The concentration of carbon dioxide in the atmosphere of six remote Arctic sites in Alaska, Canada, Iceland, Finland, and Norway reached 400 parts per million (ppm) this spring, according to measurements from the National Oceanic and Atmospheric Administration (NOAA). This marks the first time a monthly average measurement for CO2 attained the 400 ppm mark in a remote location.
Craig is KQED's science editor, specializing in weather, climate, water & energy issues, with a little seismology thrown in just to shake things up. Prior to his current position, he launched and led the station's award-winning multimedia project, Climate Watch. Craig is also an accomplished writer/producer of television documentaries, with a focus on natural resource issues. View all posts by Craig Miller →