Feb 1970 - 01 May 1970 186SL094730031 01 May 1976 - 01 May 1979 186SL094730032Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 186SL094730033Units : millimeters Missing Data Flag :99999 186SL094730034Refernce Levl: The data are referred to tide staff zero which is 186SL094730035 linked to fixed bench marks. 186SL094730036Comment : The daily and monthly values do not reveal any 186SL094730037 obvious reference level shifts or trends and agree 186SL094730038 reasonably well with Acapulco and Manzanillo. 186SL094730039 186SL094730040 CI MISSING REPLACED GAPS QUESTIONABLE 186SL094730041YEAR (%) DATA OR BAD DATA FLUCTUATIONS 186SL094730042---- --- -------------------- --------------- -------------------- 186SL0947300431953 100 none (20)067-(05)068 none 186SL094730044 (00)204-(11)204 186SL094730045 (00)205-(22)205 186SL094730046 (12)267-(23)267 186SL094730047 (00)338-(11)338 186SL094730048 (12)352-(23)352 186SL094730049 (17)353-(11)354 186SL0947300501954 100 none (17)048-(01)049 none 186SL094730051 (16)060-(03)061 186SL094730052 (04)165-(15)165 186SL094730053 (02)174-(16)174 186SL094730054 (07)178-(19)178 186SL094730055 (15)180-(02)181 186SL094730056 (03)196-(21)196 186SL094730057 (01)200-(22)200 186SL094730058 (12)231-(23)231 186SL094730059 (01)238-(10)238 186SL094730060 (09)251-(19)251 186SL094730061 (17)339-(05)340 186SL094730062 (16)363-(23)363 186SL0947300631955 100 none (15)006-(22)006 none 186SL094730064 (22)054-(08)055 186SL094730065 (02)154-(13)154 186SL094730066 (12)314-(10)315 186SL094730067 (12)316-(23)316 186SL094730068 (15)318-(23)318 186SL0947300691956 94 162-183 (00)168-(11)168 none 186SL094730070 (01)171-(10)171 186SL094730071 (00)222-(10)222 186SL094730072 (20)263-(11)264 186SL094730073 (13)273-(21)273 186SL0947300741957 100 none (13)027-(20)027 263-293,327-328 186SL094730075 (02)145-(09)145 186SL094730076 (04)221-(11)221 186SL094730077 (01)307-(11)307 186SL094730078 (21)359-(07)360 186SL0947300791958 47 3-29,156-316, (00)033-(20)033 none 186SL094730080 351-358 (16)034-(01)035 186SL094730081 (16)341-(23)341 186SL0947300821959 100 none (12)004-(10)005 none 186SL094730083 (01)027-(11)027 186SL094730084 (18)040-(03)041 186SL094730085 (22)108-(05)109 186SL094730086 (02)183-(14)183 186SL094730087 (04)230-(11)230 186SL094730088 (04)273-(23)273 186SL094730089 (02)348-(09)348 186SL0947300901960 100 none (03)010-(11)010 none 186SL094730091 (02)014-(11)014 186SL094730092 (13)024-(08)025 186SL094730093 (03)150-(13)150 186SL094730094 (00)196-(11)196 186SL094730095 (00)220-(11)220 186SL094730096 (00)221-(22)221 186SL094730097 (04)226-(11)226 186SL094730098 (00)248-(11)248 186SL094730099 (12)338-(23)338 186SL0947301001961 100 none (01)031-(23)031 none 186SL094730101 (00)045-(10)045 186SL094730102 (12)153-(10)154 186SL094730103 (12)154-(05)155 186SL094730104 (00)166-(19)166 186SL094730105 (07)170-(15)170 186SL094730106 (00)179-(08)179 186SL094730107 (12)206-(23)206 186SL094730108 (18)207-(04)208 186SL094730109 (00)229-(19)229 186SL094730110 (04)246-(18)246 186SL094730111 (21)332-(04)333 186SL0947301121962 98 358-365 (12)203-(07)204 313-314,331,342-344 186SL094730113 (00)227-(11)227 186SL0947301141963 88 1-12,274-305 (13)023-(01)024 40-41 186SL094730115 (00)031-(11)031 186SL094730116 (09)049-(23)049 186SL094730117 (10)114-(18)114 186SL094730118 (15)146-(02)147 186SL094730119 (00)201-(11)201 186SL094730120 (00)202-(11)202 186SL094730121 (09)212-(23)212 186SL094730122 (12)213-(23)213 186SL094730123 (12)221-(19)221 186SL094730124 (12)324-(04)325 186SL0947301251964 100 none (03)069-(22)069 246-249,266-267 186SL094730126 (21)100-(07)101 186SL094730127 (05)132-(19)132 186SL094730128 (05)136-(23)136 186SL094730129 (04)137-(20)137 186SL094730130 (07)143-(16)143 186SL094730131 (01)222-(19)222 186SL094730132 (03)237-(11)237 186SL094730133 (19)272-(09)273 186SL094730134 (07)275-(18)275 186SL094730135 (05)276-(13)276 186SL094730136 (15)313-(04)314 186SL094730137 (18)317-(06)318 186SL094730138 (05)327-(15)327 186SL094730139 (00)358-(08)358 186SL0947301401965 100 none (18)007-(07)008 none 186SL094730141 (14)078-(01)079 186SL094730142 (03)087-(00)088 186SL094730143 (12)100-(21)100 186SL094730144 (01)107-(16)107 186SL094730145 (09)117-(17)117 186SL094730146 (00)207-(09)207 186SL094730147 (13)214-(20)214 186SL094730148 (02)223-(10)223 186SL094730149 (20)277-(07)278 186SL094730150 (13)294-(21)294 186SL094730151 (02)341-(11)341 186SL094730152 (15)341-(04)342 186SL094730153 (19)357-(02)358 186SL0947301541966 33 121-365 none none 186SL0947301551967 0 1-365 none none 186SL0947301561968 19 1-299 (13)353-(02)354 none 186SL094730157 (12)363-(23)363 186SL0947301581969 100 none none none 186SL0947301591970 80 49-121 (06)194-(19)194 none 186SL094730160 (01)204-(14)204 186SL094730161 (08)207-(23)207 186SL094730162 (09)208-(04)209 186SL0947301631971 100 none (13)129-(22)129 none 186SL094730164 (00)154-(15)154 186SL094730165 (01)159-(14)159 186SL094730166 (01)167-(11)167 186SL094730167 (09)215-(16)215 186SL094730168 (08)225-(20)225 186SL094730169 (02)230-(11)230 186SL094730170 (04)233-(18)233 186SL094730171 (05)235-(13)235 186SL094730172 (19)294-(06)295 186SL094730173 (18)295-(04)296 186SL094730174 (19)297-(11)298 186SL094730175 (06)314-(15)314 186SL0947301761972 100 none (12)092-(23)092 none 186SL094730177 (04)120-(23)120 186SL094730178 (00)200-(16)200 186SL094730179 (00)201-(16)201 186SL094730180 (07)219-(18)219 186SL094730181 (00)220-(11)220 186SL094730182 (00)221-(16)221 186SL094730183 (00)222-(16)222 186SL094730184 (00)223-(16)223 186SL094730185 (00)224-(16)224 186SL094730186 (00)228-(21)228 186SL094730187 (00)232-(09)232 186SL094730188 (12)232-(19)232 186SL094730189 (12)351-(23)351 186SL0947301901973 100 none (13)052-(23)052 none 186SL094730191 (09)062-(19)062 186SL094730192 (12)151-(19)151 186SL094730193 (00)205-(09)205 186SL094730194 (12)205-(01)206 186SL094730195 (12)351-(23)351 186SL094730196 (02)352-(23)352 186SL0947301971974 100 none (15)037-(23)037 62-65 186SL094730198 (15)053-(23)053 186SL094730199 (06)117-(18)117 186SL094730200 (10)152-(23)152 186SL094730201 (13)334-(23)334 186SL0947302021975 100 none (12)069-(23)069 none 186SL094730203 (01)091-(11)091 186SL094730204 (00)202-(11)202 186SL094730205 (15)245-(13)246 186SL094730206 (12)309-(23)309 186SL094730207 (12)310-(04)311 186SL094730208 (14)314-(11)315 186SL094730209 (12)322-(23)322 186SL094730210 (00)332-(16)332 186SL094730211 (12)347-(05)348 186SL0947302121976 33 122-365 (17)016-(11)017 none 186SL094730213 (17)017-(05)018 186SL094730214 (12)075-(23)075 186SL0947302151977 0 1-365 none none 186SL0947302161978 0 1-365 none none 186SL0947302171979 65 1-121,241-250 (00)161-(11)161 201-202 186SL094730218 (12)171-(03)172 186SL094730219 (12)178-(23)178 186SL094730220 (12)254-(03)255 186SL094730221 (00)263-(19)263 186SL094730222 (02)275-(18)275 186SL094730223 (00)282-(22)282 186SL094730224 (00)289-(19)289 186SL094730225 (15)324-(11)325 186SL094730226 (17)326-(11)327 186SL094730227 (18)327-(11)328 186SL094730228 (20)332-(18)333 186SL094730229 (12)335-(23)335 186SL094730230 (12)339-(23)339 186SL094730231 (00)341-(10)341 186SL094730232 (12)342-(23)342 186SL094730233 (12)344-(23)344 186SL094730234 (12)351-(23)351 186SL094730235 (12)353-(23)353 186SL094730236 (12)354-(23)354 186SL094730237 (12)355-(06)356 186SL094730238 (12)356-(06)357 186SL094730239 (12)363-(07)364 186SL094730240 (14)364-(05)365 186SL0947302411980 100 none (07)149-(14)149 163-164,167-168,326- 186SL094730242 (02)152-(11)152 327 186SL094730243 (21)313-(06)314 186SL094730244 (16)316-(23)316 186SL094730245 (20)328-(05)329 186SL094730246 (14)350-(23)350 186SL0947302471981 100 none (16)004-(23)004 166,227-229 186SL094730248 (16)007-(23)007 186SL094730249 (17)020-(07)021 186SL094730250 (12)029-(23)029 186SL094730251 (16)154-(23)154 186SL094730252 (09)156-(16)156 186SL094730253 (15)172-(23)172 186SL094730254 (00)315-(08)315 186SL094730255 (16)317-(23)317 186SL094730256 (19)333-(02)334 186SL094730257 (01)335-(11)335 186SL094730258 (17)335-(03)336 186SL094730259 (10)346-(18)346 186SL0947302601982 100 none (06)001-(03)002 52-53,90-91,113,172, 186SL094730261 (00)034-(11)034 256,317-320 186SL094730262 (03)184-(20)184 186SL094730263 (01)194-(11)194 186SL094730264 (01)244-(20)244 186SL094730265 (12)329-(07)330 186SL0947302661983 95 287-305 (15)025-(23)025 26-29,63,107-108, 186SL094730267 (15)039-(23)039 127-128,193-195, 186SL094730268 (08)092-(19)092 200,322 186SL094730269 (14)099-(22)099 186SL094730270 (15)306-(23)306 186SL094730271 (15)357-(23)357 186SL094730272 (01)358-(11)358 186SL094730273 (15)358-(23)358 186SL0947302741984 100 none (00)193-(11)193 2-3,49-50,58,325-327 186SL094730275 (04)281-(11)281 186SL094730276 (18)299-(06)300 186SL094730277 (00)307-(09)307 186SL094730278 (17)357-(01)358 186SL0947302791985 96 163-169,172-182 none 11-14,61-63,101-102, 186SL094730280 130-131,154,169-172, 186SL094730281 184,198-199,209-213 186SL0947302821986 99 365 (15)011-(23)011 9-13 186SL094730283 (16)055-(09)056 186SL094730284 (12)092-(07)093 186SL094730285 (14)094-(07)095 186SL094730286 (00)219-(11)219 186SL094730287 (15)335-(23)335 186SL094730288 (17)336-(05)337 186SL094730289 (19)340-(10)341 186SL094730290 (16)347-(07)348 186SL094730291 (15)350-(23)350 186SL094730292 (00)354-(11)354 186SL094730293 (16)363-(05)364 186SL094730294 (18)364-(06)365 186SL094730295 186SL094730296 QUALITY ASSESSMENT POLICY 186SL094730297 186SL094730298 The quality assessment is mostly based on the residuals 186SL094730299 (observed data minus predicted tides) of the hourly data. This 186SL094730300 assessment also applies to the daily and monthly data since 186SL094730301 they were derived from the quality-controlled hourly data. 186SL094730302 186SL094730303 The following abbreviations are used in the assessment: 186SL094730304 JASL - Joint Archive for Sea Level; GLOSS - Global Sea Level 186SL094730305 Observing System; TOGA - Tropical Ocean Global Atmosphere 186SL094730306 research program; NODC - National Oceanographic Data Center; 186SL094730307 Instrmnt - instrument; Digitzd Intvl - digitized interval; 186SL094730308 Gaps > 1 mon - missing data in a span greater than one month; 186SL094730309 Refernce - reference. 186SL094730310 186SL094730311 The following corrections are made to the hourly data 186SL094730312 prior to this assessment: 186SL094730313 1) Gaps or obviously wrong data points in a span less than 186SL094730314 25 hours are filled by the predicted tide method*. 186SL094730315 2) Timing errors of exact increments of an hour are corrected 186SL094730316 by shifting the data. 186SL094730317 3) Reference level shifts are only corrected after information 186SL094730318 from tide staff readings or comparative readings with a fixed 186SL094730319 bench mark are checked to verify that the shift was not a 186SL094730320 natural event. If comparative readings are missing or 186SL094730321 incomplete, comparisons of the data with nearby stations 186SL094730322 may warrant the adjustment of some obvious shifts. 186SL094730323 4) Data with unresolved datum shifts are not disseminated. 