TRPSCRHNO36H3D: Global Nitric Acid Concentrations from Tropospheric Reanalysis

TROPESS Chemical Reanalysis v2 (TCR-2) provides a 17-year global record of nitric acid concentrations, a key atmospheric pollutant and precursor to aerosols. The dataset is produced using JPL's MOMO-Chem data assimilation framework, which simultaneously optimizes concentrations and emissions from multiple satellite sensors. Each netCDF file contains a year of data at 6-hourly intervals across 27 vertical pressure levels from 1000 to 60 hPa.

Use Cases

• Analyzing long-term trends in nitric acid concentrations based on the 2005-2021 time series.
• Validating atmospheric chemistry models using the 3-dimensional, assimilated concentration fields.
• Studying the vertical distribution of nitrogen compounds across 27 pressure levels.
• Investigating seasonal and diurnal cycles of atmospheric pollutants using the 6-hourly temporal resolution.

Strengths

• Covers a 17-year period (2005-2021), enabling long-term trend analysis.
• Provides high-resolution 3D data with 6-hourly temporal and 1.125-degree spatial resolution.
• Uses a sophisticated multi-species, multi-sensor data assimilation framework (MOMO-Chem) for consistency.

Limitations

• Specific column names and data volume are not documented in the provided metadata.
• License is ambiguously described as 'other-license-specified' without clear terms.
• Data freshness is unclear; the last metadata update is listed as 2026, which may be an administrative artifact.

Provenance

Source

National Aeronautics and Space Administration (NASA), Jet Propulsion Laboratory (JPL). Principal Investigator: Kazuyuki Miyazaki.

Collection Method

Data assimilation using the Multi-mOdel Multi-cOnstituent Chemical (MOMO-Chem) framework applied to multiple satellite sensor observations.

Time Range

2005 to 2021

Freshness

2026-04-09 21:25:20.497730 (from datagov, but may be a future date placeholder)

Geography

Global coverage at a spatial resolution of 1.125 x 1.125 degrees.