ATom Air Parcel Reactivity Modeling Data Stream, 2016-2018

Four ATom campaigns from 2016 to 2018 provide a continuous 10-second data stream of atmospheric chemical species along flight paths. The Modeling Data Stream (MDS) and Reactivity Data Stream (RDS) products, created by the National Aeronautics and Space Administration, form a photochemical climatology for air parcels. This dataset details reactive species controlling methane loss and ozone production and loss.

Use Cases

• Modeling the photochemical reactivity (RDS) of air parcels using constituent concentrations from the MDS.
• Analyzing temporal trends in key atmospheric species like methane and ozone precursors at 10-second resolution.
• Studying global tropospheric chemistry across multiple campaigns and flight paths.
• Validating atmospheric chemistry models with in-situ, gap-filled measurements from selected instruments.
• Investigating instrument performance and data quality through provided source and gap-filling flags.

Strengths

• Data integrates measurements from multiple instruments, selecting values based on better coverage or greater precision.
• Missing values are addressed with interpolation for short gaps and multiple linear regression estimates for long gaps.
• Provides a continuous, high-temporal-resolution record with a 10-second sampling interval across four campaigns.
• Includes quality flags for instrument source and gap-filling status for all chemical species.

Limitations

• Specific column names, row counts, and dataset size are not provided by any source.
• Conflicting last update dates exist between platforms (2018-05-21 on NASA Earthdata and 2026-03-13 on Data.gov).

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Derived from in-situ measurements collected along ATom flight paths, integrated and gap-filled to create a continuous data stream.

Time Range

2016-2018

Freshness

2026-03-13 14:03:14.281467

Geography

Global, along ATom flight paths.