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    • NOAA 0.25-degree Daily Optimum Interpolation Sea Surface Temperature (OISST), Version 2.1

    Metadata Updated: September 19, 2023

    This high-resolution sea surface temperature (SST) analysis product was developed using an optimum interpolation (OI) technique. The OISST analysis has a spatial grid resolution of 0.25 degree and temporal resolution of 1 day, spanning from September 1981 to present. The analysis was constructed by combining observations from different platforms on a regular global grid, including Advanced Very High Resolution Radiometer (AVHRR) satellite data, ships, buoys and Argo floats. A spatially complete SST map was produced by interpolating to fill in spatial gaps. The methodology includes bias adjustment of satellite and ship observations (referenced to buoys) to compensate for platform differences and sensor biases. This proved critical during the Mt. Pinatubo eruption in 1991, when the widespread presence of volcanic aerosols resulted in infrared satellite temperatures that were much cooler than actual ocean temperatures, and other degradation of satellite observations. Released in March 2020, Version 2.1 supersedes the previous Version 2. For the January 2016 to present time period, changes include: 1) In-Situ ship and buoy data changed from the NCEP Traditional Alphanumeric Codes (TAC) to the NCEI merged TAC + Binary Universal Form for the Representation (BUFR) data; 2) Addition of Argo float observed SST data; 3) Satellite input changed from METOP-A and NOAA-19 to METOP-A and METOP-B; 4) Revised ship-buoy SST corrections and revised sea-ice-concentration to SST conversion. The data before January 1, 2016 remain the same as Version 2.0. Preliminary product files are produced daily in near real-time (1-day latency) and can be updated in the first few days if critical input data become available after the initial production time. After two weeks, a complete or final product is generated and archived with no additional changes expected. The product is available in netCDF-4 with metadata attributes.

    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 August 10, 2023
    Metadata Created Date October 28, 2022
    Metadata Updated Date September 19, 2023
    Reference Date(s) March 20, 2020 (publication)
    Frequency Of Update daily

    Metadata Source

    Harvested from ncdc

    Other Data Resources

    Graphic Preview

    Sea Surface Temperature image

    Additional Metadata

    Resource Type Dataset
    Metadata Date August 10, 2023
    Metadata Created Date October 28, 2022
    Metadata Updated Date September 19, 2023
    Reference Date(s) March 20, 2020 (publication)
    Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Guid gov.noaa.ncdc:C01606
    Access Constraints Cite as: Huang, Boyin; Liu, Chunying; Banzon, Viva F.; Freeman, Eric; Graham, Garrett; Hankins, William; Smith, Thomas M.; Zhang, Huai-Min. (2020): NOAA 0.25-degree Daily Optimum Interpolation Sea Surface Temperature (OISST), Version 2.1. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/RE9P-PT57. Accessed [date]., See the Use Agreement for this CDR available on the CDR page., 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., 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 180.0
    Bbox North Lat 90.0
    Bbox South Lat -90.0
    Bbox West Long -180.0
    Coupled Resource
    Frequency Of Update daily
    Graphic Preview Description Sea Surface Temperature image
    Graphic Preview File https://www.ncei.noaa.gov/pub/data/metadata/images/C01606.jpg
    Graphic Preview Type JPEG
    Harvest Object Id d8eda8ce-07a5-40e6-9815-3f17619e5111
    Harvest Source Id 2cb3ef77-1683-4c2a-9119-dc65e50917c6
    Harvest Source Title ncdc
    Licence
    Lineage This dataset was produced by and is archived at the NOAA National Centers for Environmental Information (NCEI).
    Metadata Language eng; USA
    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 onGoing
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1981-09-01

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