Antarctic sea ice region as a source of biogenic organic nitrogen in aerosols

Manuel  Dall’Osto, Jurgita  Ovadn evaite, Marco  Paglione, David C. S.  Beddows,  Darius  Ceburnis, Charlotte Cree, Pau  Cortés, Marina  Zamanillo, Sdena O.  Nunes, Gonzalo  L.  Pérez, Eva  Ortega-Retuerta, Mikhail  Emelianov, Dolors  Vaqué, Cèlia  Marrasé, Marta  Estrada, M. Montserrat  Sala, Montserrat  Vidal, Mark F.  Fitzsimons, Rachael  Beale, Ruth  Airs, Matteo Rinaldi, Stefano  Decesari, Maria  Cristina Facchini, Roy M.  Harrison,  Colin  O’Dowd & Rafel  Simó
Antarctic sea ice region as a source  of biogenic organic nitrogen in  aerosols
ScientificReports 7:6047  DOI:10.1038/s41598-017-06188

Pubblicato il 20 Luglio 2017

Abstract:
Climate warming affects the development and distribution of sea ice, but at present the evidence of polar ecosystem feedbacks on climate through changes in the atmosphere is sparse. By means of synergistic atmospheric and oceanic measurements in the Southern Ocean near Antarctica, we present evidence that the microbiota of sea ice and sea ice-influenced ocean are a previously unknown significant source of atmospheric organic nitrogen, including low molecular weight alkyl-amines. Given the keystone role of nitrogen compounds in aerosol formation, growth and neutralization, our findings call for greater chemical and source diversity in the modelling efforts linking the marine ecosystem to aerosol-mediated climate effects in the Southern Ocean.