edu.ucar.opensky::articles:24957 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T22:56:30.881932 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7z03cpg https://doi.org/10.25675/10217/228793 https Related Dataset #1 Cross-Track Infrared Sounder (CrIS) Peroxyacetyl Nitrate (PAN) and Carbon Monoxide (CO) retrievals for the 2018 wildfire season over the western U.S. https://doi.org/10.5067/9NPOTPIPLMAW https Related Dataset #2 Suomi NPP CrIS Level 1B Full Spectral Resolution V2 Evolution of Acyl Peroxynitrates (PANs) in wildfire smoke plumes detected by the Cross-track Infrared Sounder (CrIS) over the Western U.S. during summer 2018 2021-12-16T00:00:00Z publication https://n2t.org/ark:/85065/d7z03cpg https://doi.org/10.1029/2021GL093405 Juncosa Calahorrano, J. F. author Payne, V. H. author Kulawik, S. author Ford, B. author Flocke, Frank M. author Campos, Teresa author Fischer, E. V. author UCAR/NCAR - Library publisher We use observations of acyl peroxynitrates (PANs) from the Cross-Track Infrared Sounder (CrIS) to investigate PANs over the western U.S. during the summer 2018 wildfire season. This period coincides with the Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN). When combined with favorable background conditions, the resolution and sensitivity of CrIS is sufficient to observe the production of PANs in smoke plumes. CrIS PANs normalized excess mixing ratios with respect to CO (NEMRs) in the Pole Creek Fire increase from 0.2% to 0.4% within 3-4 hr of physical aging, consistent with in situ NEMRs. CrIS is also able to detect PANs enhancements in plumes that have been transported hours to days downwind. On average for summer 2018, 19-56% of PANs in the free troposphere during the afternoon over the western U.S. can be attributed to smoke. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation