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: "EPIC-CDF/TIME" EXPERIMENT: "WOCE" PROJECT: "FAST" MOORING: "127" DELTA_T: "HOURLY" 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_HOURLY: 1987010100 WOCEendTIME_HOURLY: 2002013123 MINIMUM_SLH_VALUE_HOURLY: 0.17 MAXIMUM_SLH_VALUE_HOURLY: 2.42 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: 16 Dec 2005 " DOC_007: "Station : Syowa, Antarctica Latitude: 69 00.0S " DOC_008: "Country : Japan Longitude: 039 36.0E " DOC_009: "JASL # : 127A Time Meridian: 045E (GMT + 3 hr) " DOC_010: "GLOSS # : 095 Originator #: HD50 NODC #: 36039901 " DOC_011: "Contributor : Japan Oceanographic Data Center " DOC_012: " 5-3-1 Tukiji, Chuo-ku " DOC_013: " Tokyo, Japan " DOC_014: "Originator : Maritime Safety Agency " DOC_015: " Hydrographic Department " DOC_016: " Tokyo, Japan " DOC_017: " Project: Japanese Antarctic Research Expedition " DOC_018: "Original Data: digital " DOC_019: "Instrmnt Type: 1. 1987-1989 " DOC_020: " pressure-type strain gauge " DOC_021: " (SWL-7, Kyowa Shoko Co.) " DOC_022: " This segment of the data is compensated for " DOC_023: " atmospheric pressure. " DOC_024: " " DOC_025: " 2. 14 Jan 1987 - " DOC_026: " bottom-mounted (15 m) pressure-type strain gauge, " DOC_027: " Nisi-no-ura Cove, northwest of East Ongul Island, " DOC_028: " (QWP-8-303D, Meisei Denki Co.). However this " DOC_029: " series uses the SWL-7 for 1987-1989. " DOC_030: " Same type gauges were replaced at these dates: " DOC_031: " 28 Jan 1988, 22 Jan 1990, Jan 1991, and Jan 1995. " DOC_032: " " DOC_033: " The data have not been compensated for atmospheric " DOC_034: " pressure. A corrected series may be released " DOC_035: " in the future since a quartz oscillator " DOC_036: " pressure sensor was on site for 1990-. The " DOC_037: " gauge was fixed to the sea floor at 15 m depth " DOC_038: " with anchors and sand bags. The data were " DOC_039: " transmitted through an electic cable covered " DOC_040: " with a protected tube to the tide observation " DOC_041: " hut and recorded in the Earth Science Lab. " DOC_042: " Raw digital data were sampled every 2 seconds. " DOC_043: " Using readings from an independent tide pole, " DOC_044: " accuracy of calibration to the datum was " DOC_045: " estimated at +/- 1.5cm within the 95% confidence " DOC_046: " limit (Y.Michida et al, 2004). " DOC_047: "Digitzd Intvl: 30 sec " DOC_048: "Present Data : Hourly, daily, and monthly values obtained by: " DOC_049: " Hourly : The 30 seconds data is sampled from the running " DOC_050: " mean of the raw data with the band width of 30 " DOC_051: " points (60 seconds). " DOC_052: " Release the real-time data every 5 minutes " DOC_053: " through the INTERNET, which are sampled from 30 " DOC_054: " seconds data. In order to compile the monthly " DOC_055: " tidal observation table of hourly data, we use " DOC_056: " the parabolic smoothing of 3 minutes width to " DOC_057: " the 30 seconds data as follows; " DOC_058: " Y(I) = {-2(y(i-3)+y(i+3))+3(y(i-2)+ " DOC_059: " y(i+2))+6(y(i-1)+y(i+1))+7y(i)}/21 " DOC_060: " Y(I): hourly value, " DOC_061: " y(i): 30 seconds data, " DOC_062: " I=hour, " DOC_063: " i= sequence No. of data " DOC_064: " y(i-3):1min. 30sec., " DOC_065: " y(i-2):1 min., " DOC_066: " y(i-1):30 sec. before I hour. " DOC_067: " y(i+3):1min. 30sec., " DOC_068: " y(i+2):1 min., " DOC_069: " y(i+1):30 sec. after I hour. " DOC_070: " Daily : 119-point convolution filter (Bloomfield, 1976) " DOC_071: " centered on noon applied to the hourly data " DOC_072: " with