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    • Deep ocean current profiles, water temperatures, and echo amplitudes from bottom-moored ADCP during 2011-2013 of the Aloha Cabled Observatory (NCEI Accession 0123608)

    Metadata Updated: March 17, 2023

    The ALOHA Cabled Observatory (ACO) is a system of hardware and software that extends electric power and the Internet offshore, supporting sustained real-time observations in the deep ocean. The ACO is connected to Oahu, Hawaii by the HAW-4 telecommunications cable transferred to the project by AT&T in 2007. On June 6th, 2011, the ACO was deployed on the ocean bottom (depth ~ 5 kilometers - 3 miles) near Station ALOHA, 100 kilometers (60 nautical miles) north of Oahu, Hawaii. Station ALOHA is the site of the long-term Hawaii Ocean Time-series (HOT) open ocean measurement program, visited by research vessels 10-12 times each year since October 1988.

    There are five modules that are connected together on the seafloor. The Junction Box is connected to the HAW-4 cable and to the Observatory module. Together, they supply 1200 watts of power and 100 Megabits per second of Ethernet communications to sensor systems on these two modules, and to the other three modules. The other modules are the Camera tripod, the AMM bottom node, and the TAAM mooring. Sensors provide live video of the ocean bottom around the ACO, sound from local and distant sources, currents, pressure, temperature, and salinity.

    This data set contains the 2011-06 to 2013-12 rapidly sampled current velocity data, which are collected at the ACO using a SonTek 250 kHz Acoustic Doppler Profiler. The instrument is located at a depth of 4726.2 m below the mean surface, 1.83 m above the bottom. There are 20 depth bins in each profile, which reaches upward to at most 100 m above the bottom. The data have been quality controlled and are stored in NetCDF format. The files contain current velocity in the east, north, and upward directions in m/s. Ancillary fields include mean echo amplitude and temperature. The project is ongoing with data from 2014- to become available.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date 2021-10-16T21:38:34Z
    Metadata Created Date December 4, 2020
    Metadata Updated Date March 17, 2023
    Reference Date(s) January 26, 2015 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2021-10-16T21:38:34Z
    Metadata Created Date December 4, 2020
    Metadata Updated Date March 17, 2023
    Reference Date(s) January 26, 2015 (publication)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0123608
    Access Constraints Cite as: McCoy, Daniel; UH Mānoa (2015). Deep ocean current profiles, water temperatures, and echo amplitudes from bottom-moored ADCP during 2011-2013 of the Aloha Cabled Observatory (NCEI Accession 0123608). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0123608. Accessed [date]., 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.
    Bbox East Long -158.0062
    Bbox North Lat 22.73873
    Bbox South Lat 22.73873
    Bbox West Long -158.0062
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Preview graphic
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0123608
    Graphic Preview Type PNG
    Harvest Object Id 491a24f7-28fe-4e6c-bc9a-d1df852c71ca
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Point", "coordinates": [-158.0062, 22.73873]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2011-06-22
    Temporal Extent End 2013-12-31

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