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LIDAR air pollution monitoring equipment

LIDAR air pollution monitoring equipment

E840/0251

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Credit

PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY

Caption

Pollution monitoring equipment. Technician operating a pump and probe LIDAR (Light Detection and Ranging) apparatus to measure air pollution levels. This equipment fires two laser beams (at left) into the sky. The first beam generates a strong concentration of hydroxyl radicals at a given point in the atmosphere. The second beam measures how long these highly reactive radicals survive. Hydroxyl radicals will be quickly destroyed by the large hydrocarbons found in a polluted atmosphere. Hence, if the radicals have a short lifetime, this indicates a highly polluted atmosphere. Photographed at Lausanne Polytechnic (EPFL), Switzerland.

Release details

Model release not available. Property release not required.

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