QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Apia-A Latitude: 13 49.0S Country : Western Samoa Longitude: 171 45.0W JASL # : 401A Time Meridian: 165W (GMT - 11 hr) GLOSS # : none TOGA #: none NODC #: 51173101 Contributor : Scripps Institute of Oceanography University of California at San Diego La Jolla, California Originator : unconfirmed Original Data: unconfirmed Instrmnt Type: unconfirmed Digitzd Intvl: unconfirmed Present Data : Hourly, daily, and monthly values obtained by: Hourly : unconfirmed 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 1954 - 31 Dec 1971 Gaps > 1 mon : 01 Nov 1956 - 01 Dec 1956;01 Feb 1957 - 01 Sep 1957 12 Nov 1962 - 30 Dec 1962;17 Jan 1965 - 18 Mar 1965 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : No Operational : No Sat. Trans. : No Distribution : 1954-1971 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed bench marks Comment : The data contain numerous short gaps and periods of poor timing or other instrumental malfunctions. The difference in daily values with Pago Pago reveals a noisy signal, although the mean appears relatively steady. The mean level appears low by about 10 cm 11 Mar - 25 Apr 1962 and by about 7 cm 31 Mar - 22 Jul 1967. Other sharp rises and falls of a few days duration show up as quasi-step functions in the residual but it is not clear if the data are in error. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1954 99 1,26-28,171-174 (02)167-(11)167 none 1955 100 none (10)031-(23)031 none (01)032-(14)032 1956 91 295-297,306-336, (15)081-(13)082 none 365-366 (08)263-(23)263 (13)269-(23)269 (12)270-(23)270 (13)272-(23)272 (15)274-(23)274 (01)275-(23)275 (07)278-(23)278 (08)294-(00)295 (03)302-(23)302 (01)304-(10)304 1957 41 1-5,32-244 none none 1958 100 none (18)091-(16)092 83-85,213-214 (13)212-(23)212 (01)213-(12)213 1959 99 322-326,362-365 none 20-21,351 1960 90 1-20,94-99,153-158, (13)057-(23)057 none 180-183,283-287, (21)088-(14)089 364-366 (00)353-(23)353 1961 99 1-5 (03)014-(11)014 none (00)045-(20)045 (18)323-(11)324 1962 87 316-364 (21)094-(08)095 none (05)193-(12)193 (02)314-(21)314 1963 78 24-26,33-50,56-58, (23)180-(12)181 113-118,197,362-364 117-126,142-145,199- (22)182-(21)183 203,216-221,223-225, (13)202-(21)202 231-232,240-242,277- (07)229-(06)230 287,292-309,311-314, (18)235-(04)236 332-337,358-359 (13)239-(04)240 (01)244-(12)244 (04)257-(12)257 (13)259-(05)260 (07)265-(06)266 (13)327-(06)328 (18)328-(12)329 (20)360-(12)361 (13)364-(06)365 1964 86 1-2,20-25,39-41,68- (13)010-(05)011 none 73,84-89,99-100,103- (13)016-(05)017 121,179-181,199-202, (02)019-(12)019 258-262,263-265, (04)196-(01)197 283-287 1965 74 9-12,17-77,92-97, (16)143-(01)144 none 124-127,147-149,192- (01)201-(21)201 193,243-245,301-309, (23)202-(22)203 313-316,331-333,338- (13)252-(22)252 340,353-355 (07)300-(21)300 (13)308-(04)309 (13)309-(22)309 (03)344-(21)344 (01)361-(21)361 1966 89 10-39,42-45,48-54, (02)059-(22)059 64-65,250-252 65-67,194-195 (07)077-(21)077 1967 98 203-210 (20)231-(03)232 112-117,223,306,334 1968 87 126-127,133-134,147- (01)183-(20)183 264,268 148,154-155,157-158, (00)187-(20)187 161-163,168-169,203- (23)193-(20)194 204,224-225,238-239, (00)197-(20)197 259-260,265-267,273- (03)208-(20)208 275,282-283,287-288, (03)241-(20)241 298-299,301-302,306- (02)250-(20)250 310,317-318,322-325, (03)254-(20)254 336-337,342-345,349- (02)257-(20)257 351,357-358,360-362, (22)261-(20)262 364-366 (13)296-(23)296 (13)316-(20)316 (13)338-(20)338 (13)347-(20)347 (13)353-(20)353 (13)355-(20)355 1969 88 1-4,12-20,26-27,33- (13)006-(21)006 none 35,39-41,46-51,54- (13)008-(20)008 55,61-62,67-69,75- (13)010-(21)010 76,82-83,89-90,172- (13)022-(20)022 175,179-182,319-326 (13)024-(21)024 (13)029-(20)029 (13)031-(20)031 (13)037-(21)037 (13)043-(21)043 (13)057-(20)057 (01)059-(20)059 (13)065-(21)065 (13)071-(21)071 (13)073-(12)074 (13)078-(20)078 (13)080-(21)080 (13)085-(20)085 (13)087-(20)087 (05)170-(21)170 (13)171-(20)171 (22)204-(21)205 (13)248-(21)248 (13)342-(21)342 1970 96 19-20,46-47,67-69, (13)036-(20)036 none 89-90,123-124,153- (08)063-(20)063 155,192-194,285-288 (02)084-(20)084 (22)096-(21)097 (13)110-(21)110 (13)114-(06)115 (13)120-(23)120 (01)121-(12)121 (09)127-(20)127 (13)131-(20)131 (13)135-(20)135 (13)139-(21)139 (13)149-(20)149 (13)159-(21)159 (06)174-(21)174 (14)198-(00)199 (15)310-(22)310 (01)313-(20)313 1971 91 29-32,98-105,173- (13)081-(20)081 none 180,239-251,256-258, 284-285