Ozone and Water Vapor - NOAA Global Monitoring Laboratory An official website of the United States government Here's how you know Official websites use .gov .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( ) or means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Global Monitoring Laboratory Ozone and Water Vapor Staff in GML’s Ozone and Water Vapor Division produce and disseminate highly accurate, long-term records of ozone and water vapor measurements from observation sites around the world. These measurements contribute to ongoing assessments of the health of Earth's ozone layer in response to NOAA’s Congressional mandate. NOAA upper troposphere lower stratospheric water vapor measurements are critical for satellite validation and monitoring changes in atmospheric composition at those locations in the atmospheric column. In particular, researchers in GML study the impacts of chemistry and transport on atmospheric composition, including impacts from sources such as volcanic eruptions, wildfire emissions, and anthropogenic activities. Staff measure ozone and water vapor with light-weight, balloon-borne and aircraft in situ instruments, surface monitors, and ground-based remote sensing instruments. Sites Datasets Data Viewer News Projects Total Ozone Surface Ozone Ozone Sondes Water Vapor Measurements Aircraft Measurements South Pole Ozone Hole Ozone sonde Profiles Total Column Ozone Ozone and Temperature Plots Ozone Hole Animations Ozone Depleting Gas Index Products and Data Dobson near real-time plots Surface Ozone Status plots Water Vapor Profile Plots Data Archive Research Stratospheric Aerosol Climatology and Ozone at UV Wavelengths Umkehr Ozone Profiles Ozone Research Theme Photo Gallery