The GMD website may be unavailable from Tuesday, June 27, 5:00 PM through (approximately) noon on Wednesday, June 28 MDT due to building maintenance.

Welcome to the NOAA Carbon Cycle Greenhouse Gases group outreach website! We are the world's central location for monitoring greenhouse gases worldwide, and we are in charge of running a global air sampling network that continues to monitor the air we breathe. Click on a section of the diagram below to learn more about what we do.

Next: Air Sampling Network