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Full catalog/TRPSYL2NH3AIRSFS
TRPSYL2NH3AIRSFS·v1·dataset

Ammonia in the air, quick summary (Aqua)

TROPESS AIRS-Aqua L2 Ammonia for Forward Stream, Summary Product V1 (TRPSYL2NH3AIRSFS) at GES DISC
atmosphere NASA GES_DISC Level 2 active
In plain English

What it measures. How much ammonia is in the air and how it's distributed up through the atmosphere, given as a streamlined daily summary with uncertainty estimates, at about 13.5 km detail.

How it's made. Retrieved from infrared readings by the AIRS instrument on NASA's Aqua satellite using the TROPESS project's optimal-estimation algorithm (MUSES).

How & where you'd use it. Useful for tracking ammonia pollution, which comes largely from agriculture, and studying its role in air quality and atmospheric chemistry.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › NITROGEN COMPOUNDS › AMMONIA

Coverage & cadence

  • Time span2002-08-30 → ongoing
  • Measured byAqua (AIRS)
  • Processing levelLevel 2
  • Spatial extent-180, -90, 180, 90
  • 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

The TROPESS AIRS-Aqua L2 Ammonia for Forward Stream, Summary Product contains the vertical distribution of the retrieved atmospheric state of ammonia (NH3), and formal uncertainties measured by the AIRS instrument on the EOS Aqua satellite. The forward stream standard product is global for the time period from 2021-02-01 to present. The NASA TRopospheric Ozone and Precursors from Earth System Sounding (TROPESS) project, uses an optimal estimation algorithm, known as the MUlti-SpEctra, MUlti-SpEcies, Multi-SEnsors (MUSES). The data files are written in the netCDF version 4 file format, and each file contains one day of data. The data have a spatial resolution of 13.5 km (AIRS nadir FOV), and are reported at 15 vertical levels from the surface to 0.1 hPa. The principal investigator for the TROPESS project is Kevin W. Bowman.

Get the data

trpsyl2nh3airsfs_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TRPSYL2NH3AIRSFS",
    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.