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Dataset Overview | National Centers for Environmental Information (NCEI)

Shipboard and mooring oceanographic data from Line W in the North Atlantic from 2001-10-05 to 2014-05-09 (NCEI Accession 0131503)

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This dataset comprises of a series of hydrographic sections conducted 1-2 times annually between Oct 2001 and May 2014, along a line (Line-W) extending from the continental shelf south of New England towards Bermuda. Up to 29 full depth casts consisting of CTD (conductivity, temperature, pressure and oxygen), LADCP (lowered acoustic Doppler current profiler), and rosette water samples were acquired. Salinity and dissolved oxygen were analyzed from water samples during the cruise and used to calibrate the CTD sensors. Water samples were also analyzed for transient tracers (CFC-11, CFC-12, CFC-113 and SF6).

This dataset also includes oceanographic moored measurements along Line-W in the North Atlantic from the years 2001 to 2014 observed by an array of up to 6 moorings. The moorings were instrumented with some combination of McLane Moored Profilers, MCATs (CTDs), VACMs, and ADCPs. Time series of profile data includes pressure, temperature, salinity, and velocity at 2-db vertical intervals. Fixed point CTDs returned pressure, temperature, and salinity at 15-minute intervals. Vector averaging current meters (VACMs) returned velocities (eastward and northward components) and temperature at 30-min intervals. Upward looking ADCPs were mounted at 400 m on a subset of the moorings.
  • Cite as: Toole, John M.; Curry, Ruth; Joyce, Terry; McCartney, Mike; Smethie, William (2015). Shipboard and mooring oceanographic data from Line W in the North Atlantic from 2001-10-05 to 2014-05-09 (NCEI Accession 0131503). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/0131503. Accessed [date].
gov.noaa.nodc:0131503
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Distribution Formats
  • netCDF (Version: 4.3.3.1)
    • File Specification: OceanSITES-1.3, CF-1.6, ACDD-1.2
Ordering Instructions Data in this archival information package are not currently available for public download from NCEI. Please contact NCEI directly for access to these data.
Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2001-10-05 to 2014-05-09
Spatial Bounding Box Coordinates
West: -70.215
East: -64.916
South: 30.604
North: 40.298
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2015-09-11
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Pending - committed to, but not yet addressed
Data Update Frequency As needed
Purpose To clarify the ocean’s role in climate variability through changes in its transports of heat, freshwater and tracers.
Use Limitations
  • Data in this archival information package are not currently available for public download from NCEI. Please contact NCEI directly for access to these data.
  • accessLevel: Public
  • 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.
Dataset Citation
  • Cite as: Toole, John M.; Curry, Ruth; Joyce, Terry; McCartney, Mike; Smethie, William (2015). Shipboard and mooring oceanographic data from Line W in the North Atlantic from 2001-10-05 to 2014-05-09 (NCEI Accession 0131503). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/0131503. Accessed [date].
Cited Authors
Principal Investigators
Resource Providers
Points of Contact
Publishers
Acknowledgments
  • Related Funding Agency: National Science Foundation (NSF)
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords Provider Data Types
  • Eastward Velocity
  • Northward Velocity
  • Water velocity
Provider Variables
  • CHLOROFLUOROCARBON (CFC) (picomole/kilogram)
  • CONDUCTIVITY (mS/cm)
  • CURRENT METER - EAST-WEST COMPONENT (U) (cm/sec)
  • CURRENT METER - NORTH-SOUTH COMPONENT (V) (cm/sec)
  • DISSOLVED OXYGEN (umole/kg)
  • Eastward Velocity (cm/sec)
  • HYDROSTATIC PRESSURE (dbar)
  • Northward Velocity (cm/sec)
  • SALINITY (psu)
  • Sulfur Hexaflouride (SF6) (Fmole/kg)
  • WATER TEMPERATURE (degrees C)
  • Water velocity (m/s)
Data Center keywords NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords Provider Sampling Instruments
  • ACM mounted on moored profiler
  • ADCP Teledyne RDI Long Ranger
  • CTD - SBE43
  • CTD - SeaBird 911 plus
  • CTD mounted on moored profiler
  • Rosette / Niskin bottles
  • Teledyne RDI ADCP (lowered)
  • Vector Averaging Current Meter: EG&G
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Project keywords NODC PROJECT NAMES THESAURUS
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Toole, John M.; Curry, Ruth; Joyce, Terry; McCartney, Mike; Smethie, William (2015). Shipboard and mooring oceanographic data from Line W in the North Atlantic from 2001-10-05 to 2014-05-09 (NCEI Accession 0131503). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/0131503. Accessed [date].
