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.
- 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]
- DP02_EK80
- doi:10.7289/V5RN35TF
gov.noaa.ngdc.mgg.wcd:DP02_EK80
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Ordering Instructions | Contact the NCEI Water Column Sonar Data Manager to order data |
Distributor | Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov |
Dataset Principal Investigator | Kevin Boswell Professor Florida International University 305-919-4009 kevin.boswell@fiu.edu |
Time Period | 2015-08-09T07:11:20 to 2015-08-21T20:10:57 |
Spatial Reference System | urn:ogc:def:crs:EPSG:4326 |
Spatial Bounding Box Coordinates |
West:-89.06371
East:-86.47995
South:26.84693
North:29.04046
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | o examine the spatial and temporal dynamics of deep sea nekton in the Gulf of Mexico through a multidisciplinary approach. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Instrument keywords | Global Change Master Directory (GCMD) Instrument Keywords
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Place keywords | International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas"
publication S-23)
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Last Modified: 2017-05-30
For questions about the information on this page, please email:wcd.info@noaa.gov