Identification and source attribution of halocarbon emitters with longwave-infrared spectral imaging

摘要: Abstract Longwave-infrared (LWIR) spectral imaging offers a means for detecting and sourcing halocarbon emissions with high sensitivity, the principal classes of environmental concern being detectable at flux rates ~0.2–2 kg/h. Broad-area airborne LWIR surveys efficiently locate speciate on local to regional scales can promote more effective compliance efforts. Similar approaches also contribute situational awareness mitigation releases resulting from infrastructure damage following catastrophic events natural origin or occurring as consequence human action. Three U.S. urban domains were surveyed: Greater Los Angeles, San Francisco East Bay, New York City. In each California conurbations most frequently observed halocarbons HFC-134a, HCFC-22, HFC-152a while in HFC-32, HFC-134a prevalent. The common radiatively important non-halocarbon agents locale carbon dioxide methane.