EK60 Water Column Sonar Data Collected During OES0505
Oceanographic Survey of Cross Seamount and Control Sites (OES0505, EK60). The goal
of the cruise was to collect physical and biological oceanographic data at three distinct
environment in the lee of the Island of Hawaii: a relatively near-shore pelagic environment
off Keahole Point, Hawaii, at Finch Seamount (17° 38.070?N, longitude 157° 41.723?W)
with a 1052 m deep peak, and at Cross Seamount (18°43.285? N, longitude 158° 15.710?
W), with an approximately 400 m deep plateau. Data collected consisted of CTD casts,
trawl samples, and continuous monitoring of currents and biological acoustic backscatter.
CTD cats were conducted at predetermined stations. CTDs were equipped with oxygen
sensors and fluorometers and water was sampled at discrete depths during each cast
for chloropigments and nutrients measurements. Trawl operations were conducted at
predetermined stations using a Cobb trawl at depths of the shallow (nighttime) and
deep (day and nighttime) sound scattering layers. Currents were continuously monitored
using a RD Instruments Acoustic Doppler Current Profiler (ADCP) operating at 75 kHz
frequency. Biological backscatter were recorded using the EK60 echosounder system
(38 and 120 kHz) along predetermined transects. During the survey, a High-frequency
Acoustic Recording Package (HARP) was deployed for marine mammal observation.
- Cite as: Pacific Islands Fisheries Science Center. 2005. 'EK60 Water Column Sonar Data Collected During OES0505'. NOAA National Centers for Environmental Information. doi:10.7289/V58050K3 [access date]
- OES0505_EK60
- doi:10.7289/V58050K3
- NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:OES0505_EK60
gov.noaa.ngdc.mgg.wcd:OES0505_EK60
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Ordering Instructions | Contact the NCEI Water Column Sonar Data Manager to order data. |
Distributor | NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov |
Time Period | 2005-04-09T00:00:00 to 2005-05-01T00:00:00 |
Spatial Reference System | urn:ogc:def:crs:EPSG::4326Vertical Datum: Unknown |
Spatial Bounding Box Coordinates |
West:-158.4
East:-156
South:17.4
North:21.4
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | The scientific objectives of this cruise were to investigate the dynamic interactions of the North Equatorial Current in the lee of the Main Hawaiian Islands with the abrupt topography of Cross Seamount, and their effects on seamount associated organisms. During the cruise, surveys were conducted to study the effects of the mesoscale seamount environment on the distribution and biomass of bigeye tuna and its forage, micronekton. |
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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: 2021-09-14
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