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Mixed layer depth, isothermal layer depth, barrier layer depth, and other upper ocean thermohaline parameters, total of 17, derived from climatological gridded vertical profiles from the World Ocean Atlas 2018 (NCEI Accession 0205198)

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This dataset contains mixed layer depth, isothermal layer depth, barrier layer depth, and other upper ocean thermohaline parameters, total of 17, derived from climatological gridded vertical profiles from the World Ocean Atlas 2018. This global ocean climatological dataset also includes two identity-indices for determining isothermal layer (ITL) depth (ILD) and mixed layer depth (MLD) from gridded (0.25 degree, and 1 degree) temperature and salinity fields of the National Centers for Environmental Information (NCEI) World Ocean Atlas 2018. The exponential leap-forward gradient method is used to identify (ILD, MLD) as well as mean thermocline and pycnocline gradients at each horizontal grid point. With the given (ILD, MLD) and mean thermocline and pycnocline gradients, other parameters such as ITL heat content, mixed layer fresh-water content, ITL temperature, mixed layer density, temperature jump, density jump, maximum thermocline gradient, thermocline depth, temperature at thermocline depth, maximum density gradient, pycnocline depth, density at pycnocline depth, ILD minus MLD. The quality measure (I- index) is provided. The data of (ILD, MLD, as well as their derived parameters) are flagged out with the I-index smaller than 0.5. Data are in netcdf format, one file on a 1deg grid and one file on a quarter degree grid for each calendar month.
  • Cite as: Chu, Peter C.; Fan, Chenwu (2019). Mixed layer depth, isothermal layer depth, barrier layer depth, and other upper ocean thermohaline parameters, total of 17, derived from climatological gridded vertical profiles from the World Ocean Atlas 2018 (NCEI Accession 0205198). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/j3v2-jy50. Accessed [date].
gov.noaa.nodc:0205198
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Distribution Formats
  • Originator data format
Ordering Instructions Contact NCEI for other distribution options and instructions.
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 1955-01-01 to 2017-12-31
Spatial Bounding Box Coordinates
West: -180
East: 180
South: -90
North: 90
Spatial Coverage Map
General Documentation
Associated Resources
  • Chu, Peter C; Fan, Chenwu (2019). Global monthly climatology of deep sound channel axis, sonic layer depth, and other underwater acoustic parameters, total of 14, derived from World Ocean Atlas 2018 (NCEI Accession 0208105). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/2x35-sc93.
Publication Dates
  • publication: 2019-10-23
  • revision: 2022-11-10
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Supplemental Information
Submission Package ID: L5BY6L

In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
Purpose This dataset is available to the public for a wide variety of uses including scientific research and analysis.
Use Limitations
  • 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: Chu, Peter C.; Fan, Chenwu (2019). Mixed layer depth, isothermal layer depth, barrier layer depth, and other upper ocean thermohaline parameters, total of 17, derived from climatological gridded vertical profiles from the World Ocean Atlas 2018 (NCEI Accession 0205198). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/j3v2-jy50. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Chu, Peter C.; Fan, Chenwu (2019). Mixed layer depth, isothermal layer depth, barrier layer depth, and other upper ocean thermohaline parameters, total of 17, derived from climatological gridded vertical profiles from the World Ocean Atlas 2018 (NCEI Accession 0205198). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/j3v2-jy50. 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
  • 2019-10-23T20:58:50Z - NCEI Accession 0205198 v1.1 was published.
  • 2022-11-10T16:17:37Z - NCEI Accession 0205198 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.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: 17 thermohaline parameters (calculated); Units: various units; Observation Category: same as WOA18; Sampling Instrument: same as WOA18; Data Quality Method: Flag out the isothermal layer and mixed layer depth data with the Identity-Index values smaller than 0.5.
Acquisition Information (collection)
Instrument
  • bathythermograph - MBT
  • bathythermograph - XBT
  • buoy - moored buoy
  • CTD
  • profiling float
Last Modified: 2024-03-22T19:30:28Z
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