NOAA Daily 25km Global Optimally Interpolated Sea Surface Temperature (OISST) in situ and AVHRR analysis supplemented with AVHRR Pathfinder Version 5.0 climatological SST for inland and coastal pixels, 1981-09-01 through 2010-12-31 (NODC Accession 0071180)

This accession contains the daily 25km global Optimally Interpolated Sea Surface Temperature (OISST) in situ and AVHRR analysis, supplemented with AVHRR Pathfinder Version 5.0 climatological SST for inland and coastal pixels, for 1981-09-01 through 2010-12-31. These SST data files were used during the processing of AVHRR Pathfinder Version 5.2 (PFV52) in the following ways:

1. As a first guess SST, used in the calculation of the PFV52 SST value from the brightness temperatures measured by the AVHRR instrument.

2. As a reference SST, against which the final PFV52 SST value is checked. If the difference between these two SST values is too great, the PFV52 SST is assigned a lower quality flag value.
  • Cite as: Casey, Kenneth; US DOC/NOAA/NESDIS > National Oceanographic Data Center (2011). NOAA Daily 25km Global Optimally Interpolated Sea Surface Temperature (OISST) in situ and AVHRR analysis supplemented with AVHRR Pathfinder Version 5.0 climatological SST for inland and coastal pixels, 1981-09-01 through 2010-12-31 (NODC Accession 0071180). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]
gov.noaa.nodc:0071180
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Ordering Instructions Data may be searched and downloaded using online services provided by NCEI using the online resource URLs in this record. Contact NCEI Information Services for custom orders. When requesting data from NCEI, the desired data set may be referred to by the unique package identification number listed in this metadata record.
Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact Information Services
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
301-713-3277
NCEI.Info@noaa.gov
Time Period 1981-09-01 to 2010-12-31
Spatial Bounding Box Coordinates
N: 90
S: -90
E: 180
W: -180
Spatial Coverage Map
General Documentation
Publication Dates
  • publication: 2011-08-02
Edition 1.1
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
Data Update Frequency As needed
Supplemental Information
Description of processing steps performed to generate these files:

1. The 4km AVHRR Pathfinder Version 5.0 daily harmonic climatology is binned down to 25km spatial resolution. If any single 4km pixel in the bin is water, the entire 25km pixel is classified as water.

2. A 25km land mask* is laid on top of the 25km binned climatology to identify water pixels with missing SST values.

3. A daily mean sea ice climatology, generated from the 10km EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSISAF) Global Daily Sea Ice Concentration Reprocessing Data Set (http://accession.nodc.noaa.gov/0068294), is binned to 25km spatial resolution. If any single 10km pixel in the bin is water, the entire 25km pixel is classified as water.

4. The 25km ice climatology field is filled with values of 100% sea ice cover over the permanent ice shelves in Antarctica. These permanent ice shelves are defined by the difference between the 25km OSISAF land mask and the 25km Pathfinder Version 5.2 land mask below -60 degrees latitude.

5. For pixels with no existing daily SST climatology value, AND a sea ice climatology value greater than zero, an SST value of -1.8 degrees Celsius is assigned.

6. Remaining water pixels with no SST values are assigned annual mean SST values derived from the daily harmonic climatology.

7. Any remaining water pixels are assigned latitudinal mean SST values derived from the daily harmonic climatology. The result is an effectively gap-free daily SST climatology.

8. The original NOAA Daily 25km Global Optimally Interpolated Sea Surface Temperature (OISST) analysis is read from the NODC archive. Any pixel that is missing an SST value in the OISST but has an SST value in the gap-free daily climatology is assigned the value from the daily climatology.

9. This new gap-filled OISST field is written out to netCDF to be ingested by SeaDAS during Pathfinder Version 5.2 processing.

*Provenance of 25km Pathfinder Version 5.2 land mask:
a) Land pixels were determined by rasterizing to 4km the Global Self-consistent Hierarchical High-resolution Shoreline (GSHHS) Database from the NOAA National Geophysical Data Center using a 50% area threshold. Inland water bodies (rivers and lakes) were determined by rasterizing to 4km the US World Wildlife Fund's Global Lakes and Wetlands Database using a 50 percent area threshold.
b) This 4km land mask was binned to 25km spatial resolution. If any single 4km pixel in the bin was water, the entire 25km pixel was classified as water.

