Effect of ocean acidification on organic and inorganic speciation of trace metals

Stockdale, Anthony; Tipping, Edward ORCID: https://orcid.org/0000-0001-6618-6512; Lofts, Stephen ORCID: https://orcid.org/0000-0002-3627-851X; Mortimer, Robert J.G.. 2016 Effect of ocean acidification on organic and inorganic speciation of trace metals. Environmental Science & Technology, 50 (4). 1906-1913. 10.1021/acs.est.5b05624

Before downloading, please read NORA policies.

Preview

Text
N514127PP.pdf - Accepted Version
Download (815kB) | Preview

Official URL: http://dx.doi.org/10.1021/acs.est.5b05624

Abstract/Summary

Rising concentrations of atmospheric carbon dioxide are causing acidification of the oceans. This results in changes to the concentrations of key chemical species such as hydroxide, carbonate and bicarbonate ions. These changes will affect the distribution of different forms of trace metals. Using IPCC data for pCO2 and pH under four future emissions scenarios (to the year 2100) we use a chemical speciation model to predict changes in the distribution of organic and inorganic forms of trace metals. Under a scenario where emissions peak after the year 2100, predicted free ion Al, Fe, Cu, and Pb concentrations increase by factors of up to approximately 21, 2.4, 1.5, and 2.0 respectively. Concentrations of organically complexed metal typically have a lower sensitivity to ocean acidification induced changes. Concentrations of organically complexed Mn, Cu, Zn, and Cd fall by up to 10%, while those of organically complexed Fe, Co, and Ni rise by up to 14%. Although modest, these changes may have significance for the biological availability of metals given the close adaptation of marine microorganisms to their environment.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1021/acs.est.5b05624
UKCEH and CEH Sections/Science Areas:	Shore
ISSN:	0013-936X
NORA Subject Terms:	Ecology and Environment Marine Sciences
Date made live:	03 Aug 2016 10:32 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/514127

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1021/acs.est.5b05624

UKCEH and CEH Sections/Science Areas:

Shore

ISSN:

0013-936X

NORA Subject Terms:

Ecology and Environment
Marine Sciences

Date made live:

03 Aug 2016 10:32 +0 (UTC)