Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

C. T. Lin; T. D. Jickells; A. R. Baker; A. Marca; M. T. Johnson

doi:10.1016/j.atmosenv.2016.03.020

Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

C. T. Lin, T. D. Jickells, A. R. Baker, A. Marca, M. T. Johnson

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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.

Original language	English
Pages (from-to)	165–169
Number of pages	5
Journal	Atmospheric Environment
Volume	133
Early online date	11 Mar 2016
DOIs	https://doi.org/10.1016/j.atmosenv.2016.03.020
Publication status	Published - May 2016

Keywords

Atlantic Ocean
Ammonium aerosol
15N

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10.1016/j.atmosenv.2016.03.020

Aerosol ammonium signatures over the remote Atlantic Ocean_submit finalAccepted author manuscript, 256 KBLicence: CC BY-NC-ND

Alex Baker
- Alex.Bakeruea.acuk
- School of Environmental Sciences - Professor of Marine and Atmospheric Chemistry
- Centre for Ocean and Atmospheric Sciences - Member
- ClimateUEA - Member
Person: Member, Research Group Member, Academic, Teaching & Research
Tim Jickells
- T.Jickellsuea.acuk
- School of Environmental Sciences - Emeritus Professor
- Centre for Ocean and Atmospheric Sciences - Member
- ClimateUEA - Member
Person: Honorary, Research Group Member
Alina Marca
- A.Marcauea.acuk
- School of Environmental Sciences - Research Officer
- Centre for Ocean and Atmospheric Sciences - Member
Person: Research & Analogous, Research Group Member

Cite this

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title = "Aerosol isotopic ammonium signatures over the remote Atlantic Ocean",

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.",

keywords = "Atlantic Ocean, Ammonium aerosol, 15N",

author = "Lin, {C. T.} and Jickells, {T. D.} and Baker, {A. R.} and A. Marca and Johnson, {M. T.}",

year = "2016",

month = may,

doi = "10.1016/j.atmosenv.2016.03.020",

language = "English",

volume = "133",

pages = "165–169",

journal = "Atmospheric Environment",

issn = "1352-2310",

publisher = "Elsevier",

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T1 - Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

AU - Lin, C. T.

AU - Jickells, T. D.

AU - Baker, A. R.

AU - Marca, A.

AU - Johnson, M. T.

PY - 2016/5

Y1 - 2016/5

N2 - 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.

AB - 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.

KW - Atlantic Ocean

KW - Ammonium aerosol

KW - 15N

U2 - 10.1016/j.atmosenv.2016.03.020

DO - 10.1016/j.atmosenv.2016.03.020

M3 - Article

VL - 133

SP - 165

EP - 169

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

ER -

Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

Abstract

Keywords

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Alex Baker

Tim Jickells

Alina Marca

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