edu.ucar.opensky::articles:21680 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T16:00:17.653596 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7xg9txs Heterogenous N2O5 uptake during winter: Aircraft measurements during the 2015 WINTER Campaign and critical evaluation of current parameterizations 2018-04-27T00:00:00Z publication https://n2t.org/ark:/85065/d7xg9txs https://doi.org/10.1002/2018JD028336 McDuffie, E. E. author Fibiger, D. L. author Dubé, W. P. author Lopez-Hilfiker, F. author Lee, B. H. author Thornton, J. A. author Shah, V. author Jaeglé, L. author Guo, H. author Weber, R. J. author Reeves, John Michael author Weinheimer, Andrew author Schroder, J. C. author Campuzano-Jost, P. author Jimenez, J. L. author Dibb, J. E. author Veres, P. author Ebben, C. author Sparks, T. L. author Wooldridge, P. J. author Cohen, R. C. author Hornbrook, Rebecca author Apel, Eric C. author Campos, Teresa author Hall, Samuel R. author Ullmann, Kirk author Brown, S. S. author UCAR/NCAR - Library publisher Nocturnal dinitrogen pentoxide (N2O5) heterogeneous chemistry impacts regional air quality and the distribution and lifetime of tropospheric oxidants. Formed from the oxidation of nitrogen oxides, N2O5 is heterogeneously lost to aerosol with a highly variable reaction probability, (N2O5), dependent on aerosol composition and ambient conditions. Reaction products include soluble nitrate (HNO3 or NO3-) and nitryl chloride (ClNO2). We report the first-ever derivations of (N2O5) from ambient wintertime aircraft measurements in the critically important nocturnal residual boundary layer. Box modeling of the 2015 Wintertime INvestigation of Transport, Emissions, and Reactivity (WINTER) campaign over the eastern United States derived 2,876 individual (N2O5) values with a median value of 0.0143 and range of 2x10(-5) to 0.1751. WINTER (N2O5) values exhibited the strongest correlation with aerosol water content, but weak correlations with other variables, such as aerosol nitrate and organics, suggesting a complex, nonlinear dependence on multiple factors, or an additional dependence on a nonobserved factor. This factor may be related to aerosol phase, morphology (i.e., core shell), or mixing state, none of which are commonly measured during aircraft field studies. Despite general agreement with previous laboratory observations, comparison of WINTER data with 14 literature parameterizations (used to predict (N2O5) in chemical transport models) confirms that none of the current methods reproduce the full range of (N2O5) values. Nine reproduce the WINTER median within a factor of 2. Presented here is the first field-based, empirical parameterization of (N2O5), fit to WINTER data, based on the functional form of previous parameterizations. 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 2018 American Geophysical Union. None eng geoscientificInformation