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Physical, biological, current, and other data from CTD, XBT, ADCP, bottle casts, net casts, and other instruments from the N. E. Atlantic Ocean in support of the OMEX 1 project from 01 April 1993 to 01 December 1995 (NCEI Accession 0000172)


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            title:  Physical, biological, current, and other data from CTD, XBT, ADCP, bottle casts, net casts, and other instruments from the N. E. Atlantic Ocean in support of the OMEX 1 project from 01 April 1993 to 01 December 1995 (NCEI Accession 0000172)
            date:  (CI_Date)
                date:  2001-04-16
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                date:  2013-03-14
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                    title:  NOAA National Centers for Environmental Information
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                code:
                  Anchor:  NCEI Dataset ID gov.noaa.nodc:0000172
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                  Anchor:  NCEI Accession ID 0000172
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/254 Roy K. Lowry
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre (BODC)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre (BODC)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre (BODC)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/254 Lowry, Roy K.
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre (BODC)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre
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        abstract:  Physical, biological, current, and other data were collected from CTD, XBT, ADCP, bottle casts, net casts, and other instruments from the N. E. Atlantic Ocean in support of the OMEX 1 project from 01 April 1993 to 01 December 1995. CTD include temperature, salinity, porosity of sediments. Biological parameters include zooplankton species counts. XBT parameters include temperature profiles. ADCP parameters include current speed and direction.
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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        status:  (MD_ProgressCode) historicalArchive
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
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            fileName: https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0000172
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              Anchor:  https://www.ncei.noaa.gov/archive/accession/0000172 0000172
            thesaurusName:  (CI_Citation)
                title:  NCEI ACCESSION NUMBER
                date:  (CI_Date)
                    date:  2000-06-21
                    dateType:  (CI_DateTypeCode) publication
        descriptiveKeywords:  (MD_Keywords)
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/17 ANIMALS - INDIVIDUAL
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/32 bacteria
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/33 BACTERIA - BACTERIAL DENSITY
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/478 BENTHIC COMMUNITIES
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/51 biological data
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/55 CARBON
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/81 CHLOROPHYLL
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/96 CURRENT DIRECTION
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/97 CURRENT SPEED
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/230 NUTRIENTS
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/280 PHYTOPLANKTON
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/285 PLANKTON
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/307 SALINITY
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/373 WATER TEMPERATURE
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/440 ZOOPLANKTON
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/504 ZOOPLANKTON ABUNDANCE
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                title:  NODC DATA TYPES THESAURUS
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/1 ADCP
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/3 bottle
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/11 buoy - drifting buoy
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/8 CTD
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/67 trawl
            type:  (MD_KeywordTypeCode) instrument
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            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/35 laboratory analyses
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/41 phytoplankton abundance
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/18 profile
            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/16 tows - plankton tows
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/26 underway
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/530 British Oceanographic Data Centre
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            keyword:
              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/91 North Atlantic Ocean
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/155 Northeast Atlantic Ocean (limit-40 W)
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            keyword:  oceanography
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/1f75db71-fae3-42fb-a3a3-b1c81d951d8e UK/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
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                            name:  GCMD Keyword Forum Page
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/fbec5145-79e6-4ed0-a804-6228aa6daba5 EARTH SCIENCE > BIOLOGICAL CLASSIFICATION
            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/7437925f-7e10-4c96-af36-f3532ec24276 EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > BACTERIA/ARCHAEA
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/a69dd814-e7c0-437f-ba2a-63500f68c9a3 EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > PLANKTON
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/28dc7895-3365-4bab-9946-3b247f4137b0 EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > PLANKTON > PHYTOPLANKTON
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/ca8d77f2-9257-4298-9244-e81cd890f000 EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/0399b52c-e3de-4dcc-9eb6-b1e3acf2cf1b EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/09a78997-581b-4d1b-ae71-b2b3f96ef719 EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/5c52009f-2c44-4db1-b62b-135c6181bad2 EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/7989eae1-8ea3-4039-af0c-9130de145449 EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/8dd7c9f0-51d0-4037-b1d0-a2517c1770ad EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/510c5f78-e19e-4ce4-b59a-8937aeb84631 EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/46206e8c-8def-406f-9e62-da4e74633a58 EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/7e95b5fc-1d58-431a-af36-948b29fa870d EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/ca8de50f-b795-42b7-9301-8baffe2de0f3 ADCP > Acoustic Doppler Current Profiler
            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/01cc0beb-7c9a-40ed-ad86-0661b41aee53 CTD > Conductivity, Temperature, Depth
            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/141117c3-6d2d-4b78-b0c4-f7150f6dec2e DRIFTING BUOYS > DRIFTING BUOYS
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/c386fdd8-5a49-46c6-9be6-b56a9428f30d TRAWL
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/a4202721-0cba-4fa1-853f-890f146b04f9 OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Location Keywords
                date:  (CI_Date)
                    date:  2023
                    dateType:  (CI_DateTypeCode) revision
                edition:  17
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            city:  Greenbelt
                            administrativeArea:  MD
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
                            protocol:  HTTPS
                            name:  GCMD Keyword Forum Page
                            description:  Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 17. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        resourceConstraints:  (MD_Constraints)
            useLimitation:  accessLevel: Public
        resourceConstraints:  (MD_LegalConstraints)
            useConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Cite as: Lowry, Roy K.; British Oceanographic Data Centre (2001). Physical, biological, current, and other data from CTD, XBT, ADCP, bottle casts, net casts, and other instruments from the N. E. Atlantic Ocean in support of the OMEX 1 project from 01 April 1993 to 01 December 1995 (NCEI Accession 0000172). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0000172. Accessed [date].
