edu.ucar.opensky::articles:10358 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T14:11:19.249317 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7736rcn Nitrogen oxides and PAN in plumes from boreal fires during ARCTAS-B and their impact on ozone: An integrated analysis of aircraft and satellite observations 2010-10-18T00:00:00Z publication https://n2t.org/ark:/85065/d7736rcn Alvarado, M. author Logan, J. author Mao, J. author Apel, Eric C. author Riemer, D. author Blake, D. author Cohen, R. author Min, K. author Perring, A. author Browne, E. author Wooldridge, P. author Diskin, G. author Sachse, G. author Fuelberg, H. author Sessions, W. author Harrigan, D. author Huey, G. author Liao, J. author Case-Hanks, A. author Jimenez, J. author Cubison, M. author Vay, S. author Weinheimer, Andrew author Knapp, David author Montzka, Denise D. author Flocke, Frank M. author Pollack, Ilana author Wennberg, P. author Kurten, A. author Crounse, J. author St. Clair, J. author Wisthaler, A. author Mikoviny, T. author Yantosca, R. author Carouge, C. author Le Sager, P. author UCAR/NCAR - Library publisher We determine enhancement ratios for NOx, PAN, and other NOy species from boreal biomass burning using aircraft data obtained during the ARCTAS-B campaign and examine the impact of these emissions on tropospheric ozone in the Arctic. We find an initial emission factor for NOx of 1.06 g NO per kg dry matter (DM) burned, much lower than previous observations of boreal plumes, and also one third the value recommended for extratropical fires. Our analysis provides the first observational confirmation of rapid PAN formation in a boreal smoke plume, with 40% of the initial NOx emissions being converted to PAN in the first few hours after emission. We find little clear evidence for ozone formation in the boreal smoke plumes during ARCTAS-B in either aircraft or satellite observations, or in model simulations. Only a third of the smoke plumes observed by the NASA DC8 showed a correlation between ozone and CO, and ozone was depleted in the plumes as often as it was enhanced. Special observations from the Tropospheric Emission Spectrometer (TES) also show little evidence for enhanced ozone in boreal smoke plumes between 15 June and 15 July 2008. Of the 22 plumes observed by TES, only 4 showed ozone increasing within the smoke plumes, and even in those cases it was unclear that the increase was caused by fire emissions. Using the GEOS-Chem atmospheric chemistry model, we show that boreal fires during ARCTAS-B had little impact on the median ozone profile measured over Canada, and had little impact on ozone within the smoke plumes observed by TES. 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) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. None eng geoscientificInformation