186SL094730324 However, if sufficient time spans of data are available before 186SL094730325 or after the year(s) with the unresolved shift(s), a subset of 186SL094730326 quality assured data is made available. Thus, the Span field 186SL094730327 in the Quality Assessment may not match the span of the 186SL094730328 distribution data set. As the questionable datum shifts are 186SL094730329 resolved, the data set will be updated. Although this policy 186SL094730330 adds some complexity, it allows more rapid dissemination of 186SL094730331 at least the quality assured years. 186SL094730332 186SL094730333 For each year, the following information is documented from 186SL094730334 the quality-controlled hourly data with dates given as the nth 186SL094730335 day of the year starting from 1 January: 186SL094730336 1) a Completeness Index (CI) based on the percentage of hours 186SL094730337 with available data, 186SL094730338 2) a list of gaps longer than a day, 186SL094730339 3) a summary of days with consecutive missing or obviously 186SL094730340 wrong data in a time span longer than 6 but less than 25 186SL094730341 hours that have been replaced, with hours in parentheses, and 186SL094730342 4) a summary of days with questionable fluctuations in the 186SL094730343 residual series. Fluctuations within the residuals are 186SL094730344 considered significant and are noted if they are greater than 186SL094730345 25 cm. This policy has changed slightly as of October 1992: 186SL094730346 only suspicious fluctuations due to obvious instrumentation 186SL094730347 problems are noted. Minor timing drifts are no longer 186SL094730348 included in the list of questionable days. 186SL094730349 186SL094730350 Note : If the predicted tides poorly model the observed heights 186SL094730351 due to the inability of the tidal analysis to completely resolv 186SL094730352 the non-linear shallow water effects, the residuals are not 186SL094730353 suitable for assessing the data quality. Instead, a subjective 186SL094730354 comment on the quality of the data is provided. 186SL094730355 186SL094730356 *The predicted tides are obtained with the use of a harmonic 186SL094730357 analysis program (Foreman, 1977) which is executed on a year 186SL094730358 of apparently good data for a given station. The Predicted 186SL094730359 Tide Method for filling gaps consists of statistically 186SL094730360 comparing the predicted tides to the observed data and 186SL094730361 shifting the predicted tides in time to correct for timing 186SL094730362 differences. Then the linear interpolation between hourly 186SL094730363 values at the end points of the gap in the residual series is 186SL094730364 added to the corresponding corrected predicted tide data to 186SL094730365 obtain interpolated values over the span of the gap. 186SL094730366 186SL094730367 Bloomfield, P., 1976. Fourier Analysis of Time Series: An 186SL094730368 Introduction. New York: John Wiley and Sons. pp 129-137. 186SL094730369 186SL094730370 Foreman, M., 1977. Manual For Tidal Height Analysis and 186SL094730371 Prediction. Institute of Ocean Sciences, Patricia Bay, 186SL094730372 Victoria B.C. Pacific Marine Science Report 77-10. 186SL094730373 186SL09476 19531 2289000 2328000 2293000 2330000 2381000 2528000 186SL09476 19532 2657000 2633000 2607000 2455000 2347000 2255000 186SL09476 19541 2259000 2320000 2227000 2331000 2406000 2545000 186SL09476 19542 2600000 2571000 2537000 2438000 2310000 2331000 186SL09476 19551 2295000 2238000 2313000 2303000 2368000 2493000 186SL09476 19552 2589000 2554000 2581000 2434000 2302000 2243000 186SL09476 19561 2219000 2165000 2261000 2331000 240700099999999 186SL09476 19562 2551010 2591000 2583000 2463000 2290000 2280000 186SL09476 19571 2260000 2275000 2309000 2328000 2482000 2603000 186SL09476 19572 2690000 2653000 2691000 2535000 2440000 2371000 186SL09476 19581 99999999 2327000 2379000 