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Full catalog/OSTIA-UKMO-L4-GLOB-REP-v2.0
OSTIA-UKMO-L4-GLOB-REP-v2.0·v2.0·dataset

How warm the sea surface is, reprocessed history (OSTIA)

GHRSST Level 4 OSTIA Global Historical Reprocessed Foundation Sea Surface Temperature Analysis produced by the UK Meteorological Office
ocean NASA POCLOUD Level 4 netCDF-4
In plain English

What it measures. A consistent, reprocessed historical record of how warm the sea surface is, plus sea-ice concentration, on a fine global grid with no gaps.

How it's made. Produced by the UK Met Office by blending readings from over 25 satellite sensors with buoy measurements using statistical interpolation, reprocessed periodically for accuracy.

How & where you'd use it. Valuable for detecting long-term ocean climate trends and variability and for studies that need a stable, gap-free sea-surface temperature history.

What's measured

OCEANS › SEA ICE › SEA ICE CONCENTRATION › Sea Ice FractionOCEANS › OCEAN TEMPERATURE › SEA SURFACE TEMPERATURE › Foundation Sea Surface Temperature

Coverage & cadence

  • Time span1982-01-01 → 2024-01-01
  • Measured byGOES-16 (ABI) · METEOSAT-9 (SEVIRI) · BUOYS (DRIFTING BUOYS) · METOP-A (AVHRR) · Sentinel-3A (SLSTR) · GCOM-W1 (AMSR2) · ENVISAT (AATSR) · GOES-13 (ABI) · METOP-B (AVHRR) · NOAA-19 (AVHRR) · GPM (GMI) · TRMM (TMI) · NOAA-18 (AVHRR) · NOAA-17 (AVHRR) · NOAA-16 (AVHRR) · NOAA-15 (AVHRR) · NOAA-14 (AVHRR) · NOAA-12 (AVHRR) · NOAA-11 (AVHRR) · NOAA-10 (AVHRR) · NOAA-9 (AVHRR) · NOAA-8 (AVHRR) · NOAA-7 (AVHRR) · NOAA-6 (AVHRR) · Sentinel-3B (SLSTR)
  • Processing levelLevel 4
  • Spatial extent-180, -90, 180, 90
  • FormatsnetCDF-4
  • StatusACTIVE

What you can do with it

  • Watch sea-surface temperature and marine heatwaves
  • Spot algal blooms and ocean-colour shifts
  • Support fisheries and coastal monitoring
Official description

The Operational Sea Surface Temperature and Sea Ice Analysis Reprocessed (OSTIA-REP) is a GHRSST reprocessed Level-4 sea surface temperature and ice-concentration analysis produced by the UK Met Office (UKMO) using optimal interpolation (OI) on a global 0.05 degree grid. It is a sister product of the Near Real Time version (OSTIA-NRT), but incorporates satellite data from over 25 different SST sensors as well as in situ data from drifting and moored buoys. The OSTIA-REP is produced on a biannual frequency when more satellite and climatology observations are available from existing geostationary IR, and polar orbiting IR and MW satellites in addition to the data used in OSTIA-NRT. While OSTIA-NRT is produced to mainly serve as a lower boundary condition in Numerical Weather Prediction (NWP) models, this OSTIA-REP aims to provide a more accurate and consistent record of SST measurements over time, which is crucial for detecting long-term climate trends and variability. Both versions follow GHRSST Data Processing Specification (GDS) version 2 format guidelines. Data to June 2022 are also distributed through the E.U. Copernicus Marine Service Information (https://marine.copernicus.eu/, DOI: https://doi.org/10.48670/moi-00168 with the following license). Please refer to the user guide for more information.

Get the data

ostia-ukmo-l4-glob-rep-v2.0_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="OSTIA-UKMO-L4-GLOB-REP-v2.0",
    version="2.0",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from POCLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.