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Full catalog/MW_OI-REMSS-L4-GLOB-v5.1
MW_OI-REMSS-L4-GLOB-v5.1·v5.1·dataset

How warm the sea surface is, gap-filled microwave map

GHRSST Level 4 MW_OI Global Foundation Sea Surface Temperature analysis version 5.1 from REMSS
ocean NASA POCLOUD Level 4 netCDF-4
In plain English

What it measures. A daily, gap-free map of sea surface temperature across the global ocean at quarter-degree detail.

How it's made. Produced by blending data from several microwave satellite sensors using a method called optimal interpolation; because microwaves see through clouds, the result has no cloud gaps. No buoy data is used.

How & where you'd use it. Provides a complete daily picture of ocean temperature for weather, climate, and marine studies, valuable precisely because it fills in cloudy areas other sensors miss.

What's measured

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

Coverage & cadence

  • Time span1997-12-31 → ongoing
  • Measured byGCOM-W1 (AMSR2) · GPM (GMI) · Aqua (AMSR-E) · TRMM (TMI) · CORIOLIS (WINDSAT)
  • 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) global Level 4 sea surface temperature analysis produced daily on a 0.25-degree grid at Remote Sensing Systems. This product uses optimal interpolation (OI) from microwave (MW) sensors including the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI), the NASA Advanced Microwave Scanning Radiometer-EOS (AMSR-E), the WindSat on the Coriolis satellite, the Global Precipitation Measurement (GPM) Microwave Imager (GMI), and the Advanced Microwave Scanning Radiometer 2 (AMSR2) onboard the GCOM-W1 satellite. These MW sensors are used through the SST production based on the sensor data availability. The through-cloud capabilities of microwave radiometers provide a valuable picture of global sea surface temperature (SST). This analysis does not use any in situ SST data such as drifting buoy SST. Compared with the previous version 5.0 dataset, version 5.1 is processed using updated input files, the sensor-specific error statistics (SSES) for each microwave sensor are updated, and deficiencies in the OI processing have been addressed.

Get the data

mw_oi-remss-l4-glob-v5.1_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="MW_OI-REMSS-L4-GLOB-v5.1",
    version="5.1",
    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.