Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

Lin, C. T., Jickells, T. D., Baker, A. R. ORCID: https://orcid.org/0000-0002-8365-8953, Marca, A. and Johnson, M. T. (2016) Aerosol isotopic ammonium signatures over the remote Atlantic Ocean. Atmospheric Environment, 133. 165–169. ISSN 1352-2310

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Abstract

We report aerosol ammonium 15N signatures for samples collected from research cruises on the South Atlantic and Caribbean using a new high sensitivity method. We confirm a pattern of isotopic signals from generally light (δ15N -5 to -10‰), for aerosols with very low (<2nmol m-3) ammonium concentrations from the remote high latitude ocean, to generally heavier values (δ15N +5 to +10‰), for aerosols collected in temperate and tropical latitudes and with higher ammonium concentrations (>2nmol m-3). We discuss whether this reflects a mixing of aerosols from two end-members (polluted continental and remote marine emissions), or isotopic fractionation during aerosol transport.

Item Type:	Article
Uncontrolled Keywords:	atlantic ocean,ammonium aerosol,15n
Faculty \ School:	Faculty of Science > School of Environmental Sciences Faculty of Science > School of Natural Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups:	Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Depositing User:	Pure Connector
Date Deposited:	22 Mar 2016 09:36
Last Modified:	13 Apr 2023 13:48
URI:	https://ueaeprints.uea.ac.uk/id/eprint/57821
DOI:	10.1016/j.atmosenv.2016.03.020

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