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Natural iron fertilization by the Eyjafjallajökull volcanic eruption

Natural iron fertilization by the Eyjafjallajökull volcanic eruption
Natural iron fertilization by the Eyjafjallajökull volcanic eruption
Aerosol deposition from the 2010 eruption of the Icelandic volcano Eyjafjallajökull resulted in significant dissolved iron (DFe) inputs to the Iceland Basin of the North Atlantic. Unique ship-board measurements indicated strongly enhanced DFe concentrations (up to 10?nM) immediately under the ash plume. Bioassay experiments performed with ash collected at sea under the plume also demonstrated the potential for associated Fe release to stimulate phytoplankton growth and nutrient drawdown. Combining Fe dissolution measurements with modeled ash deposition suggested that the eruption had the potential to increase DFe by >0.2?nM over an area of up to 570,000?km2. Although satellite ocean color data only indicated minor increases in phytoplankton abundance over a relatively constrained area, comparison of in situ nitrate concentrations with historical records suggested that ash deposition may have resulted in enhanced major nutrient drawdown. Our observations thus suggest that the 2010 Eyjafjallajökull eruption resulted in a significant perturbation to the biogeochemistry of the Iceland Basin.
iron fertilization, volcanic eruption, eyjafjallajökull volcano
0094-8276
921-926
Achterberg, Eric P.
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Moore, C. Mark
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Henson, Stephanie A.
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Steigenberger, Sebastian
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Stohl, Andreas
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Eckhardt, Sabine
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Avendano, Lizeth C.
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Cassidy, Michael
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Hembury, Debbie
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Klar, Jessica K.
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Lucas, Michael I.
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Macey, Anna I.
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Marsay, Chris
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Ryan-Keogh, Thomas J.
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Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Moore, C. Mark
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Henson, Stephanie A.
d6532e17-a65b-4d7b-9ee3-755ecb565c19
Steigenberger, Sebastian
15c989b8-dd0d-454c-b3cc-08d4290eaff0
Stohl, Andreas
79ab19bf-c1a8-4fa1-9e62-ed8c6b14baf8
Eckhardt, Sabine
e7091650-ff6f-4440-8c89-b517e585f9be
Avendano, Lizeth C.
dbd5abf1-b9c0-4ecd-882e-622635ddcf73
Cassidy, Michael
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Hembury, Debbie
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Klar, Jessica K.
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Lucas, Michael I.
585f2df8-3e7d-44f7-aee0-2a73324722ad
Macey, Anna I.
04c3fff6-93ca-437c-8280-a94cc10f7fed
Marsay, Chris
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Ryan-Keogh, Thomas J.
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Achterberg, Eric P., Moore, C. Mark, Henson, Stephanie A., Steigenberger, Sebastian, Stohl, Andreas, Eckhardt, Sabine, Avendano, Lizeth C., Cassidy, Michael, Hembury, Debbie, Klar, Jessica K., Lucas, Michael I., Macey, Anna I., Marsay, Chris and Ryan-Keogh, Thomas J. (2013) Natural iron fertilization by the Eyjafjallajökull volcanic eruption. Geophysical Research Letters, 40 (5), 921-926. (doi:10.1002/grl.50221).

Record type: Article

Abstract

Aerosol deposition from the 2010 eruption of the Icelandic volcano Eyjafjallajökull resulted in significant dissolved iron (DFe) inputs to the Iceland Basin of the North Atlantic. Unique ship-board measurements indicated strongly enhanced DFe concentrations (up to 10?nM) immediately under the ash plume. Bioassay experiments performed with ash collected at sea under the plume also demonstrated the potential for associated Fe release to stimulate phytoplankton growth and nutrient drawdown. Combining Fe dissolution measurements with modeled ash deposition suggested that the eruption had the potential to increase DFe by >0.2?nM over an area of up to 570,000?km2. Although satellite ocean color data only indicated minor increases in phytoplankton abundance over a relatively constrained area, comparison of in situ nitrate concentrations with historical records suggested that ash deposition may have resulted in enhanced major nutrient drawdown. Our observations thus suggest that the 2010 Eyjafjallajökull eruption resulted in a significant perturbation to the biogeochemistry of the Iceland Basin.

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e-pub ahead of print date: 14 March 2013
Published date: 16 March 2013
Keywords: iron fertilization, volcanic eruption, eyjafjallajökull volcano
Organisations: Marine Biogeochemistry, Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 350521
URI: https://eprints.soton.ac.uk/id/eprint/350521
ISSN: 0094-8276
PURE UUID: c8879e71-1d46-419f-87a9-7f527899bad7

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Date deposited: 27 Mar 2013 09:44
Last modified: 06 Aug 2019 18:51

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Contributors

Author: C. Mark Moore
Author: Sebastian Steigenberger
Author: Andreas Stohl
Author: Sabine Eckhardt
Author: Michael Cassidy
Author: Debbie Hembury
Author: Jessica K. Klar
Author: Michael I. Lucas
Author: Anna I. Macey
Author: Chris Marsay
Author: Thomas J. Ryan-Keogh

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