OPeNDAP Dataset Access Form
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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: "178" 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: 1995011512 WOCEendTIME_MONTHLY: 2001061500 MINIMUM_SLH_VALUE_MONTHLY: 1.092 MAXIMUM_SLH_VALUE_MONTHLY: 1.499 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: 27 Sep 2000 " DOC_007: "Station : Crozet Latitude: 46 25.5S " DOC_008: "Country : France Longitude: 051 52.2E " DOC_009: "JASL # : 178A Time Meridian: 045E (GMT + 3 hr) " DOC_010: "GLOSS # : 021 TOGA #: none NODC #: 34056101 " DOC_011: "Contributor : Institute Mechanique de Grenoble " DOC_012: " Domaine Universitaire " DOC_013: " B.P. No. 53X " DOC_014: " 38041 Grenoble Cedex " DOC_015: " FRANCE " DOC_016: "Originator : same " DOC_017: "Original Data: digital " DOC_018: "Instrmnt Type: MORS (bottom-mounted pressure gauge). " DOC_019: " The tide gauge is installed in the Baie du Navire, " DOC_020: " Possession Island, in the Crozet archipielago, " DOC_021: " nearby the Alfred Faure french scientific base. " DOC_022: " The gauge is a MORS automatic tide gauge station " DOC_023: " and consists of a ventilated ParoScientific " DOC_024: " pressure sensor at the base of a stilling well " DOC_025: " which is used to filter waves. The ventilation " DOC_026: " of the sensor results in a measurement of the " DOC_027: " total pressure (atmosphere + ocean) minus the " DOC_028: " atmosphere; hence, a direct measure of sea level, " DOC_029: " assuming water density is properly estimated. " DOC_030: " These data have not been corrected for the " DOC_031: " inverted barometer effect. " DOC_032: "Digitzd Intvl: 15 minutes " DOC_033: "Present Data : Hourly, daily, and monthly values obtained by: " DOC_034: " Hourly : Four minute integration time is used for the " DOC_035: " bottom pressure measurement. Data are recorded " DOC_036: " on the in-board memory every 15 minutes. Data " DOC_037: " are transmitted via ARGOSS every 30 minutes to " DOC_038: " Toulouse. The data are then processed to decrypt " DOC_039: " the messages and compute sea level based on " DOC_040: " i) relative bottom pressure, ii) water temperature, " DOC_041: " and iii) barometric pressure. From this set of " DOC_042: " data in combination with salinity, which is " DOC_043: " periodically measured but is assumed to be constant " DOC_044: " over extended periods, one computes water density " DOC_045: " based on the UNESCO formula for the sea-water " DOC_046: " equation; thus, the sea level is deduced and an " DOC_047: " hourly sub-sample is extracted. " DOC_048: " Daily : 119-point convolution filter (Bloomfield, 1976) " DOC_049: " centered on noon applied to the hourly data " DOC_050: " with respective periods of the 95, 50, and 5% " DOC_051: " amplitude points at 124.0, 60.2, and 40.2 hours " DOC_052: " Monthly: Simple average of all daily values; calculated if " DOC_053: " 7 or fewer days are missing " DOC_054: "Span of data : 18 Nov 1995 - 31 May 2000 " DOC_055: "Gaps > 1 mon : 18 Feb 1997 - 10 Dec 1998;27 Jun 1999 - 12 Mar 2000 " DOC_056: "Time Refernce: GMT (00-23 hours) Space-filler Flag :-9999 " DOC_057: "Units : millimeters Missing Data Flag : 9999 " DOC_058: "Existing : Yes Operational : Yes " DOC_059: "Sat. Trans. : Yes Distribution : 1995-2000 " DOC_060: "Refernce Levl: Presently no link is established between the " DOC_061: " tide gauge and fixed bench marks. Please refer " DOC_062: " to the originator for the up-to-date