2316000 249900099999999 186SL09476 19582 999999999999999999999999999999999999999999999999 186SL09476 19591 2401000 2364000 2307000 2440000 2425000 2595000 186SL09476 19592 2613000 2621000 2682000 2578000 2370000 2335000 186SL09476 19601 2229000 2178000 2241000 2290000 2392000 2524000 186SL09476 19602 2607000 2601000 2603000 2530000 2340000 2282000 186SL09476 19611 2287000 2294000 2267000 2319000 2397000 2491000 186SL09476 19612 2617000 2580000 2586000 2460000 2292000 2327000 186SL09476 19621 2250000 2309000 2180000 2339000 2373000 2500000 186SL09476 19622 2583000 2611000 2661000 2542000 240200099999999 186SL09476 19631 99999999 2327000 2266000 2335000 2419000 2541000 186SL09476 19632 2682000 2727000 264800099999999 2407010 2353000 186SL09476 19641 2302000 2202000 2234000 2277000 2322000 2471000 186SL09476 19642 2580000 2597000 2601000 2512000 2322000 2294000 186SL09476 19651 2296000 2303000 2323000 2369000 2411000 2572000 186SL09476 19652 2653000 2712000 2711000 2541000 2475000 2417000 186SL09476 19661 2382000 2228000 2312000 24040009999999999999999 186SL09476 19662 999999999999999999999999999999999999999999999999 186SL09476 19671 999999999999999999999999999999999999999999999999 186SL09476 19672 999999999999999999999999999999999999999999999999 186SL09476 19681 999999999999999999999999999999999999999999999999 186SL09476 19682 99999999999999999999999999999999 2457000 2372000 186SL09476 19691 2401000 2322000 2299000 2404000 2511000 2587000 186SL09476 19692 2662000 2738000 2659000 2576000 2383000 2358000 186SL09476 19701 2280000999999999999999999999999 2418010 2507000 186SL09476 19702 2624000 2642000 2628000 2457000 2363000 2255000 186SL09476 19711 2257000 2274000 2276000 2357000 2401000 2537000 186SL09476 19712 2627000 2650000 2655000 2534000 2382000 2321000 186SL09476 19721 2334000 2306000 2411000 2370000 2488000 2624000 186SL09476 19722 2709000 2715000 2713000 2616000 2560000 2525000 186SL09476 19731 2394000 2366000 2310000 2357000 2435000 2581000 186SL09476 19732 2616000 2567000 2568000 2428000 2355000 2293000 186SL09476 19741 2272000 2218000 2313000 2360000 2457000 2586000 186SL09476 19742 2682000 2652000 2666000 2470000 2370000 2277000 186SL09476 19751 2273000 2291000 2316000 2328000 2378000 2565000 186SL09476 19752 2605000 2627000 2609000 2416000 2363000 2287000 186SL09476 19761 2281000 2268000 2329000 23710009999999999999999 186SL09476 19762 999999999999999999999999999999999999999999999999 186SL09476 19771 999999999999999999999999999999999999999999999999 186SL09476 19772 999999999999999999999999999999999999999999999999 186SL09476 19781 999999999999999999999999999999999999999999999999 186SL09476 19782 999999999999999999999999999999999999999999999999 186SL09476 19791 99999999999999999999999999999999 2412010 2484000 186SL09476 19792 2630000 2586030 2658070 2502000 2328000 2343000 186SL09476 19801 2325000 2367000 2316000 2331000 2425000 2583000 186SL09476 19802 2628000 2629000 2786000 2604000 2441000 2336000 186SL09476 19811 2444000 2329000 2345000 2442000 2542000 2610000 186SL09476 19812 2699000 2706000 2650000 2655000 2458000 2405000 186SL09476 19821 2315000 2385000 2403000 2430000 2537000 2703000 186SL09476 19822 2761000 2743000 2854000 2741000 2682000 2675000 186SL09476 19831 2657000 2507000 2431000 2550000 2686000 2834000 186SL09476 19832 2856000 2818000 285200099999999 2542010 2447000 186SL09476 19841 2454000 2413000 2452000 2465000 2559000 2708000 186SL09476 19842 2757000 2760000 2755000 2629000 2422000 2413000 186SL09476 19851 2385000 2361000 2359000 2440000 252500099999999 186SL09476 19852 2735010 2714000 2718000 2597000 2434000 2360000 186SL09476 19861 2444000 2398000 2373000 2412000 2530000 2623000 186SL09476 19862 2729000 2709000 2729000 2745000 2532000 2418010