respective periods of the 95, 50, and 5% " DOC_073: " amplitude points at 124.0, 60.2, and 40.2 hours " DOC_074: " Monthly: Simple average of all daily values; calculated if " DOC_075: " 7 or fewer days are missing " DOC_076: "Span of data : 31 Jan 1987 - 31 Jan 2002 " DOC_077: "Gaps > 1 mon : none " DOC_078: "Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 " DOC_079: "Units : millimeters Missing Data Flag : 9999 " DOC_080: "Existing : Yes Operational : Yes " DOC_081: "Sat. Trans. : No Distribution : 1987-2002 " DOC_082: "Refernce Levl: Data are relative to Bench Mark 1040, which is " DOC_083: " fixed on the rock near the site by the tide pole " DOC_084: " reading and leveling. Leveling information " DOC_085: " provided by the contributors led to the following " DOC_086: " adjustments to the hourly data: " DOC_087: " " DOC_088: " YYYYMMDDHH - YYYYMMDDHH added (mm) " DOC_089: " ---------------------------------------- " DOC_090: " 1993013121 - 1995013120 -1423 " DOC_091: " 1995013121 - 2001013120 -720 " DOC_092: " " DOC_093: " The following is a temporary adjustment applied " DOC_094: " by the JASL based on analysis of hourly residuals " DOC_095: " and daily means. Use this time period with " DOC_096: " discretion. This segment will likely receive " DOC_097: " a more precise correction when pertinent " DOC_098: " information is provided by the originator. " DOC_099: " " DOC_100: " YYYYMMDDHH - YYYYMMDDHH added (mm) " DOC_101: " ---------------------------------------- " DOC_102: " 2001013121 - 2002013120 -960 " DOC_103: " " DOC_104: "Comment : Referenes regarding these data: " DOC_105: " Michida, Y., 1988. Japanese activity on sea level " DOC_106: " measurement in the Antarctic region. IOC " DOC_107: " Workshop Report 54. " DOC_108: " Michida, Y., Tateoka, A., Kinoshita, H., Namaki, " DOC_109: " M. and Odamaki, M, 2004. Long-term and seasonal " DOC_110: " changes of the mean sea level at Syowa, " DOC_111: " Antarctica, from 1981-2000. Polar Meteorol. " DOC_112: " Glaciol., 18, 19-29. " DOC_113: " " DOC_114: " Note, " DOC_115: " The annual cycle has about a 35 cm range up to " DOC_116: " 1989, and mostly a 15 cm range for the rest " DOC_117: " of the series. This aspect is discussed in " DOC_118: " Michida et al, 2004. " DOC_119: " " DOC_120: " " DOC_121: " CI MISSING REPLACED GAPS QUESTIONABLE " DOC_122: "YEAR (%) DATA OR BAD DATA FLUCTUATIONS " DOC_123: "---- --- -------------------- --------------- -------------------- " DOC_124: "1987 89 118-120,170-172,208- (18)070-(10)071 none " DOC_125: " 210,337-338 " DOC_126: "1988 98 129-131,228-291 (11)188-(23)188 none " DOC_127: "1989 100 none none none " DOC_128: "1990 99 29-31 none 3-8,23-24 " DOC_129: "1991 99 31-34 none none " DOC_130: "1992 99 2-5 none none " DOC_131: "1993 100 none none none " DOC_132: "1994 100 none none none " DOC_133: "1995 100 none none none " DOC_134: "1996 100 none none none " DOC_135: "1997 100 none none none " DOC_136: "1998 100 none none none " DOC_137: "1999 98 172-174,175-177, none none " DOC_138: " 195-197 " DOC_139: "2000 100 none (22)335-(20)336 none " DOC_140: "2001 100 none none none " DOC_141: "2002 9 none none none " CREATION_DATE: "08:58 7-JUL-2006"
Variables:
time_h
: Array of 32 bit Reals [time_h = 0..132239]
time_h:
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_h_206
: Grid
time_h:
depth:
latitude:
longitude:
name: "sea_level_h" long_name: "SEA LEVEL (hourly) " generic_name: "SLh" FORTRAN_format: "f7.3" units: "m" epic_code: 206
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