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Full catalog/TRPSCRCH2O2H2D
TRPSCRCH2O2H2D·v1·dataset

Formaldehyde pollution near the ground (every 2 hours)

TROPESS Chemical Reanalysis Surface CH2O 2-Hourly 2-dimensional Product V1 (TRPSCRCH2O2H2D) at GES DISC
atmosphere NASA GES_DISC Level 4
In plain English

What it measures. Amounts of formaldehyde (a gas tied to wildfires, vegetation, and pollution chemistry) right at the ground level, given every two hours.

How it's made. Comes from a computer reanalysis (TCR-2) that blends multiple satellites' measurements with a chemistry model, covering 2005 through 2021.

How & where you'd use it. Useful for studying air quality and the chemistry that forms smog, and for seeing how formaldehyde levels shift through the day and across regions.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › CARBON AND HYDROCARBON COMPOUNDS › FORMALDEHYDE

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 CH2O 2-Hourly 2-dimensional Product contains surface concentrations of formaldehyde. 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

trpscrch2o2h2d_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TRPSCRCH2O2H2D",
    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.