ncdcOisst21Agg eng UTF8 dataset service Roy Mendelssohn NOAA NMFS SWFSC Environmental Research Division +1 831-420-3666 110 McAllister Road Santa Cruz CA 95060 USA erd.data@noaa.gov pointOfContact 2026-03-14 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 4 column 1440 0.25 row 720 0.25 unknown 1 temporal 16244 86437.23450101582 area SST, Daily Optimum Interpolation (OI), AVHRR Only, Version 2.1, Final, Global, 0.25°, 1981-present 2026-03-14 creation coastwatch.pfeg.noaa.gov ncdcOisst21Agg NOAA NCEI oisst-help@noaa.gov https://doi.org/10.25921/RE9P-PT57 information web browser Background Information Background information from the source information originator This is the final version of the related dataset "ncdcOisst21NrtAgg", which has the preliminary, near real time version of these files. These final files are released about 2 weeks after the NRT files. NOAA/National Centers for Environmental Information (NCEI) 1/4 Degree Daily Optimum Interpolation Sea Surface Temperature (OISST) Analysis, Version 2.1 - Final. NOAAs 1/4-degree Daily Optimum Interpolation Sea Surface Temperature (OISST) (sometimes referred to as Reynolds SST, which however also refers to earlier products at different resolution), currently available as version v02r01, is created by interpolating and extrapolating SST observations from different sources, resulting in a smoothed complete field. The sources of data are satellite (Advanced Very High Resolution Radiometer (AVHRR)) and in situ platforms (i.e., ships and buoys), and the specific datasets employed may change over time. At the marginal ice zone, sea ice concentrations are used to generate proxy SSTs. A preliminary version of this file is produced in near-real time (1-day latency), and then replaced with a final version after 2 weeks. Note that this is the AVHRR-ONLY DOISST, available from Oct 1981, but there is a companion DOISST product that includes microwave satellite data, available from June 2002 NOAA NCEI oisst-help@noaa.gov https://doi.org/10.25921/RE9P-PT57 information web browser Background Information Background information from the source information pointOfContact advanced analysed analysis anomalies anomaly avhrr centers concentration daily data day degree deviation distribution earth environmental error estimated final high ice ice distribution information interpolation land national ncei near nesdis noaa nrt ocean oceans oisst optimum radiometer real resolution science sea sst standard statistics surface temperature version very vhrr zlev theme Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature Earth Science > Land Surface > Land Temperature > Land Surface Temperature theme GCMD Science Keywords NOAA NCEI project time sea_surface_height latitude longitude sea_surface_temperature surface_temperature_anomaly sea_ice_area_fraction theme CF Standard Name Table v70 The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. NOAA NCEI largerWorkCitation project Unidata Common Data Model Grid largerWorkCitation project eng geoscientificInformation 1 -180.0 180.0 -89.875 89.875 seconds 1981-09-01T12:00:00Z 2026-02-27T12:00:00Z SST, Daily Optimum Interpolation (OI), AVHRR Only, Version 2.1, Final, Global, 0.25°, 1981-present 2026-03-14 creation NOAA NCEI oisst-help@noaa.gov https://doi.org/10.25921/RE9P-PT57 information web browser Background Information Background information from the source information originator This is the final version of the related dataset "ncdcOisst21NrtAgg", which has the preliminary, near real time version of these files. These final files are released about 2 weeks after the NRT files. NOAA/National Centers for Environmental Information (NCEI) 1/4 Degree Daily Optimum Interpolation Sea Surface Temperature (OISST) Analysis, Version 2.1 - Final. NOAAs 1/4-degree Daily Optimum Interpolation Sea Surface Temperature (OISST) (sometimes referred to as Reynolds SST, which however also refers to earlier products at different resolution), currently available as version v02r01, is created by interpolating and extrapolating SST observations from different sources, resulting in a smoothed complete field. The sources of data are satellite (Advanced Very High Resolution Radiometer (AVHRR)) and in situ platforms (i.e., ships and buoys), and the specific datasets employed may change over time. At the marginal ice zone, sea ice concentrations are used to generate proxy SSTs. A preliminary version of this file is produced in near-real time (1-day latency), and then replaced with a final version after 2 weeks. Note that this is the AVHRR-ONLY DOISST, available from Oct 1981, but there is a companion DOISST product that includes microwave satellite data, available from June 2002 ERDDAP griddap 1 -180.0 180.0 -89.875 89.875 seconds 1981-09-01T12:00:00Z 2026-02-27T12:00:00Z tight ERDDAPgriddapDatasetQueryAndAccess https://coastwatch.pfeg.noaa.gov/erddap/griddap/ncdcOisst21Agg ERDDAP:griddap ERDDAP-griddap ERDDAP's griddap service (a flavor of