Filename convention for the files in this accession:
[avhrr-only]-[v2]-[pfv52].[YYYYMMDD].[nc.gz]

avhrr-only: AVHRR-only version of the NOAA Daily OISST was used, rather than the version containing both AVHRR and AMSR data.
v2: Version 2 of the NOAA Daily OISST
pfv52: AVHRR Pathfinder Version 5.2
YYYYMMDD: Year, month and day of data
nc.gz: gzipped netCDF file

Example filename:
avhrr-only-v2-pfv52.20080701.nc.gz

About AVHRR Pathfinder Version 5.2:

The AVHRR Pathfinder Version 5.2 (PFV52) sea surface temperature product was created in partnership with the University of Miami with partial support from the NOAA Climate Data Record Program. PFV52 was computed using an entirely modernized system, based on SeaDAS and incorporating several key changes in preparation for the future Version 6 (PFV6) data set. These changes include the use of an entirely new land mask, a modified grid, and the inclusion of sea ice and wind speed auxiliary data to support the use of the SST data. Importantly, the PFV52 data are provided in netCDF-4 (classic model, with internal compression and chunking) and are nearly 100% compliant with the GHRSST Data Specification Version 2.0 for L3C products. The PFV52 data deviate from that standard only in that the sses_bias, sses_standard_deviation, and sst_dtime variables are empty and the aerosol_dynamic_indicator variable is not yet present.
Purpose Basic research
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 data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: Casey, Kenneth; US DOC/NOAA/NESDIS > National Oceanographic Data Center (2011). NOAA Daily 25km Global Optimally Interpolated Sea Surface Temperature (OISST) in situ and AVHRR analysis supplemented with AVHRR Pathfinder Version 5.0 climatological SST for inland and coastal pixels, 1981-09-01 through 2010-12-31 (NODC Accession 0071180). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]
Cited Authors
Contributors
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Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords
  • EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce
NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords
  • NOAA-11 > National Oceanic & Atmospheric Administration-11
  • NOAA-14 > National Oceanic & Atmospheric Administration-14
  • NOAA-16 > National Oceanic & Atmospheric Administration-16
  • NOAA-17 > National Oceanic & Atmospheric Administration-17
  • NOAA-18 > National Oceanic & Atmospheric Administration-18
  • NOAA-7 > National Oceanic & Atmospheric Administration-7
  • NOAA-9 > National Oceanic & Atmospheric Administration-9
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
  • AVHRR-2 > Advanced Very High Resolution Radiometer-2
  • AVHRR-3 > Advanced Very High Resolution Radiometer-3
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
  • GEOGRAPHIC REGION > GLOBAL OCEAN
Project keywords NODC PROJECT NAMES THESAURUS Global Change Master Directory (GCMD) Project Keywords
  • NOAA/NASA PATHFINDER > NOAA/NASA Pathfinder Program
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Casey, Kenneth; US DOC/NOAA/NESDIS > National Oceanographic Data Center (2011). NOAA Daily 25km Global Optimally Interpolated Sea Surface Temperature (OISST) in situ and AVHRR analysis supplemented with AVHRR Pathfinder Version 5.0 climatological SST for inland and coastal pixels, 1981-09-01 through 2010-12-31 (NODC Accession 0071180). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]
Access Constraints
  • 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.
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Lineage information for: dataset
Processing Steps
  • 2011-08-02T19:00:51 - NCEI Accession 0071180 v1.1 was published.
Output Datasets
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
  • AVHRR-2
  • AVHRR-3
Platform
  • NOAA-11
  • NOAA-14
  • NOAA-16
  • NOAA-17
  • NOAA-18
  • NOAA-7
  • NOAA-9
Last Modified: 2018-08-08T22:01:01
For questions about the information on this page, please email: NODC.DataOfficer@noaa.gov