Advanced CORK (ACORK) Data from the Nankai Trough, Ocean Drilling Program (ODP) Holes 808I and 1173B
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title: Advanced CORK (ACORK) Data from the Nankai Trough, Ocean Drilling Program (ODP) Holes 808I and 1173B
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date: 2013-11-18
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individualName: Becker, Keir
organisationName: University of Miami, RSMAS
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individualName: Davis, Earl
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otherCitationDetails: Mikada, H., Becker, K., Moore, J.C., Klaus, A., et al., 2002. Proc. ODP, Init. Repts., 196: College Station, TX (Ocean Drilling Program). doi:10.2973/odp.proc.ir.196.2002
abstract: The ASCII datasets contain pressure values measured at 10-min intervals at the seafloor and several subseafloor depths in two "Advanced CORK" hydrologic observatories installed by ODP in 2001 at Sites 808I and 1173B in the Nankai Trough subduction zone. The datasets were downloaded from logger memory using Japanese research submersibles at irregular intervals of 1-2 years. Currently there are 14 total datasets as follows: downloads at 808I in 2002, 2003, 2004, 2006, 2007, 2008, 2011, and 2012; downloads at 1173B in 2002, 2004, 2006, 2007, 2011, and 2012. They should be of interest to scientists studying seismogenic processes at subduction zones. Please note that much of the data from 808I may be compromised by the lack of seal for the central bore. In addition, several of the valves on both installations were bumped open by a reentry camera frame during deployment, so the first year's installment of data from both sites was compromised until the valves were closed during the 2002 Kaiko operations. There are separate data files for each of the downloads. Each data file has a header of basic metadata that describes the contents of the columns and the respective checks on logger clock drift. Typically, the clock drift was checked just before each download, and the clocks were then reset to UTC immediately after the respective downloads. In three cases, the records of the logger times checks have been misplaced and the drifts computed from other clock checks (consistent from year to year at each site, order 1-2 minutes per year) are reported. Note that the times in the data files have not been corrected for the clock drift. Also, during some of the download operations, there were attempts to calibrate the relative offsets among gauges by opening the seafloor valves to apply seafloor pressure to all the gauges. These are not reflected in the main data files. The installations have battery power for 10-15 years of operation, longer with planned addition of supplemental batteries, so there should be future downloads to add to the archive. There are likely to be future JAMSTEC download opportunities at unpredictable intervals, hopefully every 1-2 years. At approximately 5 Mb/yr, future datasets should be approximately 5-10 Mb in size.
purpose: scientific research
credit: If you utilize the Nankai ACORK data from this site in any publications, please acknowledge support from the Ocean Drilling Program (ODP), Geological Survey of Canada, and the National Science Foundation (NSF grants OCE-0083156 and OCE-0825210), as well as JAMSTEC for submersible support for the data downloads in 2002, 2003, 2004, 2006-2008, 2011, and 2012.
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maintenanceNote: The installations have battery power for 10-15 years of operation, longer with planned addition of supplemental batteries, so there should be future downloads to add to the archive. There are likely to be future JAMSTEC download opportunities at unpredictable intervals, hopefully every 1-2 years.
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otherConstraints: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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otherConstraints: Cite as: Becker, K.; Davis, E.; et al. (2013): Advanced CORK (ACORK) Data from the Nankai Trough, Ocean Drilling Program (ODP) Holes 808I and 1173B. NOAA National Centers for Environmental Information. doi:10.7289/V5KW5CXW [access date]
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useLimitation: If you utilize the Nankai ACORK data from this site in any publications, please acknowledge support from the Ocean Drilling Program (ODP), Geological Survey of Canada, and the National Science Foundation (NSF grants OCE-0083156 and OCE-0825210), as well as JAMSTEC for submersible support for the data downloads in 2002, 2003, 2004, 2006-2008, 2011, and 2012 (Note that the ACORK in Hole 1173B was not visited for data downloads in 2003 or 2008).
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individualName: H. Mikada
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otherCitationDetails: Mikada, H., Becker, K., Moore, J.C., Klaus, A., et al., 2002. Deformation and Fluid Flow Processes in the Nankai Trough Accretionary Prism: Logging While Drilling and Advanced CORKs, Proc. ODP, Init. Repts., 196: College Station, TX (Ocean Drilling Program). doi:10.2973/odp.proc.ir.196.2002
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environmentDescription: Native Dataset Environment: ASCII files.