OPeNDAP) for gridded data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes. download SST, Daily Optimum Interpolation (OI), AVHRR Only, Version 2.1, Final, Global, 0.25°, 1981-present 2026-03-14 creation NOAA NCEI oisst-help@noaa.gov https://doi.org/10.25921/RE9P-PT57 information web browser Background Information Background information from the source information originator This is the final version of the related dataset "ncdcOisst21NrtAgg", which has the preliminary, near real time version of these files. These final files are released about 2 weeks after the NRT files. NOAA/National Centers for Environmental Information (NCEI) 1/4 Degree Daily Optimum Interpolation Sea Surface Temperature (OISST) Analysis, Version 2.1 - Final. NOAAs 1/4-degree Daily Optimum Interpolation Sea Surface Temperature (OISST) (sometimes referred to as Reynolds SST, which however also refers to earlier products at different resolution), currently available as version v02r01, is created by interpolating and extrapolating SST observations from different sources, resulting in a smoothed complete field. The sources of data are satellite (Advanced Very High Resolution Radiometer (AVHRR)) and in situ platforms (i.e., ships and buoys), and the specific datasets employed may change over time. At the marginal ice zone, sea ice concentrations are used to generate proxy SSTs. A preliminary version of this file is produced in near-real time (1-day latency), and then replaced with a final version after 2 weeks. Note that this is the AVHRR-ONLY DOISST, available from Oct 1981, but there is a companion DOISST product that includes microwave satellite data, available from June 2002 OPeNDAP 1 -180.0 180.0 -89.875 89.875 seconds 1981-09-01T12:00:00Z 2026-02-27T12:00:00Z tight OPeNDAPDatasetQueryAndAccess https://coastwatch.pfeg.noaa.gov/erddap/griddap/ncdcOisst21Agg OPeNDAP:OPeNDAP OPeNDAP An OPeNDAP service for gridded data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes. download SST, Daily Optimum Interpolation (OI), AVHRR Only, Version 2.1, Final, Global, 0.25°, 1981-present 2026-03-14 creation NOAA NCEI oisst-help@noaa.gov https://doi.org/10.25921/RE9P-PT57 information web browser Background Information Background information from the source information originator This is the final version of the related dataset "ncdcOisst21NrtAgg", which has the preliminary, near real time version of these files. These final files are released about 2 weeks after the NRT files. NOAA/National Centers for Environmental Information (NCEI) 1/4 Degree Daily Optimum Interpolation Sea Surface Temperature (OISST) Analysis, Version 2.1 - Final. NOAAs 1/4-degree Daily Optimum Interpolation Sea Surface Temperature (OISST) (sometimes referred to as Reynolds SST, which however also refers to earlier products at different resolution), currently available as version v02r01, is created by interpolating and extrapolating SST observations from different sources, resulting in a smoothed complete field. The sources of data are satellite (Advanced Very High Resolution Radiometer (AVHRR)) and in situ platforms (i.e., ships and buoys), and the specific datasets employed may change over time. At the marginal ice zone, sea ice concentrations are used to generate proxy SSTs. A preliminary version of this file is produced in near-real time (1-day latency), and then replaced with a final version after 2 weeks. Note that this is the AVHRR-ONLY DOISST, available from Oct 1981, but there is a companion DOISST product that includes microwave satellite data, available from June 2002 Open Geospatial Consortium Web Map Service (WMS) 1 -180.0 180.0 -89.875 89.875 seconds 1981-09-01T12:00:00Z 2026-02-27T12:00:00Z tight GetCapabilities https://coastwatch.pfeg.noaa.gov/erddap/wms/ncdcOisst21Agg/request?service=WMS&version=1.3.0&request=GetCapabilities OGC:WMS OGC-WMS Open Geospatial Consortium Web Map Service (WMS) download physicalMeasurement sst float Daily sea surface temperature anom float Daily sea surface temperature anomalies err float Estimated error standard deviation of analysed_sst ice float Sea ice concentration Roy Mendelssohn NOAA NMFS SWFSC Environmental Research Division +1 831-420-3666 110 McAllister Road Santa Cruz CA 95060 USA erd.data@noaa.gov distributor OPeNDAP DAP/2.0 https://coastwatch.pfeg.noaa.gov/erddap/griddap/ncdcOisst21Agg.html order Data Subset Form ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types. download https://coastwatch.pfeg.noaa.gov/erddap/griddap/ncdcOisst21Agg.graph order Make-A-Graph Form ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data. mapDigital dataset Final file created using preliminary as first guess, and 3 days of AVHRR data. Preliminary uses only 1 day of AVHRR data. New files are downloaded daily from https://www.ncei.noaa.gov/data/sea-surface-temperature-optimum-interpolation/v2.1/access/avhrr/ to NOAA NMFS SWFSC ERD by erd.data@noaa.gov . This record was created from dataset metadata by ERDDAP Version 2.29.0