ATom Airborne Hydrogen Oxides Measurements from ATHOS Sensor

Hydrogen oxide mixing ratios measured by the Airborne Tropospheric Hydrogen Oxides Sensor (ATHOS) during the ATom 1-4 campaigns. The dataset includes simultaneous measurements of hydroxide (OH) and hydroperoxyl (HO2) using laser-induced fluorescence, along with OH reactivity data. It is provided by ORNL_CLOUD and was last updated in 2026.

Use Cases

• Testing and validating atmospheric oxidation chemistry in global climate models.
• Analyzing the oxidative state of the global atmosphere using OH and HO2 mixing ratios.
• Studying tropospheric chemistry by examining OH reactivity measurements.
• Comparing in-situ airborne measurements with satellite-derived atmospheric data.

Strengths

• Data originates from four distinct ATom campaigns, providing repeated global-scale sampling.
• Simultaneous measurement of OH and HO2 using the laser-induced fluorescence method ensures internal consistency.
• Cross-platform presence on NASA Earth Data and Data.gov signals its recognized importance for atmospheric science.

Limitations

• Key metadata such as row count, column names, and dataset size are unavailable across all sources.
• Conflicting last updated dates exist between sources (2026-03-13 and 2018-05 21).

Provenance

Source

ORNL_CLOUD

Collection Method

Airborne measurements using the ATHOS sensor with laser-induced fluorescence (LIF) and an integrated OH Reactivity (OHR) instrument.

Time Range

ATom 1-4 campaigns

Freshness

2026-03-13 13:59:30.914781

Geography

Global atmosphere, tropospheric coverage