Laser Comb Measures Greenhouse Gases (IMAGE)

National Institute of Standards and Technology (NIST)

Laser Comb Measures Greenhouse Gases

Caption

NIST researchers used a laser frequency-comb instrument (illustration at lower right) to simultaneously measure three airborne greenhouse gases -- nitrous oxide, carbon dioxide and water vapor -- plus the major air pollutants ozone and carbon monoxide over two round-trip paths (arrows) from a NIST building in Boulder, Colo., to a reflector on a balcony of another building, and another reflector on a nearby hill.

Credit

N. Hanacek/NIST

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