Deep ocean CTD data 2011-2013 from the Aloha Cabled Observatory (NCEI Accession 0123115)

Metadata Updated: March 10, 2021

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 rapidly sampled CTD data from a SeaBird SBE-37 Microcat during 2011-2013. The initial sampling rate was 1 minute, and it was changed to 1 second on June 27th, 2011, and to 2 seconds on December 28th, 2011. Salinities were calculated using the UNESCO routines. Currents from ADCP are available separately. The project is ongoing with data from 2014 to become available.

Access & Use Information

Public: This dataset is intended for public access and use. 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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Metadata Created Date March 10, 2021
Metadata Updated Date March 10, 2021
Data Update Frequency irregular

Metadata Source

Harvested from Commerce Non Spatial Data.json Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Created Date March 10, 2021
Metadata Updated Date March 10, 2021
Publisher DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Unique Identifier Unknown
Identifier gov.noaa.nodc:0123115
Language en-US
Data Last Modified 2014-11-14
Public Access Level public
Data Update Frequency irregular
Bureau Code 006:48
Metadata Context
Schema Version
Catalog Describedby
Old Spatial {"type": "Point", "coordinates": -158.0062, 22.73873}
Program Code 006:059
Source Datajson Identifier True
Source Hash 5de8fa191c4234da6fbc6090b2fa9ffffa037e62
Source Schema Version 1.1
Spatial {"type": "Point", "coordinates": -158.0062, 22.73873}
Temporal 2011-06-13T00:00:00/2013-12-31T00:00:00

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