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

• DOI: 10.1038/s41598-017-06188-x
• Publication Date: 2017-07-14T12:04:16Z
• Authors: Manuel Dall’Osto; Jurgita Ovadnevaite; 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 Fa...; Roy M. Harrison; Colin O’Dowd; Rafel Simó
• Keywords: dimethylsulfide; biogenic organic nitrogen; Antàrtic, Oceà; aerosol; Nitrogen; po valley; Science; water; 01 natural sciences; Article; size distribution; pack ice; 14. Life underwater; 0105 earth and related environmental sciences; Aerosols; Q; R; marine aerosol; exopolymer particles; Antarctic Ocean; 13. Climate action; mass-spectrometer; sulfur; atmosphere; Medicine; Antarctica

AbstractClimate 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.