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Full catalog/TOMSEPL3
TOMSEPL3·v008·dataset

Total ozone and UV exposure, daily (Earth Probe TOMS)

TOMS Earth-Probe Total Ozone (O3) Aerosol Index UV-Reflectivity UV-B Erythemal Irradiances Daily L3 Global 1 deg x 1.25 deg V008 (TOMSEPL3) at GES DISC
atmosphere NASA GES_DISC Level 3
In plain English

What it measures. Daily global maps of total ozone in the air column, a measure of haze and smoke particles, how reflective the surface is, and the strength of sunburn-causing UV-B sunlight at local noon.

How it's made. Produced from the TOMS instrument on the Earth Probe satellite and gridded worldwide at about 1 degree by NASA Goddard scientists.

How & where you'd use it. Useful for tracking the ozone layer, monitoring UV exposure risk to people, and following smoke and dust events around the globe.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › OXYGEN COMPOUNDS › ATMOSPHERIC OZONE › TOTAL OZONEATMOSPHERE › ATMOSPHERIC RADIATION › REFLECTANCE › REFLECTIVITYATMOSPHERE › AEROSOLS › AEROSOL OPTICAL DEPTH/THICKNESS › UV AEROSOL INDEXATMOSPHERE › ATMOSPHERIC RADIATION › ULTRAVIOLET RADIATION › ERYTHEMAL IRRADIANCE

Coverage & cadence

  • Time span1996-07-22 → 2005-12-14
  • Measured byEP-TOMS (TOMS)
  • Processing levelLevel 3
  • Spatial extent-180, -90, 180, 90
  • StatusCOMPLETE

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

The Earth Probe (EP) Total Ozone Mapping Spectrometer (TOMS) version 8 daily global gridded data product contains total column ozone, UV aerosol index, Lambertian effective surface reflectivity (Rayleigh corrected), and UV-B erythemal local noon irradiances. The data are mapped to a global grid of size 180 x 288 with a lat-long resolution of 1.00 x 1.25 degrees. These data are stored in the EOS Hierarchical Data Format (HDF-EOS). The TOMS data were produced by the Laboratory for Atmospheres at NASA Goddard Space Flight Center (Code 614).

Get the data

tomsepl3_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TOMSEPL3",
    version="008",
    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 GES_DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.