Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron
low-chlorophyll (HNLC) subarctic North Pacific Ocean, a region that is thought to be iron-limited. Here we provide evidence supporting the hypothesis that Ocean Station Papa (OSP) in the subarctic Pacific received a lateral supply of particulate iron from the continental margin off the Aleutian Isla...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.504.7192 2023-05-15T18:28:05+02:00 Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron Glenn A. Waychunas Inez Y. Fung The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.504.7192 http://xraysweb.lbl.gov/uxas/Publicatons/Papers/pdfs/2005GB002557-Final.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.504.7192 http://xraysweb.lbl.gov/uxas/Publicatons/Papers/pdfs/2005GB002557-Final.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://xraysweb.lbl.gov/uxas/Publicatons/Papers/pdfs/2005GB002557-Final.pdf cycling of iron in the oceans [Lefevre and Watson 1999 text ftciteseerx 2016-01-08T09:19:01Z low-chlorophyll (HNLC) subarctic North Pacific Ocean, a region that is thought to be iron-limited. Here we provide evidence supporting the hypothesis that Ocean Station Papa (OSP) in the subarctic Pacific received a lateral supply of particulate iron from the continental margin off the Aleutian Islands in the winter, coincident with the observed biological bloom. Synchrotron X-ray analysis was used to describe the physical form, chemistry, and depth distributions of iron in size fractionated particulate matter samples. The analysis reveals that discrete micron-sized iron-rich hot spots are ubiquitous in the upper 200 m at OSP, more than 900 km from the closest coast. The specifics of the chemistry and depth profiles of the Fe hot spots trace them to the continental margins. We thus hypothesize that iron hot spots are a marker for the delivery of iron from the continental margin. We confirm the delivery of continental margin iron to the open ocean using an ocean general circulation model with an iron-like tracer source at the continental margin. We suggest that iron from the continental margin stimulated a wintertime phytoplankton bloom, partially relieving the HNLC condition. Text Subarctic Aleutian Islands Unknown Pacific |
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ftciteseerx |
language |
English |
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cycling of iron in the oceans [Lefevre and Watson 1999 |
spellingShingle |
cycling of iron in the oceans [Lefevre and Watson 1999 Glenn A. Waychunas Inez Y. Fung Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron |
topic_facet |
cycling of iron in the oceans [Lefevre and Watson 1999 |
description |
low-chlorophyll (HNLC) subarctic North Pacific Ocean, a region that is thought to be iron-limited. Here we provide evidence supporting the hypothesis that Ocean Station Papa (OSP) in the subarctic Pacific received a lateral supply of particulate iron from the continental margin off the Aleutian Islands in the winter, coincident with the observed biological bloom. Synchrotron X-ray analysis was used to describe the physical form, chemistry, and depth distributions of iron in size fractionated particulate matter samples. The analysis reveals that discrete micron-sized iron-rich hot spots are ubiquitous in the upper 200 m at OSP, more than 900 km from the closest coast. The specifics of the chemistry and depth profiles of the Fe hot spots trace them to the continental margins. We thus hypothesize that iron hot spots are a marker for the delivery of iron from the continental margin. We confirm the delivery of continental margin iron to the open ocean using an ocean general circulation model with an iron-like tracer source at the continental margin. We suggest that iron from the continental margin stimulated a wintertime phytoplankton bloom, partially relieving the HNLC condition. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Glenn A. Waychunas Inez Y. Fung |
author_facet |
Glenn A. Waychunas Inez Y. Fung |
author_sort |
Glenn A. Waychunas |
title |
Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron |
title_short |
Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron |
title_full |
Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron |
title_fullStr |
Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron |
title_full_unstemmed |
Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron |
title_sort |
wintertime phytoplankton bloom in the subarctic pacific supported by continental margin iron |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.504.7192 http://xraysweb.lbl.gov/uxas/Publicatons/Papers/pdfs/2005GB002557-Final.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic Aleutian Islands |
genre_facet |
Subarctic Aleutian Islands |
op_source |
http://xraysweb.lbl.gov/uxas/Publicatons/Papers/pdfs/2005GB002557-Final.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.504.7192 http://xraysweb.lbl.gov/uxas/Publicatons/Papers/pdfs/2005GB002557-Final.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766210420374241280 |