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Physical and chemical profile data collected from CTD aboard the R/V Endeavor during the cruise EN492 in the North Atlantic Ocean from 26 April 2011 to 20 May 2011 (NCEI Accession 0100255)


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      DateTime:  2022-07-02T03:08:01Z
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            title:  Physical and chemical profile data collected from CTD aboard the R/V Endeavor during the cruise EN492 in the North Atlantic Ocean from 26 April 2011 to 20 May 2011 (NCEI Accession 0100255)
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                date:  2013-02-04
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                  Anchor:  NCEI Dataset ID gov.noaa.nodc:0100255
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                  Anchor:  NCEI Accession ID 0100255
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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/4374 David Ullman
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/730 University of Rhode Island; Graduate School of Oceanography (GSO)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/730 University of Rhode Island; Graduate School of Oceanography (GSO)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/730 University of Rhode Island; Graduate School of Oceanography (GSO)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/4374 Ullman, David
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/730 University of Rhode Island; Graduate School of Oceanography (GSO)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/730 University of Rhode Island > Graduate School of Oceanography
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        abstract:  The dataset consists of 115 CTD casts in the region north of Flemish Cap. Some casts cover the full water column, while others only cover the upper 1000 db. The CTD casts were obtained with a SeaBird SBE911+ system, measuring temperature (2 sensors), conductivity (2 sensors), pressure, beam transmission, height above the bottom, oxygen (2 sensors), and chlorophyll fluorescence. All sensors were sampled at 24 Hz. The data were processed using the SeaBird data processing software suite, SBEDataProcessing-Win32, and with software in MATLAB. A low pass filter, with time constant of 0.15 s, was applied to the pressure record. To account for the transit time between the temperature and conductivity sensors, the conductivity measurements were aligned with the temperature measurements using empirically determined time delays. The primary conductivity was delayed by 0.035 s relative to pressure (this is in addition to the advance of 0.073 s which is performed by the SeaBird deckbox during data acquisition, thus resulting in a net advance of 0.038 s). The secondary conductivity was advanced by 0.048 s (except for cast ctd001, which had the automatic deckbox advance value of 0.073 s applied. Thus the secondary conductivity from this cast was delayed by 0.025 s, giving a net advance of 0.048 s). The two oxygen voltages were advanced by 4 s relative to pressure. A correction for conductivity cell thermal mass effects was applied to both conductivity channels using the parameters recommended by SeaBird (alpha=0.03, 1/beta=7.0). The temperatures, conductivities, and oxygen voltages were then median filtered using a 7-scan window. A loop edit step was then applied, whereby portions of the cast in which the pressure was not changing sufficiently fast (0.2 dbar/s) were removed. This was followed by computation of salinity, potential temperature, potential density, sound velocity, geopotential anomaly, and oxygen concentration. Unfortunately, it was found that the SeaBird data processing module Derive used the primary temperature and salinity in computing both primary and secondary oxygen. Because there were several casts during which the primary temperature sensor intermittently failed, this resulted in loss of oxygen data. To get around this problem, the oxygen calculation was performed separately in MATLAB using the SeaBird algorithm and with primary/secondary oxygen computed using primary/secondary T and S respectively. Finally, the data from the downcast were averaged into 1 dbar bins. Further details of the CTD data processing can be found in the header portion of the individual cast files. The final data files contain raw sensor values (1 dbar bin averages) plus a number of derived variables (e.g., potential temperature, salinity, sigma-theta, oxygen). A full list of the output variables is contained in the header portion of the cast files. The casts were visually examined to determine the quality of the data from the 2 separate sensor suites (primary and secondary). A header line was placed in each file indicating the preferred sensor pair (PRIMARY or SECONDARY) if one was bad or whether both were of equal quality (BOTH GOOD).
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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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/accession/0100255 0100255
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                    date:  2012-12-10
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/9 ALTIMETRY - SEA SURFACE HEIGHT
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/587 BEAM ATTENUATION COEFFICIENT
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/572 Potential temperature (theta)
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/730 University of Rhode Island; Graduate School of Oceanography
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                            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
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        descriptiveKeywords:  (MD_Keywords)
            keyword:
              Anchor:  https://vocab.ices.dk/services/pox/GetCodeDetail/SHIPC/32EV ENDEAVOR (call sign: WCE5063, ICES code: 32EV, 1976)
            type:  (MD_KeywordTypeCode) platform
            thesaurusName:  (CI_Citation)
                title:  ICES/SeaDataNet Ship Codes
                date: (inapplicable)
        descriptiveKeywords:  (MD_Keywords)
            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/a4202721-0cba-4fa1-853f-890f146b04f9 OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN
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                title:  Global Change Master Directory (GCMD) Location Keywords
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                    date:  2023
                    dateType:  (CI_DateTypeCode) revision
                edition:  17
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                    organisationName:  Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)
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                            city:  Greenbelt
                            administrativeArea:  MD
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                            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
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            otherConstraints:  Cite as: Ullman, David; University of Rhode Island > Graduate School of Oceanography (2013). Physical and chemical profile data collected from CTD aboard the R/V Endeavor during the cruise EN492 in the North Atlantic Ocean from 26 April 2011 to 20 May 2011 (NCEI Accession 0100255). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0100255. Accessed [date].
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            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.
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            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.
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                  TimePeriod:
                    beginPosition:  2011-04-26
                    endPosition:  2011-05-20
        supplementalInformation: (missing)
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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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                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.
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                    linkage: ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0052/0100255/
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                    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).
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                description:  NCEI Accession 0100255 v1.1 was published.
                dateTime:
                  DateTime:  2013-02-04T22:02:20Z
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                        title:  NCEI Accession 0100255 v1.1
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                                    description:  published 2013-02-04T22:02:20Z
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            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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        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
        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:  CTD
            type:  CTD
            description:  Conductivity-Temperature-Depth probe
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                code:  fluorometer
            type:  fluorometer
            description:  fluorometer
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  radiometer
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            identifier:  (MD_Identifier)
                code:  transmissometer
            type:  transmissometer
            description:  transmissometer Instrument used to measure transmissivity in NODC File Alias F022.
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            identifier:  (MD_Identifier)
                code:  ENDEAVOR
            description:  UNIV. RHODE ISLAND RESEARCH VESSEL
            instrument: (missing)