Acknowledgement
ATA thanks GWR and the U.K. Met. Office for funding (studentship),
MCC thanks EPSRC for a studentship, DES and CJP thank
NERC and Bristol ChemLabS under whose auspices various aspects
of this work was funded.
Appendix A. Supplementary data
Supplementary data related to this article can be found at http://
dx.doi.org/10.1016/j.atmosenv.2015.02.020.