Field measurements of OH and HO2 radicals have been made using the University of Leeds ground-based FAGE instrument since 1996, and with the aircraft instrument since 2004. The instruments have been deployed at a variety of locations world-wide ranging from urban to clean marine atmospheres. Each location offers it's own unique challenges, but by conducting this work we are able to assess our understanding of the chemical processes occurring in these regions by comparing the results collected with detailed chemical models, such as those based on the MCM.
Field measurements of the OH lifetime have also been made by the group at a number of locations. This instrument can provide a measure of the total OH sink and this can be extremely useful when assessing the completeness of chemical models.
LIF IO measurements were first made by the group in 2006 as part of the RHaMBLe project, which aimed to quantify the impacts of marine halogen emissions. Both the ground-based and aircraft FAGE instruments have sucessfully detected the IO radical in the MBL, providing the first in-situ detection method for this radical.
Please follow the links on the right for further information on the field projects we have been involved in and details of current projects.