Access Constraints
  • 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.
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.
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: HYDROSTATIC PRESSURE (measured); Units: dbar; Observation Category: in situ; Sampling Instrument: CTD mounted on moored profiler; Sampling and Analyzing Method: Profiler sampled in bursts unevenly spaced in time. Data binned in 2-dbar vertical intervals.; Data Quality Method: Data manually reviewed for quality.
  • Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: CTD mounted on moored profiler; Sampling and Analyzing Method: Profiler sampled in bursts of 5 profiles unevenly spaced in time. Data were binned in 2-dbar vertical intervals.; Data Quality Method: Data manually reviewed for quality.
  • Parameter or Variable: SALINITY (measured); Units: psu; Observation Category: in situ; Sampling Instrument: CTD mounted on moored profiler; Sampling and Analyzing Method: Profiler sampled in bursts of 5 profiles unevenly spaced in time. Data were binned in 2-dbar vertical intervals.; Data Quality Method: Data manually reviewed.
  • Parameter or Variable: Eastward Velocity (measured); Units: cm/sec; Observation Category: in situ; Sampling Instrument: ACM mounted on moored profiler; Sampling and Analyzing Method: Profiler sampled in bursts of 5 profiles unevenly spaced in time. Velocities are mean value for each 2-dbar pressure bin in a profile.; Data Quality Method: Data manually reviewed.
  • Parameter or Variable: Northward Velocity (measured); Units: cm/sec; Observation Category: in situ; Sampling Instrument: ACM mounted on moored profiler; Sampling and Analyzing Method: Profiler sampled in bursts of 5 profiles unevenly spaced in time. Velocities are mean value for each 2-dbar pressure bin in a profile.; Data Quality Method: Data manually reviewed.
  • Parameter or Variable: HYDROSTATIC PRESSURE (measured); Units: dbar; Observation Category: in situ; Sampling Instrument: moored CTD SBE-37; Sampling and Analyzing Method: Sampled at 15-minute intervals at fixed depths on a mooring.; Data Quality Method: Manually reviewed.
  • Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Sampled at 15-minute intervals at fixed depths on a mooring.; Data Quality Method: Manually reviewed.
  • Parameter or Variable: SALINITY (calculated); Units: psu; Observation Category: in situ; Sampling Instrument: CTD - moored CTD SBE-37; Sampling and Analyzing Method: Salinities are derived from a conductivity sensor to which calibrations were applied and subsequently interpolated onto common timeline. Conductivity was sampled at 15-minute intervals at fixed depths on a mooring.; Data Quality Method: Data manually reviewed.
  • Parameter or Variable: CURRENT METER - EAST-WEST COMPONENT (U) (measured); Units: cm/sec; Observation Category: in situ; Sampling Instrument: Vector Averaging Current Meter; Sampling and Analyzing Method: EG&G current meters sampled at 30-min intervals at fixed points on a mooring. Clocks were corrected for drift, and all current meters for this mooring were interpolated onto a common 30-min timeline. A pressure time series at each VACM was synthesized from pressure sensors on other instruments and their positions on mooring. Temperatures were measured by thermistors integral to the current meter; Data Quality Method: Manually reviewed.
  • Parameter or Variable: CURRENT METER - NORTH-SOUTH COMPONENT (V) (measured); Units: cm/sec; Observation Category: in situ; Sampling Instrument: Vector Averaging Current Meter: EG&G; Sampling and Analyzing Method: current meters sampled at 30-min intervals at fixed points on a mooring. Clocks were corrected for drift, and all current meters for this mooring were interpolated onto a common 30-min timeline. A pressure time series at each VACM was synthesized from pressure sensors on other instruments and their positions on mooring. Temperatures were measured by thermistors integral to the current meter.; Data Quality Method: Manually reviewed.
  • Parameter or Variable: Water velocity (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: ADCP Teledyne RDI Long Ranger; Sampling and Analyzing Method: Upward facing ADCP was mounted on a mooring line; Data Quality Method: QC was applied to each individual instrument and manually reviewed.
  • Parameter or Variable: HYDROSTATIC PRESSURE (measured); Units: dbars; Observation Category: in situ; Sampling Instrument: CTD - SeaBird 911 plus; Sampling and Analyzing Method: CTD data were acquired at 24 Hz by the instrument package which was lowered over the side on a conducting cable and winch system connected to a V2 CTD Deck Unit and computer running SeaBird software. SEASAVE CTD acquisition software (SeaBird) for Windows provided graphical data to the screen. Bottom approach was controlled by real time altimeter data and ship echosounder-derived ocean depth information. After each station, the raw CTD data were run through the SeaBird data processing software. The data were converted from HEX to ASCII, lag corrected, edited for large spikes, smoothed according to sensor, and pressure averaged into 2-dbar bins for final data quality control and analysis.; Data Quality Method: Data manually reviewed for quality.
  • Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: CTD Seabird 911 plus; Sampling and Analyzing Method: Dual temperature sensors were installed on the instrument which sampled at 24 Hz. After each station, the raw CTD data were run through SeaBird data processing software. The data were converted from HEX to ASCII, lag corrected, edited for large spikes, smoothed according to sensor, and pressure averaged into 2-decibar bins for final data quality control.; Data Quality Method: Sensors were factory calibrated pre- and post-cruise. Data were manually reviewed for quality.
  • Parameter or Variable: CONDUCTIVITY (measured); Units: mS/cm; Observation Category: in situ; Sampling Instrument: CTD Seabird 911 plus; Sampling and Analyzing Method: Dual conductivity sensors were installed on the instrument which sampled at 24 Hz. After each station, the raw CTD data were run through SeaBird data processing software. The data were converted from HEX to ASCII, lag corrected, edited for large spikes, smoothed according to sensor, and pressure averaged into 2-dbar bins for final data quality control; Data Quality Method: Conductivity profiles were compared to co-located water sample conductivities measured in the lab with a Guildline Salinometer. A slope and bias correction was generated from a least-squares minimization of the difference between CTD and water sample conductivities for groups of casts and applied to those profiles. Data were manually reviewed for quality.
  • Parameter or Variable: SALINITY (calculated); Units: psu; Observation Category: in situ; Sampling Instrument: CTD Seabird 911 plus; Sampling and Analyzing Method: Salinities were derived from conductivity profiles measured by the the CTD.; Data Quality Method: Temperature-Salinity profiles were manually reviewed and compared to climatological values.
  • Parameter or Variable: DISSOLVED OXYGEN (measured); Units: umole/kg; Observation Category: in situ; Sampling Instrument: CTD - SBE43; Sampling and Analyzing Method: Oxygen current was measured by the SBE43 sampling at 24 Hz and converted to dissolved oxygen concentrations using SeaBird software. These were compared to O2 values analyzed in co-located water samples using a modified Winkler titration method, with slope and bias corrections being applied to the CTD O2 profiles.; Data Quality Method: Water sample data and CTD Temperature-O2 profiles were manually reviewed to assign quality flags.
  • Parameter or Variable: CHLOROFLUOROCARBON (CFC) (measured); Units: picomole/kilogram; Observation Category: in situ; Sampling Instrument: Rosette / Niskin bottles; Sampling and Analyzing Method: Water samples were acquired at discrete levels in the profile and drawn asap through a PVC tube into a 500 cc glass bottle. Measurements were made using a dual purge and trap system interfaced to a dual ECD (electron capture detector) HP6890 gas chromatograph within 8 hours of collection.; Data Quality Method: Duplicate samples were collected at most stations and measured to provide a combined precision for sampling and measurement : between 0.5 and 1% for CFC-11 and CFC-12, between 1 and 2% for CFC-113.
  • Parameter or Variable: Sulfur Hexaflouride (SF6) (measured); Units: Fmole/kg; Observation Category: in situ; Sampling Instrument: Rosette / Niskin bottles; Sampling and Analyzing Method: Water samples were acquired at discrete levels in the profile and drawn asap through a PVC tube into a 500 cc glass bottle. Measurements were made using a dual purge and trap system interfaced to a dual ECD (electron capture detector) HP6890 gas chromatograph within 8 hours of collection.; Data Quality Method: Duplicate samples were collected at most stations and measured to provide a combined precision for sampling and measurement : between 1 and 5%.
  • Parameter or Variable: Water Velocity (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: Teledyne RDI ADCP (lowered); Sampling and Analyzing Method: A dual instrument system consisted of an upward facing 300 kHz ADCP and a downward facing 150 kHz ADCP was deployed on the CTD/rosette frame.; Data Quality Method: Data were all processed using LADCP Processing software version IX_10 from LDEO, Columbia University.
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - 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.
Acquisition Information (collection)
Instrument
  • ADCP
  • bottle
  • CTD
  • current meter
  • Niskin bottle
Platform
  • CAPE HATTERAS
  • ENDEAVOR
  • OCEANUS
  • R/V Atlantis
  • R/V Knorr
Last Modified: 2022-10-25T13:18:23Z
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