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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]
Online Access
  • 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.
Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Dataset Point of Contact Marine Geology Data Manager
Marine Geology Data Manager
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
(303) 497-4603
geology.info@noaa.gov
General Documentation
  • Publisher's 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
  • 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
  • Ocean Drilling Program (2005): Archive of Core and Site/Hole Data and Photographs from the Ocean Drilling Program (ODP). NOAA National Centers for Environmental Information. doi:10.7289/V5W37T8C
  • NOAA/NCEI Marine Geology WAF
Date(s)
  • 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 On Going
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.
Originator(s)
  • Dr. Keir Becker
    University of Miami, RSMAS
  • Dr. Earl Davis
    Geological Survey of Canada
Point(s) of Contact
  • Dr. Keir Becker
    University of Miami, RSMAS
  • Dr. Earl Davis
    Geological Survey of Canada
Publisher(s)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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:
N: 32.3536
S: 32.2447
E: 135.0247
W: 134.9450
Spatial Coverage Map:
Theme keywords
  • Scientific archives
  • Electronic records
  • Oceanography
  • Ocean bottom
  • Geology
  • Submarine geology
  • Marine geology
  • Sea-floor characteristics
  • EARTH SCIENCE > Oceans > Ocean Pressure
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
  • In Situ Ocean-based Platforms > SHIPS
Instrument keywords
  • In Situ/Laboratory Instruments > Gauges > BOTTOM PRESSURE GAUGES
Place keywords
  • OCEAN > PACIFIC OCEAN
Project keywords
  • ODP
  • ICSU-WDS > International Council for Science - World Data System
Use Constraints
  • Use of this dataset is unrestricted.
Access Constraints
  • 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]
Fees
  • free online download
Lineage information for: dataset
Lineage Statement Data are received intermittently from the investigator.
Processing Environment
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: 2015-12-31
For questions about the information on this page, please email: geology.info@noaa.gov