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Global Attributes:	INST_TYPE: "FLOAT GAUGE" DATA_TYPE: "TIME" DATA_SUBTYPE: "H" DATA_ORIGIN: "UHSLC" COORD_SYSTEM: "GEOGRAPHICAL" Conventions: "PMEL-EPIC/TIME" EXPERIMENT: "WOCE" PROJECT: "FAST" MOORING: "291" DELTA_T: "MONTHLY" VAR_DESC: "SEA LEVEL" DESCRIPT: "AVERAGE DATA" VAR_FILL: "1.e35" DRIFTER: 0 WATER_DEPTH: 0 FILL_FLAG: 1 PROG_CMNT1: "conversion from ascii" COMPOSITE: 0 POS_CONST: 0 DEPTH_CONST: 0 WOCETIME: "YYYYMMDDhh" WOCEstartTIME_MONTHLY: 1993011512 WOCEendTIME_MONTHLY: 2001031512 MINIMUM_SLH_VALUE_MONTHLY: -0.136 MAXIMUM_SLH_VALUE_MONTHLY: 0.029 DOC_001: " " DOC_002: " QUALITY ASSESSMENT OF SEA LEVEL DATA " DOC_003: " by the " DOC_004: " UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER " DOC_005: " JOINT ARCHIVE FOR SEA LEVEL " DOC_006: " updated: 22 Aug 2002 " DOC_007: "Station : Ascension Latitude: 07 55.0S " DOC_008: "Country : United Kingdom Longitude: 014 25.0W " DOC_009: "JASL # : 291A Time Meridian: 000E (GMT ) " DOC_010: "GLOSS # : 263 TOGA #: A036 NODC #: 50017401 " DOC_011: "Contributor : Proudman Oceanographic Laboratory " DOC_012: " Bidston Observatory, Birkenhead " DOC_013: " Merseyside L43 7RA " DOC_014: "Originator : same " DOC_015: "Original Data: digital " DOC_016: "Instrmnt Type: Digiquartz pressure sensor and barometer " DOC_017: "Digitzd Intvl: 15 minutes " DOC_018: "Present Data : Hourly, daily, and monthly values obtained by: " DOC_019: " Hourly : average of 15-min values taken at (hour - 7.5 min) " DOC_020: " and (hour + 7.5 min) (done at the UHSLC) " DOC_021: " Daily : 119-point convolution filter (Bloomfield, 1976) " DOC_022: " centered on noon applied to the hourly data " DOC_023: " with respective periods of the 95, 50, and 5% " DOC_024: " amplitude points at 124.0, 60.2, and 40.2 hours " DOC_025: " Monthly: Simple average of all daily values; calculated if " DOC_026: " 7 or fewer days are missing " DOC_027: "Span of data : 23 May 1993 - 03 Apr 2001 " DOC_028: "Gaps > 1 mon : 26 Jun 1998 - 03 Apr 1999 " DOC_029: "Time Refernce: GMT (00-23 hours) Space-filler Flag :-9999 " DOC_030: "Units : millimeters Missing Data Flag : 9999 " DOC_031: "Existing : Yes Operational : Yes " DOC_032: "Sat. Trans. : Yes Distribution : 1993-2001 " DOC_033: "Refernce Levl: Precise datum control using technique described " DOC_034: " by Woodworth et al., 1994. This series is " DOC_035: " relative to the Ascension B-Datum May 1993. " DOC_036: " The reference level was adjusted by adding " DOC_037: " +8 mm to the original data from 8Z 03 Apr 1999 - " DOC_038: " the end of the record, based on information " DOC_039: " provided by the contributors. " DOC_040: "Comment : This gauge is in English Bay, Ascension and is " DOC_041: " not to be confused with Phase 1 pressure sensor " DOC_042: " which was in Clarence Bay. " DOC_043: " " DOC_044: " This station is part of Phase 2 of the ACCLAIM " DOC_045: " project. The ACCLAIM (Antarctic Circumpolar " DOC_046: " Current Levels by Altimetry and Island " DOC_047: " Measurements) programme in the South Atlantic and " DOC_048: " Southern Oceans consists of measurements from " DOC_049: " coastal tide gauges and bottom pressure stations, " DOC_050: " together with an ongoing research programme in " DOC_051: " satellite altimetry. ACCLAIM is the Proudman " DOC_052: " Oceanographic Laboratory's main contribution to " DOC_053: " WOCE (and, in particular, to WOCE