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Datasets/OMI_L2_NO2
d022·dataset

Air pollution (NO2) from traffic & industry

OMI L2 Tropospheric NO2 Column
GES DISC OMI_L2_NO2 13 × 24 km nadir daily (sun-sync, 1:38 PM) HDF5 atmosphereair-qualityurban-emissions

Long-term tropospheric NO2 record (2004+). Pre-TROPOMI / pre-TEMPO reference dataset for global air-quality trends.

OMI L2 Tropospheric NO2 Column

Long-term tropospheric NO2 record (2004+). Pre-TROPOMI / pre-TEMPO reference dataset for global air-quality trends.

Access

Gotchas

  • OMI row anomaly progressed since 2007; check spatial_quality_flag
  • 13×24 km nadir is coarser than modern TEMPO (2-4 km) or TROPOMI (3-5 km)
  • For analysis quality, prefer the OMNO2d Level-3 gridded product
  • Other datasets: d035

Sources

The access details, code, and sources below are kept in the original English for technical accuracy.

Quick access (cloud-direct)

omi_l2_no2_access.py
import earthaccess
earthaccess.login(strategy="netrc")

results = earthaccess.search_data(
    short_name="OMNO2",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),
    temporal=("2024-01-01", "2024-12-31"),
)
files = earthaccess.open(results)   # stream from GES DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.

📚 Problem Finder KB

Not yet tracked in the KB.