TRPSYL2NH3CRS1FS: Global Ammonia Vertical Profiles from NOAA-20 Satellite

15 vertical levels from the surface to 0.1 hPa provide the retrieved atmospheric state of ammonia (NH3). The TROPESS CrIS-JPSS1 L2 Ammonia Summary Product contains daily global data from April 2021 onward, derived from the CrIS instrument on the NOAA-20 satellite using the MUSES optimal estimation algorithm. Each netCDF4 file has a spatial resolution of 14 km at nadir.

Use Cases

• Monitoring global ammonia pollution sources and trends based on daily vertical profiles.
• Assessing the impact of agricultural and industrial emissions on atmospheric chemistry using the 15-level vertical distribution.
• Validating and improving atmospheric models with satellite-derived ammonia concentrations and formal uncertainties.
• Studying tropospheric ozone precursor dynamics as part of the TROPESS project's multi-species retrievals.

Strengths

• Provides vertical profiles at 15 specific levels from the surface to 0.1 hPa.
• Offers global coverage with a consistent 14 km spatial resolution at nadir.
• Uses a sophisticated optimal estimation algorithm (MUSES) for multi-spectral, multi-species retrieval.
• Data collection is ongoing from April 1, 2021, providing a continuous time series.

Limitations

• Column names and specific variable details are not provided in the available metadata.
• The exact data volume (rows, size) is unknown across all sources.
• License is ambiguously listed as 'other-license-specified' without further detail.

Provenance

Source

NASA TROPESS project, Principal Investigator Kevin W. Bowman, data from CrIS instrument on JPSS-1 (NOAA-20) satellite.

Collection Method

Retrieved via optimal estimation algorithm (MUSES) from satellite spectrometer measurements.

Time Range

From 2021-04-01 to present.

Freshness

2026-04-09 21:23:30.836002

Geography

Global.