Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica

J. Savarino, J. Kaiser, S. Morin, D. M. Sigman, M. H. Thiemens
2007 Atmospheric Chemistry and Physics  
Throughout the year 2001, aerosol samples were collected continuously for 10 to 15 days at the French Antarctic Station Dumont d'Urville (DDU) (66 • 40 ′ S, l40 • 01 ′ E, 40 m above mean sea level). The nitrogen and oxygen isotopic ratios of particulate nitrate at DDU exhibit seasonal variations that are among the most extreme observed for nitrate on Earth. In association with concentration measurements, the isotope ratios delineate four distinct periods, broadly consistent with previous stud
doi:10.5194/acp-7-1925-2007 fatcat:zjitckkttjfxdfv54yj6wsojqi