The Cd isotope composition of atmospheric aerosols from the Tropical Atlantic Ocean

Bridgestock, Luke and Rehkamper, Mark and van de Flierdt, Tina and Murphy, Katy and Khondoker, Roulin and Baker, Alex R. and Chance, Rosie and Strekopytov, Stanislav and Humphreys-Williams, Emma and Achterberg, Eric P. (2017) The Cd isotope composition of atmospheric aerosols from the Tropical Atlantic Ocean. Geophysical Research Letters, 44 (6). pp. 2932-2940. ISSN 0094–8276 DOI https://doi.org/10.1002/2017GL072748

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Abstract

Stable isotope compositions can potentially be used to trace atmospheric Cd inputs to the surface ocean and anthropogenic Cd emissions to the atmosphere. Both of these applications may provide valuable insights into the effects of anthropogenic activities on the cycling of Cd in the environment. However, a lack of constraints for the Cd isotope compositions of atmospheric aerosols is currently hindering such studies. Here we present stable Cd isotope data for aerosols collected over the Tropical Atlantic Ocean. The samples feature variable proportions of mineral dust-derived and anthropogenic Cd, yet exhibit similar isotope compositions, thus negating the distinction of these Cd sources by using isotopic signatures in this region. Isotopic variability between these two atmospheric Cd sources may be identified in other areas, and thus warrants further investigation. Regardless, these data provide important initial constraints on the isotope composition of atmospheric Cd inputs to the ocean.

Item Type:	Article
Uncontrolled Keywords:	NILAREP
Subjects:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title:	Geophysical Research Letters
Volume:	44
Page Range:	pp. 2932-2940
Identification Number:	https://doi.org/10.1002/2017GL072748
Depositing User:	Sarah Humbert
Date Deposited:	05 Nov 2020 17:02
Last Modified:	23 Nov 2020 17:24
URI:	http://eprints.esc.cam.ac.uk/id/eprint/4909

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