TRPSCROH2H2D: Global Surface Hydroxyl Radical Concentrations

TROPESS Chemical Reanalysis v2 provides a 17-year global record of surface hydroxyl radical concentrations from 2005 to 2021. The dataset is generated using JPL's MOMO-Chem data assimilation framework, which optimizes concentrations and emissions from multiple satellite sensors. Data is stored in netCDF4 files with a 2-hourly temporal resolution and a 1.125 x 1.125 degree spatial grid.

Use Cases

• Analyzing the global oxidizing capacity of the atmosphere based on hydroxyl radical surface concentrations.
• Studying long-term trends in tropospheric chemistry from 2005 to 2021 using the reanalysis time series.
• Validating chemical transport model outputs against assimilated satellite observations from the TCR-2 framework.
• Investigating diurnal cycles of atmospheric hydroxyl using the 2-hourly temporal resolution data.

Strengths

• Covers a 17-year time period from 2005 to 2021, enabling long-term trend analysis.
• Uses a sophisticated multi-species data assimilation framework (MOMO-Chem) that optimizes both concentrations and emissions.
• Provides high temporal resolution data at 2-hourly intervals.
• Has a defined spatial resolution of 1.125 x 1.125 degrees.

Limitations

• Column names and a precise row or file size are not provided in the available metadata.
• Conflicting 'last updated' dates exist between sources (2026-04-09 vs. 2021-12-31).
• The license is ambiguously described as 'other-license-specified' without explicit terms.

Provenance

Source

NASA GES DISC, produced by principal investigator Kazuyuki Miyazaki.

Collection Method

Generated using JPL's Multi-mOdel Multi-cOnstituent Chemical (MOMO-Chem) data assimilation framework, assimilating data from multiple satellite sensors.

Time Range

2005 to 2021

Freshness

2026-04-09 21:37:23.981490

Geography

Global coverage with a 1.125 x 1.125 degree latitude-longitude grid.