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–A...
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2007
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Online Access: | https://oceanrep.geomar.de/id/eprint/29720/ https://oceanrep.geomar.de/id/eprint/29720/1/Chavagnac.pdf https://doi.org/10.1029/2007GL030985 |
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ftoceanrep:oai:oceanrep.geomar.de:29720 2023-05-15T17:41:02+02:00 Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean Chavagnac, V. Waniek, J. J. Atkin, D. Milton, J. A. Leipe, T. Green, D. R. H. Bahlo, R. Hayes, T. E. F. Schulz-Bull, D. E. 2007 text https://oceanrep.geomar.de/id/eprint/29720/ https://oceanrep.geomar.de/id/eprint/29720/1/Chavagnac.pdf https://doi.org/10.1029/2007GL030985 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/29720/1/Chavagnac.pdf 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 <https://doi.org/10.1029/2007GL030985>. doi:10.1029/2007GL030985 cc_by_3.0 Article PeerReviewed 2007 ftoceanrep https://doi.org/10.1029/2007GL030985 2023-04-07T15:20:44Z 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. Article in Journal/Newspaper Northeast Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 34 21 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Chavagnac, V. Waniek, J. J. Atkin, D. Milton, J. A. Leipe, T. Green, D. R. H. Bahlo, R. Hayes, T. E. F. Schulz-Bull, D. E. |
spellingShingle |
Chavagnac, V. Waniek, J. J. Atkin, D. Milton, J. A. Leipe, T. Green, D. R. H. Bahlo, R. Hayes, T. E. F. Schulz-Bull, D. E. Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean |
author_facet |
Chavagnac, V. Waniek, J. J. Atkin, D. Milton, J. A. Leipe, T. Green, D. R. H. Bahlo, R. Hayes, T. E. F. Schulz-Bull, D. E. |
author_sort |
Chavagnac, V. |
title |
Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean |
title_short |
Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean |
title_full |
Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean |
title_fullStr |
Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean |
title_full_unstemmed |
Anti-Atlas Moroccan Chain as the source of lithogenic-derived micronutrient fluxes to the deep Northeast Atlantic Ocean |
title_sort |
anti-atlas moroccan chain as the source of lithogenic-derived micronutrient fluxes to the deep northeast atlantic ocean |
publisher |
AGU (American Geophysical Union) |
publishDate |
2007 |
url |
https://oceanrep.geomar.de/id/eprint/29720/ https://oceanrep.geomar.de/id/eprint/29720/1/Chavagnac.pdf https://doi.org/10.1029/2007GL030985 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/29720/1/Chavagnac.pdf 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 <https://doi.org/10.1029/2007GL030985>. doi:10.1029/2007GL030985 |
op_rights |
cc_by_3.0 |
op_doi |
https://doi.org/10.1029/2007GL030985 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
21 |
_version_ |
1766142237481107456 |