Advanced CORK (ACORK) Data from the Nankai Trough, Ocean Drilling Program (ODP) Holes 808I and 1173B

browse graphicACORK location map
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.
  • 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]
  • Please refer to Credit tab for full citation information.
gov.noaa.ngdc.mgg.geology:G13001
Download Data
  • 808I Data files (download)
    Download all data and documetation for ACORK data from hole 808I as a compressed tar file (tar.gz).
  • 1173B Data files (download)
    Download all data and documetation for ACORK data from hole 1173B as a compressed tar file (tar.gz).
Distribution Formats
  • ASCII (Version:UTF-8)
    • File Specification: American Standard Code for Information Interchange (ASCII) text format.
Ordering Instructions Contact NCEI for other distribution options and instructions.
Distributor NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Marine Geology Data Manager
NOAA National Centers for Environmental Information
geology.info@noaa.gov
Coverage Description Nankai Trough
Time Period 2002-01-01T00:23:00.000Z to 2012-12-31T00:23:00.000Z
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates
West:134.9450
East:135.0247
South:32.2447
North:32.3536
Spatial Coverage Map
General Documentation
  • Metadata Landing Page
    How to cite this data set (doi:10.7289/V5KW5CXW), all access options, and complete documentation.
  • Web page
    Web page of information with links to originator's data files and documentation.
Associated Resources
Publication Dates
  • publication: 2013-11-18
  • revision: 2014-11-18
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Ongoing - data is continually being updated
Historical archive - data has been stored in an offline storage facility
Data Update Frequency Irregular - 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.
Supplemental Information
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.
Purpose scientific research
Use Limitations
  • 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).
  • Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
Dataset Citation
  • 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]
  • Cite as: {{Author(s)}}. {{Publication year}}: {{Title}}. {{Version}}. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/{{DOI}}. Accessed [date].
Cited Authors
  • Becker, Keir
    University of Miami, RSMAS
  • Davis, Earl
    Geological Survey of Canada
Publishers
  • NOAA National Centers for Environmental Information
Acknowledgments
  • 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.
Theme keywords Library of Congress Subject Headings
  • Scientific archives
  • Electronic records
  • Oceanography
  • Ocean bottom
  • Geology
  • Submarine geology
SeaDataNet Common Vocabularies
  • Marine geology
USGS Science Topics
  • Sea-floor characteristics
Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Oceans > Ocean Pressure
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • In Situ Ocean-based Platforms > Ships
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • In Situ/Laboratory Instruments > Gauges > BOTTOM PRESSURE GAUGES
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Ocean > Pacific Ocean
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • ODP
  • ICSU-WDS > International Council for Science - World Data System
Use Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Access Constraints
  • 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.
  • Access to this dataset is unrestricted.
Other Constraints 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]
Other Constraints Cite as: {{Author(s)}}. {{Publication year}}: {{Title}}. {{Version}}. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/{{DOI}}. Accessed [date].
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for:dataset
Lineage Statement Data are received intermittently from the investigator.
Processing Environment Native Dataset Environment: ASCII files.
Source Datasets
Lineage information for:repository
Processing Steps
  • 2015-04-22T00:00:00 -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.
Acquisition Information (collection)
Instrument
  • In Situ/Laboratory Instruments > Gauges > BOTTOM PRESSURE GAUGES
Platform
  • In Situ Ocean-based Platforms > SHIPS
Last Modified: 2020-04-21
For questions about the information on this page, please email:ncei.info@noaa.gov