The University of Southampton
University of Southampton Institutional Repository

Attenuation of particulate organic carbon flux in the Scotia Sea, Southern Ocean, is controlled by zooplankton fecal pellets

Attenuation of particulate organic carbon flux in the Scotia Sea, Southern Ocean, is controlled by zooplankton fecal pellets
Attenuation of particulate organic carbon flux in the Scotia Sea, Southern Ocean, is controlled by zooplankton fecal pellets
The Southern Ocean (SO) is an important CO2 reservoir, some of which enters via the production, sinking and remineralization of organic matter. Recent work suggests the fraction of production that sinks is inversely related to production in the SO, a suggestion we confirm from 20 stations in the Scotia Sea. The efficiency with which exported material is transferred to depth (transfer efficiency) is believed to be low in high latitude systems. However, our estimates of transfer efficiency are bimodal, with stations in the seasonal ice zone showing intense losses and others displaying increases in flux with depth. Zooplankton fecal pellets dominated organic carbon flux and at stations with transfer efficiency >100 % fecal pellets were brown, indicative of fresh phytodetritus. We suggest that active flux mediated by zooplankton vertical migration and the presence of sea ice regulate the transfer of organic carbon into the oceans interior in the Southern Ocean.
carbon export, marine particles, transfer efficiency
0094-8276
821-830
Cavan, E.L.
aca6bc0e-f2ba-4378-8be6-4da7e1e9da31
Le Moigne, F.A.C.
548c65d1-ce2d-4302-8d64-e80a964533b5
Poulton, A.J.
14bf64a7-d617-4913-b882-e8495543e717
Tarling, G.A.
11c6c41e-2840-4c60-b262-b404e58607ee
Ward, P.
be8f5e51-8144-43cf-8c11-e0c7cf87b86c
Daniels, C.J.
e4a51f9d-efe6-413a-8d3f-3f1eda5ce79f
Fragoso, G.
bc4c50bc-6e76-451a-9409-0949789b29b0
Sanders, R.J.
02c163c1-8f5e-49ad-857c-d28f7da66c65
Cavan, E.L.
aca6bc0e-f2ba-4378-8be6-4da7e1e9da31
Le Moigne, F.A.C.
548c65d1-ce2d-4302-8d64-e80a964533b5
Poulton, A.J.
14bf64a7-d617-4913-b882-e8495543e717
Tarling, G.A.
11c6c41e-2840-4c60-b262-b404e58607ee
Ward, P.
be8f5e51-8144-43cf-8c11-e0c7cf87b86c
Daniels, C.J.
e4a51f9d-efe6-413a-8d3f-3f1eda5ce79f
Fragoso, G.
bc4c50bc-6e76-451a-9409-0949789b29b0
Sanders, R.J.
02c163c1-8f5e-49ad-857c-d28f7da66c65

Cavan, E.L., Le Moigne, F.A.C., Poulton, A.J., Tarling, G.A., Ward, P., Daniels, C.J., Fragoso, G. and Sanders, R.J. (2015) Attenuation of particulate organic carbon flux in the Scotia Sea, Southern Ocean, is controlled by zooplankton fecal pellets. Geophysical Research Letters, 42 (3), 821-830. (doi:10.1002/2014GL062744).

Record type: Article

Abstract

The Southern Ocean (SO) is an important CO2 reservoir, some of which enters via the production, sinking and remineralization of organic matter. Recent work suggests the fraction of production that sinks is inversely related to production in the SO, a suggestion we confirm from 20 stations in the Scotia Sea. The efficiency with which exported material is transferred to depth (transfer efficiency) is believed to be low in high latitude systems. However, our estimates of transfer efficiency are bimodal, with stations in the seasonal ice zone showing intense losses and others displaying increases in flux with depth. Zooplankton fecal pellets dominated organic carbon flux and at stations with transfer efficiency >100 % fecal pellets were brown, indicative of fresh phytodetritus. We suggest that active flux mediated by zooplankton vertical migration and the presence of sea ice regulate the transfer of organic carbon into the oceans interior in the Southern Ocean.

PDF
grl52553.pdf - Version of Record
Available under License Creative Commons Attribution.
Download (1MB)

More information

Accepted/In Press date: January 2015
Published date: 16 February 2015
Keywords: carbon export, marine particles, transfer efficiency
Organisations: Ocean and Earth Science, Marine Biogeochemistry

Identifiers

Local EPrints ID: 373485
URI: https://eprints.soton.ac.uk/id/eprint/373485
ISSN: 0094-8276
PURE UUID: ea0f1b91-ffbe-4b1a-8457-e398a30ca618

Catalogue record

Date deposited: 19 Jan 2015 16:12
Last modified: 17 Jul 2017 21:33

Export record

Altmetrics

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 https://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.

×