@article{P_iv_rinta_2013, doi = {10.1002/jgrd.50486}, url = {https://doi.org/10.1002%2Fjgrd.50486}, year = 2013, month = {jun}, publisher = {American Geophysical Union ({AGU})}, volume = {118}, number = {12}, pages = {6837--6848}, author = {S.-M. Päivärinta and A. Seppälä and M. E. Andersson and P. T. Verronen and L. Thölix and E. Kyrölä}, title = {Observed effects of solar proton events and sudden stratospheric warmings on odd nitrogen and ozone in the polar middle atmosphere}, journal = {Journal of Geophysical Research: Atmospheres} }