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Full catalog/AERDB_L2G_GEOLEO_Merged
AERDB_L2G_GEOLEO_Merged·v1·dataset

Haze, dust and smoke, satellites merged (gridded)

GEO-LEO Merged Deep Blue Aerosol 0.25x0.25 degree Gridded L2
atmosphere NASA LAADS Level 2G netCDF-4
In plain English

What it measures. A merged, gridded estimate of how much haze, dust, and smoke is in the air (aerosol thickness), combining seven different satellites into one best-estimate map every 30 minutes.

How it's made. Built by blending aerosol readings from three geostationary imagers (GOES-16, GOES-17, Himawari-8) and four polar-orbiting instruments (VIIRS on two satellites, MODIS on Terra and Aqua) onto a quarter-degree grid using the Deep Blue method.

How & where you'd use it. Gives a continuous, gap-filled picture of airborne particles for air-quality and climate work. The first release covers May 2019 to April 2020.

What's measured

ATMOSPHERE › AEROSOLS › AEROSOL OPTICAL DEPTH/THICKNESSATMOSPHERE › AEROSOLS › AEROSOL OPTICAL DEPTH/THICKNESS › ANGSTROM EXPONENTATMOSPHERE › AEROSOLSATMOSPHERE › AEROSOLS › AEROSOL PARTICLE PROPERTIES

Coverage & cadence

  • Time span2019-05-01 → 2020-05-01
  • Measured byGOES-16 (ABI) · GOES-17 (ABI) · Himawari-8 (AHI) · Aqua (MODIS) · Terra (MODIS) · NOAA-20 (VIIRS) · Suomi-NPP (VIIRS)
  • Processing levelLevel 2G
  • Spatial extent-180, -90, 180, 90
  • FormatsnetCDF-4
  • 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 GEO-LEO Merged Deep Blue Aerosol 0.25x0.25 degree Gridded L2 product, short-name AERDB_L2G_GEOLEO_Merged contains gridded Aerosol Optical Thickness (AOT) at 550 nm reference wavelength, derived from seven merged GEO-LEO AOT layers (G16-ABI, G17-ABI, H08-AHI, SNPP-VIIRS, NOAA20-VIIRS, Terra MODIS and Aqua MODIS) and from each of the individual (three GEO and four LEO) instrument sources. Each L2G aggregated datafile is spatially comprised of a 0.25˚ x 0.25˚ horizontal grid that exists for every 30 minutes. This represents a 30-minute Deep Blue best-estimate AOT from each of the seven sources besides an error-weighted merged AOT layer. This first release of these products spans from May 2019 through April 2020 with a potential to generate additional temporal coverage in the future. The Level-2G (L2G) Geostationary Earth Orbit (GEO)-Low-Earth Orbit (LEO) Merged Deep Blue Aerosol 0.25 x 0.25-degree Gridded dataset is part of a 12-product suite produced by an Earth Science Research from Operational Geostationary Satellite Systems (ESROGSS)-funded project. The 12 products in this project include nine derived from three Geostationary Earth Observation (GEO) instruments and three from merged data from GEO and Low-Earth Orbit (LEO) instruments. The AERDB_L2G_GEOLEO_Merged product, in netCDF4 format, contains 16 GEO-LEO Merged Group Science Data Set (SDS) layers and 15 GEO and LEO SDSs.

Get the data

aerdb_l2g_geoleo_merged_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="AERDB_L2G_GEOLEO_Merged",
    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 LAADS
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.