EM122 Water Column Sonar Data Collected During AT20
Cruise>Climate Variability and Predictability (CLIVAR) A22,A20 (AT20, EM122). The
hydrographic surveys will consist of approximately 180 full water column CTD/LADCP
casts along the trackline. Each cast will acquire up to 36 water samples on the upcast,
which will be analyzed for salinity, oxygen, and nutrient concentrations. Water samples
will also be analyzed during the cruise for dissolved inorganic carbon (DIC), pH,
total alkalinity and transient tracers (CFCs and SF6). Additional water samples will
be collected and stored for shore-based analysis of dissolved organic carbon (DOC),
helium/tritium, 13C/14C, and chromophoric dissolved organic matter (CDOM). Underway
measurements will include surface pCO2, temperature, conductivity, dissolved oxygen,
fluorescence, various meteorological parameters, and bathymetry.
- Cite as: Rolling Deck to Repository (R2R). 2012. 'EM122 Water Column Sonar Data Collected During AT20'. NOAA National Centers for Environmental Information. [access date]
- AT20_EM122
- NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:AT20_EM122
gov.noaa.ngdc.mgg.wcd:AT20_EM122
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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 | 2012-03-24T20:39:09 to 2012-05-15T08:28:38 |
Spatial Reference System | urn:ogc:def:crs:EPSG::4326Vertical Datum: Unknown |
Spatial Bounding Box Coordinates |
West:179.29019555
East:189.38270645
South:13.7359958
North:86.2104866
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | The main objective is to conduct a hydrographic survey nominally along longitudes 66 W and 52W including shipboard CTD, ADCP, LADCP and Niskin bottle sampling of the water column. This is part of the U.S. CLIVAR Carbon / Repeat Hydrography program that aims to identify changes in ocean properties and circulation through time. |
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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
For questions about the information on this page, please email:ncei.info@noaa.gov