SST, Daily Optimum Interpolation (OI), AVHRR Only, Version 2.1, Preliminary, Global, 0.25°, 2020-present

This is the preliminary, near real time version of the related dataset "ncdcOisst21Agg", which has the final version of these files, which are released about 2 weeks after these NRT files.

NOAA/National Centers for Environmental Information (NCEI) 1/4 Degree Daily Optimum Interpolation Sea Surface Temperature (OISST) Analysis, Version 2.1 - Inter. 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
_NCProperties=version=2,netcdf=4.8.1,hdf5=1.10.7
cdm_data_type=Grid
comment=Data was converted from NetCDF-3 to NetCDF-4 format with metadata updates in November 2017.
Conventions=CF-1.6, ACDD-1.3, COARDS
Easternmost_Easting=359.875
geospatial_lat_max=89.875
geospatial_lat_min=-89.875
geospatial_lat_resolution=0.25
geospatial_lat_units=degrees_north
geospatial_lon_max=359.875
geospatial_lon_min=0.125
geospatial_lon_resolution=0.25
geospatial_lon_units=degrees_east
history=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 [e-mail] .
id=ncdcOisst21NrtAgg
infoUrl=https://doi.org/10.25921/RE9P-PT57
institution=NOAA NCEI
instrument=Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > AVHRR > Advanced Very High Resolution Radiometer
instrument_vocabulary=Global Change Master Directory (GCMD) Instrument Keywords
keywords_vocabulary=GCMD Science Keywords
metadata_link=https://doi.org/10.25921/RE9P-PT57
naming_authority=gov.noaa.pfeg.coastwatch
Northernmost_Northing=89.875
platform=Ships, buoys, Argo floats, MetOp-A, MetOp-B
platform_vocabulary=Global Change Master Directory (GCMD) Platform Keywords
processing_level=NOAA Level 4
references=Reynolds, et al.(2007) Daily High-Resolution-Blended Analyses for Sea Surface Temperature (available at https://doi.org/10.1175/2007JCLI1824.1). Banzon, et al.(2016) A long-term record of blended satellite and in situ sea-surface temperature for climate monitoring, modeling and environmental studies (available at https://doi.org/10.5194/essd-8-165-2016). Huang et al. (2020) Improvements of the Daily Optimum Interpolation Sea Surface Temperature (DOISST) Version v02r01, submitted.Climatology is based on 1971-2000 OI.v2 SST. Satellite data: Pathfinder AVHRR SST, Navy AVHRR SST, and NOAA ACSPO SST. Ice data: NCEP Ice and GSFC Ice.
sensor=Thermometer, AVHRR
source=ICOADS, NCEP_GTS, GSFC_ICE, NCEP_ICE, Pathfinder_AVHRR, Navy_AVHRR, NOAA_ACSP
sourceUrl=(local files)
Southernmost_Northing=-89.875
standard_name_vocabulary=CF Standard Name Table v70
testOutOfDate=now-4days
time_coverage_end=2024-12-04T12:00:00Z
time_coverage_start=2020-05-04T12:00:00Z
Westernmost_Easting=0.125