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 modeling, we investigate scavenging of...
Published in: | Geophysical Research Letters |
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2016
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ftsouthampton:oai:eprints.soton.ac.uk:390201 2023-07-30T04:03:22+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 text https://eprints.soton.ac.uk/390201/ https://eprints.soton.ac.uk/390201/1/Rogan_et_al-2016-Geophysical_Research_Letters.pdf https://eprints.soton.ac.uk/390201/2/Rogan_et_al-2016-Geophysical_Research_Letters.pdf en English eng https://eprints.soton.ac.uk/390201/1/Rogan_et_al-2016-Geophysical_Research_Letters.pdf https://eprints.soton.ac.uk/390201/2/Rogan_et_al-2016-Geophysical_Research_Letters.pdf Rogan, Nicholas, Achterberg, Eric P., Le Moigne, Frederic A.C., Marsay, Chris M., Tagliabue, Alessandro and Williams, Richard G. (2016) Volcanic ash as an oceanic iron source and sink. Geophysical Research Letters, 43 (6), 2732 -2740. (doi:10.1002/2016GL067905 <http://dx.doi.org/10.1002/2016GL067905>). Article PeerReviewed 2016 ftsouthampton https://doi.org/10.1002/2016GL067905 2023-07-09T22:05:28Z 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 modeling, 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 threefold 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 University of Southampton: e-Prints Soton Geophysical Research Letters 43 6 2732 2740 |
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Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
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 modeling, 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 threefold 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 |
publishDate |
2016 |
url |
https://eprints.soton.ac.uk/390201/ https://eprints.soton.ac.uk/390201/1/Rogan_et_al-2016-Geophysical_Research_Letters.pdf https://eprints.soton.ac.uk/390201/2/Rogan_et_al-2016-Geophysical_Research_Letters.pdf |
genre |
Eyjafjallajökull North Atlantic |
genre_facet |
Eyjafjallajökull North Atlantic |
op_relation |
https://eprints.soton.ac.uk/390201/1/Rogan_et_al-2016-Geophysical_Research_Letters.pdf https://eprints.soton.ac.uk/390201/2/Rogan_et_al-2016-Geophysical_Research_Letters.pdf Rogan, Nicholas, Achterberg, Eric P., Le Moigne, Frederic A.C., Marsay, Chris M., Tagliabue, Alessandro and Williams, Richard G. (2016) Volcanic ash as an oceanic iron source and sink. Geophysical Research Letters, 43 (6), 2732 -2740. (doi:10.1002/2016GL067905 <http://dx.doi.org/10.1002/2016GL067905>). |
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_ |
1772814367527534592 |