edu.ucar.opensky::articles:18008 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:58:13.642638 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7gq709d Chemistry-turbulence interactions and mesoscale variability influence the cleansing efficiency of the atmosphere 2015-12-28T00:00:00Z publication https://n2t.org/ark:/85065/d7gq709d https://doi.org/10.1002/2015GL066641 Kaser, Lisa author Karl, Thomas author Yuan, B. author Mauldin, R. author Cantrel, C. author Guenther, A. author Patton, Edward G. author Weinheimer, Andrew author Knote, Christoph author Orlando, John J. author Emmons, Louisa K. author Apel, Eric C. author Hornbrook, Rebecca author Shertz, Stephen R. author Ullmann, Kirk author Hall, Samuel R. author Graus, M. author De Gouw, J. author Zhou, X. author Ye, C. author UCAR/NCAR - Library publisher The hydroxyl radical (OH) is the most important oxidant in the atmosphere and the primary sink for isoprene, the dominant volatile organic compound emitted by vegetation. Recent research on the atmospheric oxidation capacity in isoprene-dominated environments has suggested missing radical sources leading to significant overestimation of the lifetime of isoprene. Here we report, for the first time, a comprehensive experimental budget of isoprene in the planetary boundary layer based on airborne flux measurements along with in situ OH observations in the Southeast and Central U.S. Our findings show that surface heterogeneity of isoprene emissions lead to a physical separation of isoprene and OH resulting in an effective slowdown in the chemistry. Depending on surface heterogeneity, the intensity of segregation (Is) could locally slow down isoprene chemistry up to 30%. The effect of segregated reactants in the planetary boundary layer on average has an influence on modeled OH radicals that is comparable to that of recently proposed radical recycling mechanisms. 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 2015 American Geophysical Union. None eng geoscientificInformation