extent: (EX_Extent)
description: Nankai Trough
geographicElement: (EX_GeographicBoundingBox)
westBoundLongitude: 134.9450
eastBoundLongitude: 135.0247
southBoundLatitude: 32.2447
northBoundLatitude: 32.3536
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beginPosition: 2002-01-01T00:23:00.000Z
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verticalCRS: msl depth in meters
supplementalInformation: Caution: Data downloaded prior to September 6, 2013 have incorrect column headers. Details of the ACORK installations are available in the ODP Initial Reports, Vol 196 (Mikada, Becker, Moore, Klaus, et al, 2002). Please note that much of the data from 808I may be compromised by the lack of seal for the central bore. In addition, several of the valves on both installations were bumped open by a reentry camera frame during deployment, so the first year's installment of data from both sites was compromised until the valves were closed during the 2002 Kaiko operations.Typically, the clock drift was checked just before each download, and the clocks were then reset to UTC immediately after the respective downloads. In three cases, the records of the logger times checks have been misplaced and the drifts computed from other clock checks (consistent from year to year at each site, order 1-2 minutes per year) are reported. Note that the times in the data files have not been corrected for the clock drift. Also, during some of the download operations, there were attempts to calibrate the relative offsets among gauges by opening the seafloor valves to apply seafloor pressure to all the gauges. These are not reflected in the main data files.
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RecordType: There are separate data files for each of the downloads. Each data file has a header of basic metadata that describes the contents of the columns and the respective checks on logger clock drift.
contentType: (MD_CoverageContentTypeCode) point
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sequenceIdentifier:
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aName: line
attributeType: (unknown)
descriptor: sequential number for logging line
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sequenceIdentifier:
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descriptor: date of logging
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sequenceIdentifier:
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attributeType: (unknown)
descriptor: A-Cork logger pressure gauge reading (kPa)
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sequenceIdentifier:
MemberName:
aName: S
attributeType: (unknown)
descriptor: logger monitoring screens (multiple depths below sea floor)
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distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/geology/odp/cork.html
protocol: WWW:LINK-1.0-http--link
applicationProfile: Web Browser
name: Web page
description: Web page of information with links to originator's data files and documentation.
function: (CI_OnLineFunctionCode) information
distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/geology/data/joides_resolution/cork/808i/20130906_808i_acork_all_files.tar.gz
protocol: WWW:LINK-1.0-http--link
applicationProfile: Web Browser
name: 808I Data files
description: Download all data and documetation for ACORK data from hole 808I as a compressed tar file (tar.gz).
function: (CI_OnLineFunctionCode) download
distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/geology/data/joides_resolution/cork/1173b/20130906_1173b_acork_all_files.tar.gz
protocol: WWW:LINK-1.0-http--link
applicationProfile: Web Browser
name: 1173B Data files
description: Download all data and documetation for ACORK data from hole 1173B as a compressed tar file (tar.gz).
function: (CI_OnLineFunctionCode) download
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
extent: #boundingExtent
levelDescription: (MD_ScopeDescription)
dataset: gov.noaa.ngdc.mgg.geology:G13001
report: (DQ_CompletenessCommission)
evaluationMethodDescription: Report by contributing scientist.
result: (unknown)
report: (DQ_CompletenessOmission)
evaluationMethodDescription: The ACORK in Hole 1173B was not visited for data downloads in 2003 or 2008.
result: (unknown)
report: (DQ_ConceptualConsistency)
measureDescription: Please note that much of the data from 808I may be compromised by the lack of seal for the central bore. In addition, several of the valves on both installations were bumped open by a reentry camera frame during deployment, so the first year's installment of data from both sites was compromised until the valves were closed during the 2002 Kaiko operations.
result: (unknown)
report: (DQ_AbsoluteExternalPositionalAccuracy)
nameOfMeasure: Horizontal Positional Accuracy
measureDescription: (unknown)
evaluationMethodDescription: The horizontal accuracy of data values is approximately .00001 degree of latitude/longitude.
result: (unknown)
report: (DQ_NonQuantitativeAttributeAccuracy)
nameOfMeasure: Reliability
measureDescription: (unknown)
evaluationMethodDescription: Quality control is performed by originator.
result: (unknown)
lineage: (LI_Lineage)
statement: Data are received intermittently from the investigator.
processStep: (LI_ProcessStep)
description: Last data received from the investigator.
dateTime:
DateTime: 2013-09-06T00:00:00
source: (LI_Source)
description: Provider is Dr. Keir Becker, one of the investigators collecting the data.
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) repository
levelDescription: (MD_ScopeDescription)
other: NOAA National Centers for Environmental Information
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
dateTime:
DateTime: 2015-04-22T00:00:00
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Modified for compliance to NCEI Template v1.2.
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
citation: (CI_Citation)
title: In Situ/Laboratory Instruments > Gauges > BOTTOM PRESSURE GAUGES
alternateTitle: BPR
date: (unknown)
identifier: (MD_Identifier)
code: In Situ/Laboratory Instruments > Gauges > BOTTOM PRESSURE GAUGES
type: (unknown)
platform: (MI_Platform)
identifier: (MD_Identifier)
code: In Situ Ocean-based Platforms > SHIPS
description: Various ocean-based and lake-based ships, boats, remotely operated vehicles, submersibles, and other unspecified types of platforms
instrument: (inapplicable)