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University of Michigan Biological Station

The University of Michigan Biological Station (UMBS) was founded in 1909.

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Ozone reactivity rates with respect to biogenic volatile organic compounds (VOC)

Atmospheric
CABINEX
Project Abstract: 
A three week experiment associated with the CABINEX project based around the PROPHET tower. Project goal is to examine ozone reactivity rates with respect to biogenic volatile organic compounds (VOC). Comparison of these measured reactivity rates with lab studies may suggest that there are unaccounted reactions taking place that are currently not understood. Using branch enclosure techniques to isolate biogenic VOC emissions, ozone will be introduced to reactivity chambers and allowed to react. Using differential ozone monitors, ozone reactivity rates with respect to VOC reactions may be determined. Additionally, VOC samples will be taken before and after the addition of ozone. Samples will be analyzed using GC/MS/FID.
Investigator(s): 
Ryan W. Daly
Status of Research Project: 
Complete (archive)
Related data sets: 
Tropospheric oxidant measurements from the 2009 CABINEX campaign
Years Active: 
2009
Research sites: 
UMBS PROPHET Tower
Methods: 
Emissions from vegetation are combined with a flow of ozone-enriched air and allowed to react in a flow reactor. Ozone is measured upstream and downstream of the reactor with a single instrument. In the standard configuration of a UV absorption ozone monitor, ozone-containing air and scrubbed air (ozone-free air) are either measured sequentially (one optical cell) or in parallel (two cell instruments), with the ozone mole fraction then determined following the Beer–Lambert law.
Funding agency: 
NSF