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Full catalog/TEMPO_O3TOT_L2
TEMPO_O3TOT_L2·vV04·dataset

Total ozone overhead, hourly over North America (TEMPO)

TEMPO ozone total column V04 (PROVISIONAL)
atmosphere NASA LARC_CLOUD Level 2 active netCDF-4
In plain English

What it measures. The total amount of ozone in a column of atmosphere overhead, mapped at about 10 km detail. It also carries extras like a UV aerosol index, an SO2 index, cloud information, and terrain height.

How it's made. Measured by NASA's TEMPO instrument, which watches North America from a fixed vantage in space; the ozone is retrieved from ultraviolet sunlight using an algorithm adapted from earlier NASA ozone missions. The data are provisional.

How & where you'd use it. Used to track ozone and related air quality across North America hour by hour during daylight, supporting pollution and UV monitoring; note its provisional status means it is still being validated.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › OXYGEN COMPOUNDS › ATMOSPHERIC OZONEATMOSPHERE › CLOUDS › CLOUD PROPERTIES › CLOUD FRACTIONATMOSPHERE › AEROSOLS › AEROSOL OPTICAL DEPTH/THICKNESS › UV AEROSOL INDEX

Coverage & cadence

  • Time span2023-08-02 → ongoing
  • Measured byIS-40e (TEMPO)
  • Processing levelLevel 2
  • FormatsnetCDF-4
  • StatusACTIVE

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

Total ozone Level 2 (PROVISIONAL) files provide ozone information at TEMPO’s native spatial resolution, ~10 km^2 at the center of the Field of Regard(FOR), for individual granules. Each granule covers the entire North-South TEMPO FOR but only a portion of the East-West FOR. The files are provided in netCDF4 format, and contain information on total column ozone and some auxiliary derived and ancillary input parameters including N-values, effective Lambertian scene-reflectivity, UV aerosol index, SO2 index, effective cloud fraction, effective cloud pressure, radiative cloud fraction, ozone below clouds, terrain height, geolocation, solar and satellite viewing angles, and quality flags. The retrieval is based on the OMI TOMS V8.5 algorithm adapted for TEMPO. These data reached provisional validation on December 9, 2024.

Get the data

tempo_o3tot_l2_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TEMPO_O3TOT_L2",
    version="V04",
    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 LARC_CLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.