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National Institute of Standards and Technology (NIST) researchers upgraded their laser frequency-comb instrument to simultaneously measure nitrous oxide, carbon dioxide, water vapor, and the major air pollutants ozone and carbon monoxide. The NIST work specifically involves a shift from the spectrum of light analyzed in the near-infrared to the mid-infrared to enable the identification of more and different gases.
NIST’s older, near-infrared comb systems cannot identify nitrous oxide, ozone, or carbon monoxide; combined with an earlier version of the system that measures methane, NIST’s dual-comb technology can now measure all four primary greenhouse gases. The development could help in understanding and monitoring…READ MORE