By Patrick Cullis, CIRES and NOAA scientist

At the ozonesonde lab in Boulder, Colorado, part of NOAA’s Global Monitoring Laboratory, scientists prepare and launch ozonesondes to over 100,000 feet to directly measure Earth’s protective ozone layer. The researchers also ship supplies from the Boulder lab to NOAA’s Baseline Observatory at the South Pole, so technicians there can measure the ozone hole above Antarctica. Check out this video to learn more about the instruments we use to measure this important annual event!