@Article{acpd-6-9517-2006, AUTHOR = {Vrekoussis, M. and Mihalopoulos, N. and Gerasopoulos, E. and Kanakidou, M. and Crutzen, P. and Lelieveld, J.}, TITLE = {Two-years of NO$_{3}$ radical observations in the boundary layer over the Eastern Mediterranean}, JOURNAL = {Atmospheric Chemistry and Physics Discussions}, VOLUME = {6}, YEAR = {2006}, NUMBER = {5}, PAGES = {9517--9544}, URL = {http://www.atmos-chem-phys-discuss.net/6/9517/2006/}, ISSN = {1680-7367} }