Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

Lin, C.T., Jickells, T.D., Baker, A.R., 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
Depositing User: Pure Connector
Date Deposited: 22 Mar 2016 09:36
Last Modified: 17 Mar 2020 21:40
URI: https://ueaeprints.uea.ac.uk/id/eprint/57821
DOI: 10.1016/j.atmosenv.2016.03.020

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