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Synoptic measurements of subsurface phytoplankton layers collected from Fish Lidar, Oceanic, Experimental (FLOE) Light Detection and Ranging (LIDAR) from aircraft in Chukchi Sea and Beaufort Sea from 2014-07-17 to 2014-07-29 (NCEI Accession 0128217)


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            title:  Synoptic measurements of subsurface phytoplankton layers collected from Fish Lidar, Oceanic, Experimental (FLOE) Light Detection and Ranging (LIDAR) from aircraft in Chukchi Sea and Beaufort Sea from 2014-07-17 to 2014-07-29 (NCEI Accession 0128217)
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                date:  2015-06-02
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/4756 James H Churnside
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        abstract:  In July 2014, Fish Lidar, Oceanic, Experimental (FLOE) Light Detection and Ranging (LIDAR) was installed in a NOAA Twin Otter to make the first synoptic measurements of subsurface phytoplankton layers associated with the retreating ice in the Arctic Ocean. We made a series of flights out of Barrow, Alaska over the Chukchi Sea to the west or the Beaufort Sea to the East. Our objectives were to see if thin plankton layers exist below the surface in the Arctic and how they might be affected by retreating ice. We have observed layers associated with stratification in other parts of the ocean [Churnside and Donaghay, 2009], and expected to find them in the Marginal Ice Zone as well. The LIDAR was able to measure the layer characteristics and the fractional ice cover simultaneously. These layers, which are not adequately captured in satellite data, will influence primary productivity, secondary productivity, fisheries recruitment, and carbon export to the benthos.
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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            otherConstraints:  Cite as: Churnside, James; Marchbanks, Richard (2015). Synoptic measurements of subsurface phytoplankton layers collected from Fish Lidar, Oceanic, Experimental (FLOE) Light Detection and Ranging (LIDAR) from aircraft in Chukchi Sea and Beaufort Sea from 2014-07-17 to 2014-07-29 (NCEI Accession 0128217). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0128217. Accessed [date].
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                    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/arc0076/0128217/
                    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 0128217 v1.1 was published.
                dateTime:
                  DateTime:  2015-06-02T14:03:13Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0128217 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/0128217/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0128217 v1.1
                                    description:  published 2015-06-02T14:03:13Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
            processStep:  (LE_ProcessStep)
                description:  NCEI Accession 0128217 was revised and v2.2 was published.
                rationale:  Updates were received for this dataset. These updates were copied into the data/0-data/ 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:  2015-06-03T12:59:59Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0128217 v2.2
                        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/0128217/2.2
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0128217 v2.2
                                    description:  published 2015-06-03T12:59:59Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  Data Type: Lidar signal (measured); Units: amp; Observation Type: other; Sampling Instrument: Oceanographic lidar; Sampling and Analyzing Method: Lidar data were collected at a flight altitude of 300 m and a speed of 60 m/sec . Lidar pulse repetition rate was 30 Hz. The system and operation is described further in the references. For the first 4 days (17-23 July) both receiver channels were set to record the cross polarized return. After that, one channel recorded the cross polarized return and the other the co polarized return. Analysis was by visual inspection of the raw data. Ice was initially identified by the presence of a saturated lidar return, and marked with a flag in the raw data files. This was verified by visual inspection. Plankton layers were identified by visual inspection, and also marked with a flag in the raw data files. At the same time, a separate file was created to include the shot number and depth at which each identified layer started and ended.; Data Quality Information: In post processing, each lidar shot was checked for receiver saturation, which indicates ice. Data were visually inspected for fog, land, and other bad data shots. Flags were set to 1 (binary, not ASCII) in the presence of ice (byte 2150), fog (byte 2151), land (byte 2152), missing data (byte 2155), and bad data, including when the aircraft was outside the altitude range (byte 2153). Lidar profiles were not used if any of these flags were set to 1.
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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 0128217 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:  LIDAR
            type:  LIDAR
            description:  Light Detection and Ranging Remote sensing instrument with laser and receiver that uses time, strength and polarization of return to determine characteristics of target.
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  AIRCRAFT
            description:  AIRCRAFT
            instrument: (missing)