Dr. Rebecca Hornbrook is a member of the VOC Measurement Group in the Atmospheric Chemistry Observations & Modeling laboratory at NCAR. Her research interests center on the atmospheric emissions and fate of volatile organic compounds (VOCs), both natural and anthropogenic. She earned her Ph.D. at York University in Toronto, Canada in 2005, and has over 25 years of experience in the measurement and analysis of gas-phase VOCs. She has been involved in laboratory studies of processes involved in tropospheric oxidation of VOCs, including work she led developing the methodology for measuring stable carbon kinetic isotope effects in the reactions of non-methane hydrocarbons with OH radicals and Cl atoms. She also spent several years measuring hydroperoxy and organic peroxy radicals (HO2 and RO2) using Chemical Ionization Mass Spectrometry (CIMS), studying photochemical processes involved in VOC oxidation. In recent years at NCAR, Dr. Hornbrook has participated in the development and deployment of state-of-the-art instrumentation to measure VOCs in the atmosphere, contributing significantly to the measurement capabilities of the Trace Organic Gas Analyzer (TOGA), both in measurement frequency and the growing suite of quantifiable VOCs. As a member of the TOGA team, she has participated in a large number of NSF and NASA-funded field campaigns, both airborne and ground-based, including OASIS-2009, BEACHON-ROCS, TORERO, DC3, NOMADSS, CONTRAST, FRAPPÉ, WINTER, ORCAS, ATom, WE-CAN, FIREX-AQ, and most recently TI3GER and ACCLIP.