Taking the Pulse of Greenhouse Gases Posted on July 21, 2019July 21, 2019 by Victor McDonald aeronauticsatmosphereatmospheric carbon dioxidecarbon dioxideclimate scienceEarth Scienceearth science researchengineeringEXPLORATIONgasesgreenhouse gasesIntegrated Path Differential AbsorptionLangley Research CenternasaNASA EarthNASA Earth ScienceNASA Langleyresearchsciencescience instrumentstechnologywater vapor