Evidence for large average concentrations of the nitrate radical (NO3) in Western Europe from the HANSA hydrocarbon database.

Penkett, S.A.; Burgess, R.A.; Coe, H.; Coll, I.; Hov, Ø.; Lindskog, A.; Schmidbauer, N.; Solberg, S.; Roemer, M.; Thijsse, T.; Beck, J.; Reeves, C.E.