The University of Southampton
University of Southampton Institutional Repository

Iron profiles and speciation of the upper water column at the Bermuda Atlantic Time-series Study site: a model based sensitivity study

Weber, Lisa, Voelker, Christoph, Oschlies, Andreas and Burchard, Hans (2007) Iron profiles and speciation of the upper water column at the Bermuda Atlantic Time-series Study site: a model based sensitivity study Biogeosciences, 4, pp. 689-706.

Record type: Article

Abstract

A one-dimensional model of the biogeochemistry and speciation of iron is coupled with the General Ocean Turbulence Model (GOTM) and a NPZD-type ecosystem model. The model is able to simulate the temporal patterns and vertical profiles of dissolved iron (dFe) in the upper ocean at the Bermuda Atlantic Time-series Study site reasonably well. Subsurface model profiles strongly depend on the parameter values chosen for the loss processes for iron, colloidal aggregation and scavenging onto particles. Estimates for these parameters based on observations in particle-rich waters result in depletion of dFe. A high stability constant of ironbinding organic ligands is required to reproduce the observed degree of organic complexation below the mixed layer. The scavenging residence time for iron in the model is shortest in spring and summer, because of the larger abundance of particles, and increases with depth towards values on the order of a hundred years. A solubility of atmospherically deposited iron higher than 2% lead to dFe concentrations incompatible with observations. Despite neglecting ultraviolet radiation, the model produces diurnal variations and mean vertical profiles of H2O2 and iron species that are in good agreement with observations.

Full text not available from this repository.

More information

Submitted date: 14 March 2007
Published date: 23 August 2007

Identifiers

Local EPrints ID: 48071
URI: http://eprints.soton.ac.uk/id/eprint/48071
ISSN: 1726-4170
PURE UUID: df3daddd-b864-4878-8302-6e36b31cd2b1

Catalogue record

Date deposited: 23 Aug 2007
Last modified: 17 Jul 2017 15:00

Export record

Contributors

Author: Lisa Weber
Author: Christoph Voelker
Author: Andreas Oschlies
Author: Hans Burchard

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×