The University of Southampton
University of Southampton Institutional Repository

Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean

Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean
Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean
Identifying the source of atmospheric dust is crucial to better understand the global marine biogeochemical cycle as phytoplankton growth relies on dissolved micronutrient elements available in the open ocean. Mineralogical, geochemical and Sr isotope analyses of a one year-time series (April 2003–April 2004) of deep ocean particle flux at the Madeira Abyssal Plain in the subtropical northeast Atlantic are presented. The lithogenic fraction has a high occurrence of palygorskite and smectite and an absence of kaolinite together with Sr isotopic compositions similar to the Northeast Atlantic aerosols. This indicates the Anti-Atlas Moroccan chain of Paleozoïc age as the source region. The lithogenic fraction supplies 4 times more Fe during a dust event than during the spring-summer aeolian input. A continuous input of only 1% of the lithogenic iron made available over a year period, could lead to an increase in primary productivity of 40% relative to today's value.
Saharan dust, geochemistry, micronutrient
0094-8276
L21604
Chavagnac, V.
0824a679-684f-47ba-8ccd-f8d36cc18d90
Waniek, J.J.
749b55a4-c736-4961-a522-37645dd73b45
Atkin, D.
1ac35c24-42bf-4b5e-b89a-8e7bebec477a
Milton, J.A.
9e183221-d0d4-4ddb-aeba-0fdde9d31230
Leipe, T.
bc2ea2d9-a553-4b27-8561-2c9f53d14bb2
Green, D.R.H.
0d7d86c4-d674-4514-8aa6-259134dc7b57
Bahlo, R.
245dbb7e-5e83-45e7-8606-47f086f28261
Hayes, T.E.F.
6ae4a438-3e78-4329-b509-b72b58edca51
Schulz-Bull, D.E.
18c86d5d-e496-4bf7-b820-36620d6ac002
Chavagnac, V.
0824a679-684f-47ba-8ccd-f8d36cc18d90
Waniek, J.J.
749b55a4-c736-4961-a522-37645dd73b45
Atkin, D.
1ac35c24-42bf-4b5e-b89a-8e7bebec477a
Milton, J.A.
9e183221-d0d4-4ddb-aeba-0fdde9d31230
Leipe, T.
bc2ea2d9-a553-4b27-8561-2c9f53d14bb2
Green, D.R.H.
0d7d86c4-d674-4514-8aa6-259134dc7b57
Bahlo, R.
245dbb7e-5e83-45e7-8606-47f086f28261
Hayes, T.E.F.
6ae4a438-3e78-4329-b509-b72b58edca51
Schulz-Bull, D.E.
18c86d5d-e496-4bf7-b820-36620d6ac002

Chavagnac, V., Waniek, J.J., Atkin, D., Milton, J.A., Leipe, T., Green, D.R.H., Bahlo, R., Hayes, T.E.F. and Schulz-Bull, D.E. (2007) Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean. Geophysical Research Letters, 34 (21), L21604. (doi:10.1029/2007GL030985).

Record type: Article

Abstract

Identifying the source of atmospheric dust is crucial to better understand the global marine biogeochemical cycle as phytoplankton growth relies on dissolved micronutrient elements available in the open ocean. Mineralogical, geochemical and Sr isotope analyses of a one year-time series (April 2003–April 2004) of deep ocean particle flux at the Madeira Abyssal Plain in the subtropical northeast Atlantic are presented. The lithogenic fraction has a high occurrence of palygorskite and smectite and an absence of kaolinite together with Sr isotopic compositions similar to the Northeast Atlantic aerosols. This indicates the Anti-Atlas Moroccan chain of Paleozoïc age as the source region. The lithogenic fraction supplies 4 times more Fe during a dust event than during the spring-summer aeolian input. A continuous input of only 1% of the lithogenic iron made available over a year period, could lead to an increase in primary productivity of 40% relative to today's value.

Full text not available from this repository.

More information

Published date: 16 November 2007
Keywords: Saharan dust, geochemistry, micronutrient
Organisations: Ocean and Earth Science, National Oceanography Centre,Southampton

Identifiers

Local EPrints ID: 50004
URI: https://eprints.soton.ac.uk/id/eprint/50004
ISSN: 0094-8276
PURE UUID: fe5f47c6-f61e-41e0-8b2e-dac283021f6a

Catalogue record

Date deposited: 09 Jan 2008
Last modified: 13 Mar 2019 20:52

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.

×