        resourceConstraints:  (MD_LegalConstraints)
            useLimitation:  Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
        language:
          LanguageCode:  eng; USA
        characterSet:  (MD_CharacterSetCode) utf8
        topicCategory:  (MD_TopicCategoryCode) environment
        topicCategory:  (MD_TopicCategoryCode) oceans
        topicCategory:  (MD_TopicCategoryCode) biota
        extent:  (EX_Extent)
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                westBoundLongitude:  -13.4288
                eastBoundLongitude:  -8.5203
                southBoundLatitude:  38.2167
                northBoundLatitude:  55.0415
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  1993-04-01
                    endPosition:  1995-12-01
        supplementalInformation: (missing)
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    distributionInfo:  (MD_Distribution)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:
                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  +1-301-713-3277
                    address:  (CI_Address)
                        electronicMailAddress:  NCEI.Info@noaa.gov
                role:  (CI_RoleCode) pointOfContact
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
                orderingInstructions:  Contact NCEI for other distribution options and instructions.
            distributorFormat:  (MD_Format)
                name:  Originator data format
                version: (unknown)
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                transferSize:
                  Real:  1073.124
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/0000172
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  NCEI Dataset Landing Page
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/oas/172
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  Descriptive Information
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
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                    linkage: https://www.ncei.noaa.gov/archive/accession/download/172
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  HTTPS
                    description:  Navigate directly to the URL for data access and direct download.
                    function:  (CI_OnLineFunctionCode) download
                onLine:  (CI_OnlineResource)
                    linkage: ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0001/0000172/
                    protocol:  FTP
                    applicationProfile:  Any FTP client
                    name:  FTP
                    description:  These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
                    function:  (CI_OnLineFunctionCode) download
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  NCEI Accession 0000172 v1.1 was published.
                dateTime:
                  DateTime:  2001-04-16T04:00:00Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0000172 v1.1
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0000172/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0000172 v1.1
                                    description:  published 2001-04-16T04:00:00Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
            processStep:  (LE_ProcessStep)
                description:  NCEI Accession 0000172 was revised and v1.2 was published.
                rationale:  Additional metadata files were received or created for this dataset. These updates were copied into the about/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
                dateTime:
                  DateTime:  2013-03-14T00:45:07Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0000172 v1.2
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0000172/1.2
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0000172 v1.2
                                    description:  published 2013-03-14T00:45:07Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) repository
            levelDescription:  (MD_ScopeDescription)
                other:  NOAA National Centers for Environmental Information
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
                dateTime:
                  DateTime:  2015-04-22T00:00:00
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
        maintenanceNote:  NCEI Accession 0000172 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  ADCP
            type:  ADCP
            description:  Acoustic Doppler Current Profiler The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile. As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  bottle
            type:  bottle
            description:  any type of water bottle sampling device Generic name for water collection device; usually used to determine temperature, salinity and provide water aliquots for measurement of a wide range of parameters; often referred to by a specific type of water sampling bottle, such as a Nansen or Niskin bottle.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  buoy - drifting buoy
            type:  buoy - drifting buoy
            description:  buoy - drifting buoy
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  CTD
            type:  CTD
            description:  Conductivity-Temperature-Depth probe
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  trawl
            type:  trawl
            description:  A fishing net that is dragged behind a boat. A wide range of demersal (bottom) or pelagic (mid-water) species of fish are taken by this fishing method which entails one or a pair of vessels towing a large bag-shaped net either along the seafloor or in mid-water.