Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • 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)

    Metadata Updated: April 1, 2025

    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.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date 2025-02-21T13:09:02Z
    Metadata Created Date March 12, 2021
    Metadata Updated Date April 1, 2025
    Reference Date(s) October 23, 2019 (publication), November 10, 2022 (revision)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2025-02-21T13:09:02Z
    Metadata Created Date March 12, 2021
    Metadata Updated Date April 1, 2025
    Reference Date(s) October 23, 2019 (publication), November 10, 2022 (revision)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0205198
    Access 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]., 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.
    Bbox East Long 180
    Bbox North Lat 90
    Bbox South Lat -90
    Bbox West Long -180
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Preview graphic
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0205198
    Graphic Preview Type PNG
    Harvest Object Id f506f282-97a9-40a9-b447-a54948ca8d1d
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1955-01-01
    Temporal Extent End 2017-12-31

    Didn't find what you're looking for? Suggest a dataset here.