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Full catalog/GAMSSA_28km-ABOM-L4-GLOB-v01
GAMSSA_28km-ABOM-L4-GLOB-v01·v1.0·dataset

How warm the sea surface is, daily global map (28 km)

GHRSST Level 4 GAMSSA_28km Global Foundation Sea Surface Temperature Analysis v1.0 dataset (GDS2)
ocean NASA POCLOUD Level 4 netCDF-4
In plain English

What it measures. A daily worldwide map of how warm the sea surface is, on a grid of about 28 km squares. It aims for a steady 'foundation' temperature that strips out the daily warming from sun and cooling at night.

How it's made. Made by the Australian Bureau of Meteorology, which blends temperature readings from several satellites with measurements from ships, buoys, and moorings, then fills gaps using statistical interpolation.

How & where you'd use it. Useful for tracking ocean conditions, feeding weather and climate models, and monitoring marine heat patterns over time.

What's measured

OCEANS › OCEAN TEMPERATURE › SEA SURFACE TEMPERATURE › SEA SURFACE FOUNDATION TEMPERATURE

Coverage & cadence

  • Time span2008-07-23 → ongoing
  • Measured byBUOYS (DRIFTING BUOYS) · Suomi-NPP (VIIRS) · GCOM-W1 (AMSR2) · METOP-A (AVHRR-3) · NOAA-20 (VIIRS) · METOP-B (AVHRR-3)
  • 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

A Group for High Resolution Sea Surface Temperature (GHRSST) Level 4 sea surface temperature analysis, produced daily on an operational basis at the Australian Bureau of Meteorology (BoM) using optimal interpolation (OI) on a global 0.25 degree grid. This Global Australian Multi-Sensor SST Analysis (GAMSSA) v1.0 system blends satellite SST observations from passive infrared and passive microwave radiometers with in situ data from ships, drifting buoys and moorings from the Global Telecommunications System (GTS). SST observations that have experienced recent surface wind speeds less than 6 m/s during the day or less than 2 m/s during night are rejected from the analysis. The processing results in daily foundation SST estimates that are largely free of nocturnal cooling and diurnal warming effects. Sea ice concentrations are supplied by the NOAA/NCEP 12.7 km sea ice analysis. In the absence of observations, the analysis relaxes to the Reynolds and Smith (1994) Monthly 1 degree SST climatology for 1961 - 1990.

Get the data

gamssa_28km-abom-l4-glob-v01_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="GAMSSA_28km-ABOM-L4-GLOB-v01",
    version="1.0",
    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.