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EK80 Water Column Sonar Data Collected During DP02

Metadata Updated: September 17, 2021

Deep-Pelagic Nekton Dynamics of the Gulf of Mexico (DEEPEND)- DP02 (EK80). Patterns in acoustically derived biological scatter through the water column will be collected with multi-frequency scientific echosounders (Simrad EK60) operating at 18kHz, 38kHz, 70kHz and 120kHz following protocols developed during the NOAA NRDA DAP data collection operations. Specifically, during each cruise, transducers will be installed on a rigid pole mounted to the side of the ship, and calibrated at sea for operating conditions following protocols developed by Dr. Boswell during the ONSAP/DAP cruises. The dynamics of the mesopelagic scattering community will be examined through the depth dependent scattering responses at both frequencies (18 and 38kHz) as well as through the difference between the mean volume backscattering strength (MVBS; in dB) at 18 kHz and 38 kHz (dMVBS(18-38)). In addition, scatterers in the upper water column (~150m) will be examined by analyzing the all four available frequencies. By integrating both methods, the magnitude of biological scattering at discrete-depth intervals will be classified into major taxonomic components (e.g., fluid-like crustaceans, swimbladdered fishes) based on resonant properties and behavior. The biological data and ship data collected during this cruise are available in GRIIDC datasets R4.x257.226:0001 and R4.x257.226:0011, respectively.

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.

Downloads & Resources

Dates

Metadata Date September 14, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date September 17, 2021
Reference Date(s) August 9, 2015 (creation), June 29, 2016 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NGDC MGG Sonar Water Column

Additional Metadata

Resource Type Series
Metadata Date September 14, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date September 17, 2021
Reference Date(s) August 9, 2015 (creation), June 29, 2016 (publication)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ngdc.mgg.wcd:DP02_EK80
Access Constraints Cite as: Gulf of Mexico Research Initiative (GoMRI). 2015. 'EK80 Water Column Sonar Data Collected During DP02'. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5RN35TF [access date], 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., 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., Resource may not be available for up to one year after initial collection.
Bbox East Long -86.47995
Bbox North Lat 29.04046
Bbox South Lat 26.84693
Bbox West Long -89.06371
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 3c73869c-2fd7-4644-b299-e72eb68dba5d
Harvest Source Id ab8b0290-e4db-4a00-89f2-4e427c2054b2
Harvest Source Title NGDC MGG Sonar Water Column
Licence These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty., Not subject to copyright protection within the United States.
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-89.06371, 26.84693], [-86.47995, 26.84693], [-86.47995, 29.04046], [-89.06371, 29.04046], [-89.06371, 26.84693]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Harvester True
Temporal Extent Begin 2015-08-09T07:11:20
Temporal Extent End 2015-08-21T20:10:57

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