The University of Southampton
University of Southampton Institutional Repository

Spatially complex distribution of dissolved manganese in a fjord as revealed by high-resolution in situ sensing using the Autonomous Underwater Vehicle Autosub

Statham, P.J., Connelly, D.P., German, C.R., Brand, T., Overnell, J.O., Bulukin, E., Millard, N., McPhail, S., Pebody, M., Perrett, J., Squires, M., Stevenson, P. and Webb, A. (2005) Spatially complex distribution of dissolved manganese in a fjord as revealed by high-resolution in situ sensing using the Autonomous Underwater Vehicle Autosub Environmental Science and Technology Library, 39, (24), pp. 9440-9445. (doi:10.1021/es050980t).

Record type: Article

Abstract

Loch Etive is a fjordic system on the west coast of Scotland. The deep waters of the upper basin are periodically isolated, and during these periods oxygen is lost through benthic respiration and concentrations of dissolved manganese increase. In April 2000 the autonomous underwater vehicle (AUV) Autosub was fitted with an in situ dissolved manganese analyzer and was used to study the spatial variability of this element together with oxygen, salinity, and temperature throughout the basin. Six along-loch transects were completed at either constant height above the seafloor or at constant depth below the surface. The ca. 4000 in situ 10-s-average dissolved Mn (Mnd) data points obtained provide a new quasi-synoptic and highly detailed view of the distribution of manganese in this fjordic environment not possible using conventional (water bottle) sampling. There is substantial variability in concentrations (<25 to >600 nM) and distributions of Mnd. Surface waters are characteristically low in Mnd reflecting mixing of riverine and marine end-member waters, both of which are low in Mnd. The deeper waters are enriched in Mnd, and as the water column always contains some oxygen, this must reflect primarily benthic inputs of reduced dissolved Mn. However, this enrichment of Mnd is spatially very variable, presumably as a result of variability in release of Mn coupled with mixing of water in the loch and removal processes. This work demonstrates how AUVs coupled with chemical sensors can reveal substantial small-scale variability of distributions of chemical species in coastal environments that would not be resolved by conventional sampling approaches. Such information is essential if we are to improve our understanding of the nature and significance of the underlying processes leading to this variability.

Full text not available from this repository.

More information

Published date: 2005

Identifiers

Local EPrints ID: 24132
URI: http://eprints.soton.ac.uk/id/eprint/24132
ISSN: 1382-3124
PURE UUID: 5676b499-7f89-4e06-97cd-bac180d3b589

Catalogue record

Date deposited: 22 Mar 2006
Last modified: 17 Jul 2017 16:14

Export record

Altmetrics

Contributors

Author: P.J. Statham
Author: D.P. Connelly
Author: C.R. German
Author: T. Brand
Author: J.O. Overnell
Author: E. Bulukin
Author: N. Millard
Author: S. McPhail
Author: M. Pebody
Author: J. Perrett
Author: M. Squires
Author: P. Stevenson
Author: A. Webb

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.

×