Core 2) and one " DOC_054: " of its objectives is the study of variations of " DOC_055: " the Antarctic Circumpolar Current. ACCLAIM is " DOC_056: " managed within the Global Sea Level Change (GSLC) " DOC_057: " group at POL led by Dr.J.M.Vassie. " DOC_058: " " DOC_059: " The history of the development of ACCLAIM is " DOC_060: " described in the report by Spencer et al. (1993): " DOC_061: " " DOC_062: " Spencer, R., Foden, P.R., McGarry, C., Harrison, " DOC_063: " A.J., Vassie, J.M., Baker, T.F., Smithson, " DOC_064: " M.J., Harangozo, S.A. and Woodworth, P.L. 1993. " DOC_065: " The ACCLAIM programme in the South Atlantic and " DOC_066: " Southern Oceans. International Hydrographic " DOC_067: " Review, 70, 7-21. " DOC_068: " " DOC_069: " In that report it will be seen that, in Phase 1 of " DOC_070: " ACCLAIM from 1983, measurements at coastal tide " DOC_071: " gauge sites took the form of sub-surface pressure " DOC_072: " (SSP) measurements (units of pressure e.g. mbar) " DOC_073: " rather than sea level (units of length e.g. " DOC_074: " centimetres). SSP is here defined as the total, " DOC_075: " measured pressure recorded by a sub-surface " DOC_076: " pressure transducer, a measurement which includes " DOC_077: " the pressure load from the atmosphere as well as " DOC_078: " from the water column. It is absolutely essential " DOC_079: " that any user of ACCLAIM data realises which data " DOC_080: " type (either SSP or sea level) is being analysed. " DOC_081: " " DOC_082: " From around early 1993, the gauges at many of the " DOC_083: " sites were replaced by Phase 2 ACCLAIM 'B gauges' " DOC_084: " which record SSP, air pressure and sea level as " DOC_085: " described in: " DOC_086: " " DOC_087: " Woodworth, P.L., Vassie, J.M., Spencer, R. and " DOC_088: " Smith, D.E. 1994. Precise datum control for " DOC_089: " pressure tide gauges. To be published in Marine " DOC_090: " Geodesy. " DOC_091: " " DOC_092: " The Phase 1 coastal SSP data were acquired in " DOC_093: " different ways (e.g. with a diver-replaced " DOC_094: " Aanderaa pressure gauge at Ascension, or with a " DOC_095: " Digiquartz in the sea sensor at St.Helena, " DOC_096: " see Spencer et al. 1993 for details) and with " DOC_097: " different pressure integration periods (e.g. " DOC_098: " quarter hour, half hour, one hour). For WOCE Centre " DOC_099: " purposes the original data have generally been " DOC_100: " filtered to give one hour sampling. However, " DOC_101: " common to all records is an uncertainty connected " DOC_102: " with potential offset biases and drifts in the " DOC_103: " pressure sensors. At some sites (e.g. St.Helena) " DOC_104: " extensive tide pole data are also available and " DOC_105: " biases and long term drifts in the sensor data " DOC_106: " may eventually be rectified (this is under study " DOC_107: " at present). However, the drifts in general mean " DOC_108: " that in most cases the records should not be used, " DOC_109: " without further careful attention in particular " DOC_110: " studies, for the study of timescales seasonal or " DOC_111: " longer. " DOC_112: " " DOC_113: " The Phase 2 coastal sea level data have precise " DOC_114: " datum control (see Woodworth et al. 1994 for " DOC_115: " details) and can certainly be used for long " DOC_116: " term studies. These data have also been contributed " DOC_117: " to the Permanent Service for Mean Sea Level (PSMSL) " DOC_118: " and Global Sea Level Observing System (GLOSS). " DOC_119: " " DOC_120: " Some of the Phase 1 data and all the Phase 2 " DOC_121: " coastal data will also contain ancillary " DOC_122: " information on air pressures and sea temperatures " DOC_123: " from ACCLAIM sensors. Several of these records " DOC_124: " contain large gaps. However, the GSLC group at POL " DOC_125: " has collected extensive sets of such ancillary " DOC_126: " data from meteorological agencies for its own " DOC_127: " analysis purposes, and should be able to provide " DOC_128: " further advice. " DOC_129: " " DOC_130: " SSP measurements at deep ocean bottom pressure " DOC_131: " stations (together with inverted echo sounder and " DOC_132: " temperature measurements) have also been a " DOC_133: " feature of ACCLAIM. Measurements at Amsterdam and " DOC_134: " Kerguelen in the Indian Ocean are described in: " DOC_135: " " DOC_136: " Vassie, J.M., Harrison, A.J., Woodworth, " DOC_137: " P.L., Harangozo, S.A., Smithson, M.J. and " DOC_138: " Thompson, S.R. 1994. On the temporal " DOC_139: " variability of the transport between Amsterdam " DOC_140: " and Kerguelen Islands. Journal of Geophysical " DOC_141: " Research, 99(C1), 937-949. " DOC_142: " " DOC_143: " while most recording is now concentrated in the " DOC_144: " Scotia Sea - Drake Passage area of the Southern " DOC_145: " Ocean as part of WOCE Core 2. Tidal constituents " DOC_146: " from these recorders have been contributed to " DOC_147: " the IAPSO Pelagic Constants data base maintained " DOC_148: " by the PSMSL at Bidston on behalf of IAPSO. " DOC_149: " " DOC_150: " CI MISSING REPLACED GAPS QUESTIONABLE " DOC_151: "YEAR (%) DATA OR BAD DATA FLUCTUATIONS " DOC_152: "---- --- -------------------- --------------- -------------------- " DOC_153: "1993 59 327-334 none none " DOC_154: "1994 100 none none none " DOC_155: "1995 100 none (01)032-(20)032 none " DOC_156: "1996 92 26-41,47-60,138-139 none none " DOC_157: "1997 98 82-90 none none " DOC_158: "1998 49 177-365 none none " DOC_159: "1999 75 1-93 none none " DOC_160: "2000 100 none (16)165-(15)166 none " DOC_161: "2001 25 none none none " CREATION_DATE: "12:59 12-SEP-2006"

Variables:	time: Array of 32 bit Reals [time = 0..98] time: FORTRAN_format: " " units: "day since 1985-1-1 0:0:0" type: "EVEN"
	depth: Array of 32 bit Reals [depth = 0..0] depth: FORTRAN_format: " " units: "m" type: "EVEN" epic_code: 3
	latitude: Array of 32 bit Reals [latitude = 0..0] latitude: FORTRAN_format: " " units: "degree_north" type: "EVEN" epic_code: 500
	longitude: Array of 32 bit Reals [longitude = 0..0] longitude: FORTRAN_format: " " units: "degree_east" type: "EVEN" epic_code: 502
	sea_level_m_208: Grid time: depth: latitude: longitude: name: "sea_level_m" long_name: "SEA LEVEL (monthly) " generic_name: "SLm" FORTRAN_format: "f7.3" units: "m" epic_code: 208

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DDS:

Dataset {
    Float32 time[time = 99];
    Float32 depth[depth = 1];
    Float32 latitude[latitude = 1];
    Float32 longitude[longitude = 1];
    Grid {
     ARRAY:
        Float32 sea_level_m_208[time = 99][depth = 1][latitude = 1][longitude = 1];
     MAPS:
        Float32 time[time = 99];
        Float32 depth[depth = 1];
        Float32 latitude[latitude = 1];
        Float32 longitude[longitude = 1];
    } sea_level_m_208;
} uh-slc/m291.nc;

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