Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific
Using multiple lines of evidence, we demonstrate that volcanic ash deposition in August 2008 initiated one of the largest phytoplankton blooms observed in the subarctic North Pacific. Unusually widespread transport from a volcanic eruption in the Aleutian Islands, Alaska deposited ash over much of t...
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ftplymouthml:oai:plymsea.ac.uk:5752 2023-05-15T18:27:59+02:00 Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific Hamme, RC Webley, PW Crawford, WR Whitney, FA DeGrandpre, MD Emerson, SR Eriksen, CC Giesbrecht, KE Gower, JFR Kavanaugh, MT Pena, M Sabine, CL Batten, SD Coogan, LA Grundle, DS Lockwood, D 2010 http://plymsea.ac.uk/id/eprint/5752/ unknown Hamme, RC; Webley, PW; Crawford, WR; Whitney, FA; DeGrandpre, MD; Emerson, SR; Eriksen, CC; Giesbrecht, KE; Gower, JFR; Kavanaugh, MT; Pena, M; Sabine, CL; Batten, SD; Coogan, LA; Grundle, DS; Lockwood, D. 2010 Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific. Geophysical Research Letters, 37 (19). L19604. Publication - Article NonPeerReviewed 2010 ftplymouthml 2022-09-13T05:48:23Z Using multiple lines of evidence, we demonstrate that volcanic ash deposition in August 2008 initiated one of the largest phytoplankton blooms observed in the subarctic North Pacific. Unusually widespread transport from a volcanic eruption in the Aleutian Islands, Alaska deposited ash over much of the subarctic NE Pacific, followed by large increases in satellite chlorophyll. Surface ocean pCO2, pH, and fluorescence reveal that the bloom started a few days after ashfall. Ship-based measurements showed increased dominance by diatoms. This evidence points toward fertilization of this normally iron-limited region by ash, a relatively new mechanism proposed for iron supply to the ocean. The observations do not support other possible mechanisms. Extrapolation of the pCO2 data to the area of the bloom suggests a modest ∼0.01 Pg carbon export from this event, implying that even large-scale iron fertilization at an optimum time of year is not very efficient at sequestering atmospheric CO2. Article in Journal/Newspaper Subarctic Alaska Aleutian Islands Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) Pacific |
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Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) |
op_collection_id |
ftplymouthml |
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unknown |
description |
Using multiple lines of evidence, we demonstrate that volcanic ash deposition in August 2008 initiated one of the largest phytoplankton blooms observed in the subarctic North Pacific. Unusually widespread transport from a volcanic eruption in the Aleutian Islands, Alaska deposited ash over much of the subarctic NE Pacific, followed by large increases in satellite chlorophyll. Surface ocean pCO2, pH, and fluorescence reveal that the bloom started a few days after ashfall. Ship-based measurements showed increased dominance by diatoms. This evidence points toward fertilization of this normally iron-limited region by ash, a relatively new mechanism proposed for iron supply to the ocean. The observations do not support other possible mechanisms. Extrapolation of the pCO2 data to the area of the bloom suggests a modest ∼0.01 Pg carbon export from this event, implying that even large-scale iron fertilization at an optimum time of year is not very efficient at sequestering atmospheric CO2. |
format |
Article in Journal/Newspaper |
author |
Hamme, RC Webley, PW Crawford, WR Whitney, FA DeGrandpre, MD Emerson, SR Eriksen, CC Giesbrecht, KE Gower, JFR Kavanaugh, MT Pena, M Sabine, CL Batten, SD Coogan, LA Grundle, DS Lockwood, D |
spellingShingle |
Hamme, RC Webley, PW Crawford, WR Whitney, FA DeGrandpre, MD Emerson, SR Eriksen, CC Giesbrecht, KE Gower, JFR Kavanaugh, MT Pena, M Sabine, CL Batten, SD Coogan, LA Grundle, DS Lockwood, D Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific |
author_facet |
Hamme, RC Webley, PW Crawford, WR Whitney, FA DeGrandpre, MD Emerson, SR Eriksen, CC Giesbrecht, KE Gower, JFR Kavanaugh, MT Pena, M Sabine, CL Batten, SD Coogan, LA Grundle, DS Lockwood, D |
author_sort |
Hamme, RC |
title |
Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific |
title_short |
Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific |
title_full |
Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific |
title_fullStr |
Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific |
title_full_unstemmed |
Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific |
title_sort |
volcanic ash fuels anomalous plankton bloom in subarctic northeast pacific |
publishDate |
2010 |
url |
http://plymsea.ac.uk/id/eprint/5752/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic Alaska Aleutian Islands |
genre_facet |
Subarctic Alaska Aleutian Islands |
op_relation |
Hamme, RC; Webley, PW; Crawford, WR; Whitney, FA; DeGrandpre, MD; Emerson, SR; Eriksen, CC; Giesbrecht, KE; Gower, JFR; Kavanaugh, MT; Pena, M; Sabine, CL; Batten, SD; Coogan, LA; Grundle, DS; Lockwood, D. 2010 Volcanic ash fuels anomalous plankton bloom in subarctic northeast Pacific. Geophysical Research Letters, 37 (19). L19604. |
_version_ |
1766210271097913344 |