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.

Data and Resources

Additional Info

Field Value
Last Updated June 10, 2017, 18:11
Created June 10, 2017, 18:11
access_constraints ["Cite as: Kevin Boswell, Florida International University (2015): Water Column Sonar Data Collection (DP02, EK80). National Centers for Environmental Information, NOAA. doi:10.7289/V5RN35TF [access date]", "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
contact-email kevin.boswell@fiu.edu
coupled-resource []
dataset-reference-date [{"type": "creation", "value": "2015-08-09"}]
frequency-of-update notPlanned
guid gov.noaa.ngdc.mgg.wcd:DP02_EK80
licence ["While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, 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.", "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-date 2017-05-30
metadata-language
progress completed
resource-type series
responsible-party [{"name": "Florida International University", "roles": ["principalInvestigator"]}]
spatial {"type": "Polygon", "coordinates": [[[-89.06371, 26.84693], [-86.47995, 26.84693], [-86.47995, 29.04046], [-89.06371, 29.04046], [-89.06371, 26.84693]]]}
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