Earth Data School
About
Full catalog/TRPSCRO32H2D
TRPSCRO32H2D·v1·dataset

Ground-level ozone pollution, every 2 hours (reanalysis)

TROPESS Chemical Reanalysis Surface O3 2-Hourly 2-dimensional Product V1 (TRPSCRO32H2D) at GES DISC
atmosphere NASA GES_DISC Level 4
In plain English

What it measures. Ground-level ozone concentrations across the globe, reported every two hours from 2005 through 2021. Ozone near the surface is the kind that affects the air we breathe rather than the protective layer high above.

How it's made. It isn't a direct satellite reading but a reanalysis: a computer model blends measurements from several satellite sensors to estimate consistent surface ozone on a roughly 1.1-degree grid.

How & where you'd use it. Useful for studying air pollution patterns and trends over time, comparing regions, and providing a long-term, gap-free record for health and climate research.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › OXYGEN COMPOUNDS › ATMOSPHERIC OZONE

Coverage & cadence

  • Time span2005-01-01 → 2021-12-31
  • Measured byREANALYSIS MODELS (NOT APPLICABLE)
  • Processing levelLevel 4
  • 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 TROPESS Chemical Reanalysis Surface O3 2-Hourly 2-dimensional Product contains surface concentrations of ozone. The data are part of the Tropospheric Chemical Reanalysis v2 (TCR-2) for the period 2005-2021. TCR-2 uses JPL's Multi-mOdel Multi-cOnstituent Chemical (MOMO-Chem) data assimilation framework that simultaneously optimizes both concentrations and emissions of multiple species from multiple satellite sensors. The data files are written in the netCDF version 4 file format, and each file contains a year of data at 2-hourly resolution, and a spatial resolution of 1.125 x 1.125 degrees. The principal investigator for the TCR-2 data is Miyazaki, Kazuyuki.

Get the data

trpscro32h2d_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TRPSCRO32H2D",
    version="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 GES_DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.