ClimateWire: A new technique using a pair of laser-based instruments could one day help scientists more accurately detect concentrations of the greenhouse gases considered responsible for climate change.
Researchers at the National Institute of Standards and Technology (NIST) and the National Oceanic and Atmospheric Administration are refining a method using two frequency combs to indirectly measure the amount of carbon dioxide, methane and water vapor over a substantial distance.
A single frequency comb...