Age range: 13 - 19
Resource type: video
Author: Philippe Keckhut
LIDAR (Light Detection and Ranging) makes it possible to measure many things in the atmosphere of the Earth: ozone, temperature, dust, clouds, etc. A laser emits a green light beam (it can also be blue, red or invisible to the eye) towards the sky and we look at the amount of light that is reflected (backscattered) by each atmospheric layer through the atmosphere to our telescope on the ground. Many LIDARs are operating in the Arctic scientific stations.
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