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Simultaneous Detection of Alkylamines in the Surface Ocean and Atmosphere of the Antarctic Sympagic Environment
- Source :
- Journal of the American Chemical Society (Online) 3 (2019): 854–862. doi:10.1021/acsearthspacechem.9b00028, info:cnr-pdr/source/autori:Dall'Osto, Manuel; Airs, Ruth L.; Beale, Rachael; Cree, Charlotte; Fitzsimons, Mark F.; Beddows, David; Harrison, Roy M.; Ceburnis, Darius; O'Dowd, Colin; Rinaldi, Matteo; Paglione, Marco; Nenes, Athanasios; Decesari, Stefano; Simó, Rafel/titolo:Simultaneous Detection of Alkylamines in the Surface Ocean and Atmosphere of the Antarctic Sympagic Environment/doi:10.1021%2Facsearthspacechem.9b00028/rivista:Journal of the American Chemical Society (Online)/anno:2019/pagina_da:854/pagina_a:862/intervallo_pagine:854–862/volume:3, Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2019
- Publisher :
- American Chemical Society (ACS), 2019.
-
Abstract
- 9 pages, supporting information https://dx.doi.org/10.1021/acsearthspacechem.9b00028<br />Measurements of alkylamines from seawater and atmospheric samples collected simultaneously across the Antarctic Peninsula, South Orkney and South Georgia Islands are reported. Concentrations of mono-, di-, and trimethylamine (MMA, DMA, and TMA, respectively), and their precursors, the quarternary amines glycine betaine and choline, were enhanced in sympagic seawater samples relative to ice-devoid pelagic ones, suggesting the microbiota of sea ice and sea ice-influenced ocean is a major source of these compounds. Primary sea-spray aerosol particles artificially generated by bubbling seawater samples were investigated by aerosol time-of-flight mass spectrometry (ATOFMS) of single particles; their mixing state indicated that alkylamines were aerosolized with sea spray from dissolved and particulate organic nitrogen pools. Despite this unequivocal sea spray-associated source of alkylamines, ATOFMS analyses of ambient aerosols in the sympagic region indicated that the majority (75-89%) of aerosol alkylamines were of secondary origin, that is, incorporated into the aerosol after gaseous air-sea exchange. These findings show that sympagic seawater properties are a source of alkylamines influencing the biogenic aerosol fluxed from the ocean into the boundary layer; these organic nitrogen compounds should be considered when assessing secondary aerosol formation processes in Antarctica<br />The study was supported by the Spanish Ministry of Economy through project BIOeNUC (CGL2013-49020-R), PI-ICE (CTM2017-89117-R) and the Ramon y Cajal fellowship (RYC-2012-11922), and by the EU though the FP7-PEOPLE-2013-IOF programme (Project number 624680, MANU - Marine Aerosol NUcleations), all to MD, and PEGASO (CTM2012-37615) to RS
- Subjects :
- Marine aerosol
Atmospheric Science
Surface ocean
secondary aerosols
polar emissions
mixing state
complex mixtures
atofms
chemical-characterization
Atmosphere
sulfuric-acid
Geochemistry and Petrology
Peninsula
concordia site
Southern Ocean
southern-ocean
southern ocean
polar ecology
geography
Polar ecology
geography.geographical_feature_category
Secondary Aerosols
containing particles
marine aerosol
boundary-layer
mass-spectrometry
polar biogeochemistry
Polar biogeochemistry
cloud condensation nuclei
Oceanography
Space and Planetary Science
Polar emissions
Environmental science
Seawater
size-segregated aerosol
ATOFMS
Subjects
Details
- ISSN :
- 24723452
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- ACS Earth and Space Chemistry
- Accession number :
- edsair.doi.dedup.....7f605e0a91fbe55f4adbab82907bcb56