status. " DOC_063: " A GPS .pilar. has been established, but presently " DOC_064: " has not been linked to the tide station. " DOC_065: "Comment : Pressure transducers typically have long-term " DOC_066: " tendencies to drift. However, the originators " DOC_067: " have calibrated the instrument before deployment " DOC_068: " and due to the shallow resting level of about " DOC_069: " 2.3 m at high tide, the potential drift would " DOC_070: " be very small. Post-retrieval calibrations " DOC_071: " have not been performed. Please refer to the " DOC_072: " originators for the up-to-date status. " DOC_073: " For this data set, no explicit correction has " DOC_074: " been applied in this regards. " DOC_075: " The plot of the hourly data minus the " DOC_076: " predicted tides reveals data with excellent " DOC_077: " timing characteristics and no obviously " DOC_078: " erroneous data. " DOC_079: " " DOC_080: " On 27 Sep 2000, data for the period 18 Nov 1995 - " DOC_081: " 28 Feb 1997 were replaced with corrections as " DOC_082: " provided by the originators. " DOC_083: " " DOC_084: " CI MISSING REPLACED GAPS QUESTIONABLE " DOC_085: "YEAR (%) DATA OR BAD DATA FLUCTUATIONS " DOC_086: "---- --- -------------------- --------------- -------------------- " DOC_087: "1995 12 none none none " DOC_088: "1996 95 (01)306-(16)306 none " DOC_089: " (01)319-(17)319 " DOC_090: "1996 77 71-74,121-127,130- (18)064-(02)065 none " DOC_091: " 132,137-140,144-148, (10)066-(06)067 " DOC_092: " 152-177,180-191,193- (14)068-(22)068 " DOC_093: " 233,315-317 (02)069-(10)069 " DOC_094: " (14)069-(06)070 " DOC_095: " (14)070-(02)071 " DOC_096: " (10)084-(02)085 " DOC_097: " (14)086-(02)087 " DOC_098: " (18)087-(02)088 " DOC_099: " (14)095-(02)096 " DOC_100: " (11)100-(18)100 " DOC_101: " (22)100-(18)101 " DOC_102: " (18)105-(06)106 " DOC_103: " (18)107-(14)108 " DOC_104: " (10)109-(06)110 " DOC_105: " (22)110-(06)111 " DOC_106: " (10)111-(18)111 " DOC_107: " (18)112-(02)113 " DOC_108: " (19)115-(06)116 " DOC_109: " (10)116-(06)117 " DOC_110: " (14)117-(06)118 " DOC_111: " (18)118-(10)119 " DOC_112: " (10)120-(22)120 " DOC_113: " (13)122-(02)123 " DOC_114: " (10)128-(18)128 " DOC_115: " (22)128-(06)129 " DOC_116: " (10)129-(18)129 " DOC_117: " (14)132-(06)133 " DOC_118: " (14)133-(22)133 " DOC_119: " (22)134-(06)135 " DOC_120: " (10)135-(06)136 " DOC_121: " (10)136-(06)137 " DOC_122: " (14)140-(06)141 " DOC_123: " (10)141-(22)141 " DOC_124: " (14)142-(22)142 " DOC_125: " (02)143-(10)143 " DOC_126: " (18)148-(06)149 " DOC_127: " (13)149-(02)150 " DOC_128: " (10)150-(22)150 " DOC_129: " (18)151-(06)152 " DOC_130: " (09)175-(06)176 " DOC_131: " (14)177-(06)178 " DOC_132: " (10)178-(22)178 " DOC_133: " (22)183-(06)184 " DOC_134: " (10)187-(06)188 " DOC_135: " (14)191-(10)192 " DOC_136: " (14)192-(04)193 " DOC_137: " (14)198-(06)199 " DOC_138: " (10)201-(02)202 " DOC_139: " (14)205-(02)206 " DOC_140: " (04)208-(14)208 " DOC_141: " (18)217-(02)218 " DOC_142: " (10)218-(18)218 " DOC_143: " (20)299-(04)300 " DOC_144: " (20)305-(16)306 " DOC_145: " (09)310-(16)310 " DOC_146: " (01)319-(17)319 " DOC_147: "1997 13 49-365 none none " DOC_148: "1998 6 1-344 none none " DOC_149: "1999 37 92-107,130-152,170- none none " DOC_150: " 172,173-177 " DOC_151: "2000 22 1-72 none none " DOC_152: " " CREATION_DATE: "12:59 12-SEP-2006"
Variables:
time
: Array of 32 bit Reals [time = 0..77]
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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