Aerosol isotopic ammonium signatures over the remote Atlantic Ocean

被引：20

作者：

Lin, C. T. ^{[1
]}

Jickells, T. D. ^{[1
]}

Baker, A. R. ^{[1
]}

Marca, A. ^{[1
]}

Johnson, M. T. ^{[1
]}

机构：

[1] Univ E Anglia, Ctr Ocean & Atmospher Sci, Sch Environm Sci, Norwich Res Pk, Norwich NR4 7TJ, Norfolk, England

来源：

ATMOSPHERIC ENVIRONMENT | 2016年 / 133卷

关键词：

Atlantic ocean; Ammonium aerosol; N-15; NITROGEN; EMISSION; DEPOSITION; FRESH; MODEL;

D O I：

10.1016/j.atmosenv.2016.03.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 (delta N-15 - 5 to -10%0), for aerosols with very low (<2 nmol m(-3)) ammonium concentrations from the remote high latitude ocean, to generally heavier values (815N +5 to +10%), for aerosols collected in temperate and tropical latitudes and with higher ammonium concentrations (>2 nmol 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. (C) 2016 Published by Elsevier Ltd.

引用

页码：165 / 169

页数：5

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