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.
Summertime in the northern mid-latitudes all too often means large scale wildfires, and 2026 is no exception to that cycle with huge fires burning in Canada and the western US since early-July and recently in western Europe. Smoke from the wildfires in Canada was transported 1000s of miles exclusively in the troposphere to the US […]
