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Stratospheric Aerosol and Gas Experiment (SAGE)

The Stratospheric Aerosol and Gas Experiment, SAGE, is a series of instruments designed by NASA to observe stratospheric ozone, aerosols, and water vapor from space. In the mid-1980s, scientists realized there was a problem with Earth’s protective coat of ozone...it was thinning. The SAGE family of instruments was pivotal in making accurate measurements of the amount of ozone loss in Earth’s atmosphere and helped leaders around the world institute an international treaty banning products containing harmful chemicals that destroy stratospheric ozone. SAGE is a key part of NASA’s mission to provide crucial, long-term measurements that will help humans better understand and care for Earth’s atmosphere.

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  • Successful Eighth Annual Science Team Meeting

    The Stratospheric Aerosol and Gas Experiment (SAGE) III instrument was launched in February 2017 to the International Space Station (ISS) and continues to provide the public and science community with world-class ozone, aerosol, and water vapor data products. The annual SAGE III/ISS Science Team meeting was held as a hybrid event hosted at NASA Langley […]

  • SAGE III/ISS Observes 2025 Wildfire Season

    The 2025 wildfire season in Canada has been long and widespread with over 6.8 million hectares burned as of August 6, 2025, placing this year in the top 5 seasons, but less than half the size of the devastating 2023 season, according to the Canadian Wildfire Information System. Smoke from the fires traveled to the […]