What are the major volatile organic carbon influences on the remote pristine troposphere?

Eric C Apel1, Rebecca S Hornbrook1, Alan J Hills1, Siyuan Wang1, Louisa K Emmons1, Rebecca Schwantes2 and ATom Science Team, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)National Center for Atmospheric Research, Atmospheric Chemistry Observations & Modeling Laboratory, Boulder, CO, United States