Volcanic ash as an oceanic iron source and sink
Volcanic ash deposition to the ocean forms a natural source of iron (Fe) to surface water microbial communities. Inputs of lithogenic material may also facilitate Fe removal through scavenging. Combining dissolved Fe (dFe) and thorium-234 observations alongside modelling, we investigate scavenging o...
Published in: | Geophysical Research Letters |
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Language: | English |
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Online Access: | https://oceanrep.geomar.de/id/eprint/31714/ https://oceanrep.geomar.de/id/eprint/31714/7/Rogan.pdf https://doi.org/10.1002/2016GL067905 |
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ftoceanrep:oai:oceanrep.geomar.de:31714 2023-05-15T16:09:26+02:00 Volcanic ash as an oceanic iron source and sink Rogan, Nicholas Achterberg, Eric P. Le Moigne, Frederic A. C. Marsay, Chris M. Tagliabue, Alessandro Williams, Richard G. 2016-03-28 text https://oceanrep.geomar.de/id/eprint/31714/ https://oceanrep.geomar.de/id/eprint/31714/7/Rogan.pdf https://doi.org/10.1002/2016GL067905 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/31714/7/Rogan.pdf Rogan, N., Achterberg, E. P. , Le Moigne, F. A. C., Marsay, C. M., Tagliabue, A. and Williams, R. G. (2016) Volcanic ash as an oceanic iron source and sink. Open Access Geophysical Research Letters, 43 (6). pp. 2732-2740. DOI 10.1002/2016GL067905 <https://doi.org/10.1002/2016GL067905>. doi:10.1002/2016GL067905 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1002/2016GL067905 2023-04-07T15:24:10Z Volcanic ash deposition to the ocean forms a natural source of iron (Fe) to surface water microbial communities. Inputs of lithogenic material may also facilitate Fe removal through scavenging. Combining dissolved Fe (dFe) and thorium-234 observations alongside modelling, we investigate scavenging of Fe in the North Atlantic following the Eyjafjallajökull volcanic eruption. Under typical conditions biogenic particles dominate scavenging, whereas ash particles dominate during the eruption. The size of particles is important as smaller scavenging particles can become saturated with surface-associated ions. Model simulations indicate that ash deposition associated with Eyjafjallajökull likely led to net Fe removal. Our model suggests a three-fold greater stimulation of biological activity if ash deposition had occurred later in the growing season when the region was Fe-limited. The implications of ash particle-scavenging, eruption timing and particle saturation need to be considered when assessing the impact of ash deposition on the ocean Fe cycle and productivity. Article in Journal/Newspaper Eyjafjallajökull North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 43 6 2732 2740 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Volcanic ash deposition to the ocean forms a natural source of iron (Fe) to surface water microbial communities. Inputs of lithogenic material may also facilitate Fe removal through scavenging. Combining dissolved Fe (dFe) and thorium-234 observations alongside modelling, we investigate scavenging of Fe in the North Atlantic following the Eyjafjallajökull volcanic eruption. Under typical conditions biogenic particles dominate scavenging, whereas ash particles dominate during the eruption. The size of particles is important as smaller scavenging particles can become saturated with surface-associated ions. Model simulations indicate that ash deposition associated with Eyjafjallajökull likely led to net Fe removal. Our model suggests a three-fold greater stimulation of biological activity if ash deposition had occurred later in the growing season when the region was Fe-limited. The implications of ash particle-scavenging, eruption timing and particle saturation need to be considered when assessing the impact of ash deposition on the ocean Fe cycle and productivity. |
format |
Article in Journal/Newspaper |
author |
Rogan, Nicholas Achterberg, Eric P. Le Moigne, Frederic A. C. Marsay, Chris M. Tagliabue, Alessandro Williams, Richard G. |
spellingShingle |
Rogan, Nicholas Achterberg, Eric P. Le Moigne, Frederic A. C. Marsay, Chris M. Tagliabue, Alessandro Williams, Richard G. Volcanic ash as an oceanic iron source and sink |
author_facet |
Rogan, Nicholas Achterberg, Eric P. Le Moigne, Frederic A. C. Marsay, Chris M. Tagliabue, Alessandro Williams, Richard G. |
author_sort |
Rogan, Nicholas |
title |
Volcanic ash as an oceanic iron source and sink |
title_short |
Volcanic ash as an oceanic iron source and sink |
title_full |
Volcanic ash as an oceanic iron source and sink |
title_fullStr |
Volcanic ash as an oceanic iron source and sink |
title_full_unstemmed |
Volcanic ash as an oceanic iron source and sink |
title_sort |
volcanic ash as an oceanic iron source and sink |
publisher |
AGU (American Geophysical Union) |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/31714/ https://oceanrep.geomar.de/id/eprint/31714/7/Rogan.pdf https://doi.org/10.1002/2016GL067905 |
genre |
Eyjafjallajökull North Atlantic |
genre_facet |
Eyjafjallajökull North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/31714/7/Rogan.pdf Rogan, N., Achterberg, E. P. , Le Moigne, F. A. C., Marsay, C. M., Tagliabue, A. and Williams, R. G. (2016) Volcanic ash as an oceanic iron source and sink. Open Access Geophysical Research Letters, 43 (6). pp. 2732-2740. DOI 10.1002/2016GL067905 <https://doi.org/10.1002/2016GL067905>. doi:10.1002/2016GL067905 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2016GL067905 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
6 |
container_start_page |
2732 |
op_container_end_page |
2740 |
_version_ |
1766405325753155584 |