Halocarbons & other Atmospheric Trace Species Group (HATS)

monthly means

The general mission of the Halocarbons and other Atmospheric Trace Species group is to quantify the distributions and magnitudes of sources and sinks for atmospheric nitrous oxide (N2O) and halogen containing compounds. HATS utilizes numerous types of platforms, including ground-based stations, towers, ocean vessels, aircraft, and balloons to accomplish its mission.

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HATS Sites

Network Sites

The HATS group conducts several measurement projects at multiple sites around the world. This page displays a map and listing of the sites.

Products and Data

Hourly in situ observations of halocarbon gases provide information on transport, emissions, and trends.


Latest news on the HATS group, and learn more about the different types of compounds and their affect on stratospheric ozone.