EK60 Water Column Sonar Data Collected During SE1104
Kona Integrated Ecosystem Assessment Survey (SE1104, EK60). This cruise accomplished
the following objectives: Oceanographic data were collected from a total of 25 CTD
casts while continuous TSG and ADCP measurements were taken along a predefined grid
off the west coast of Hawaii to assess the influence of physical dynamics on the region's
biological productivity. CTD-mounted fluorometer measurements were carried out by
two fluorometers. Chlorophyll was measured for ten discrete samples per CTD using
a bench top Turner 10-AU fluorometer. Water samples were preserved for post-cruise
flow cytometry to determine phytoplankton size structure. Biological backscatter
was monitored using the EK60 echosounder system, both during trawl operations and
along 17 acoustic transects (including at least one daytime and one nighttime transit
of each transect). Twelve nighttime oblique mid-water trawls were conducted, with
replicate trawls at each of six sites. These trawls all targeted the shallow sound
scattering layer. Data on cetacean distribution, school size, and school composition
were collected with a towed passive acoustic array on 14 transects, including both
a daytime and nighttime transit of each transect. Daytime visual cetacean surveys
were conducted to help develop habitat envelope models for the Kona region. Fourteen
casts of a DIDSON imaging sonar were conducted to collect high resolution information
on the density of high sonic scattering layers.
- Cite as: Pacific Islands Fisheries Science Center. 2011. 'EK60 Water Column Sonar Data Collected During SE1104'. NOAA National Centers for Environmental Information. doi:10.7289/V5FJ2DR7 [access date]
- SE1104_EK60
- doi:10.7289/V5FJ2DR7
- NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:SE1104_EK60
gov.noaa.ngdc.mgg.wcd:SE1104_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 | 2011-07-02T00:00:00 to 2011-07-13T00:00:00 |
Spatial Reference System | urn:ogc:def:crs:EPSG::4326Vertical Datum: Unknown |
Spatial Bounding Box Coordinates |
West:-156.679269967658
East:-155.913810019342
South:19.2256000486427
North:20.106049945212
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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 are to collect information to describe the physical, chemical, and oceanographic environment as well as observe cetacean activity along the west coast of Hawaii as support for the monitoring component of the NOAA Kona Region IEA. The proposed survey grid will allow comparison of oceanographic features between the Kohala shelf region to the north and the deeper offshore regiono to the south as well as near shore and offshore. |
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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: 2020-06-03
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