@Article{acpd-9-21111-2009,
AUTHOR = {Chan, E. and Vet, R. J.},
TITLE = {Background ozone over Canada and the United States},
JOURNAL = {Atmospheric Chemistry and Physics Discussions},
VOLUME = {9},
YEAR = {2009},
NUMBER = {5},
PAGES = {21111--21164},
URL = {http://www.atmos-chem-phys-discuss.net/9/21111/2009/},
DOI = {10.5194/acpd-9-21111-2009}
}