Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges
Silicon is a keystone nutrient in the ocean for understanding climate change because of the importance of Southern Ocean diatoms in taking up CO2 from the surface ocean-atmosphere system and sequestering carbon into the deep sea. Here we report on silicon isotopes and germanium-to-silicon ratios in...
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ftpubman:oai:pure.mpg.de:item_2518095 2023-08-20T04:09:57+02:00 Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges Jochum, K. Schuessler, J. Wang, X. Stoll, B. Weis, U. Müller, W. Haug, G. Andreae, M. Froelich, P. 2017 http://hdl.handle.net/11858/00-001M-0000-002E-97C4-D eng eng info:eu-repo/semantics/altIdentifier/doi/10.1002/2017GL073897 http://hdl.handle.net/11858/00-001M-0000-002E-97C4-D Geophysical Research Letters info:eu-repo/semantics/article 2017 ftpubman https://doi.org/10.1002/2017GL073897 2023-08-01T21:19:24Z Silicon is a keystone nutrient in the ocean for understanding climate change because of the importance of Southern Ocean diatoms in taking up CO2 from the surface ocean-atmosphere system and sequestering carbon into the deep sea. Here we report on silicon isotopes and germanium-to-silicon ratios in giant glass spicules of deep-sea sponge Monorhaphis chuni over the past 17,000 years. In situ measurements of Si isotopes and Ge concentrations show systematic variations from rim to center of the cross sections. When calibrated against seawater concentrations using data from modern spicule rims, sponge data indicate that dissolved silica concentrations in the deep Pacific were ~12% higher during the early deglacial. These deep Pacific Ocean data help to fill an important global gap in paleo-nutrient records. Either continental sources supplied more silica to the deglacial ocean and/or biogenic silica burial was lower, both of which may have affected atmospheric CO2. Article in Journal/Newspaper Southern Ocean Glass sponges Max Planck Society: MPG.PuRe Pacific Southern Ocean Geophysical Research Letters 44 22 11,555 11,564 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
Silicon is a keystone nutrient in the ocean for understanding climate change because of the importance of Southern Ocean diatoms in taking up CO2 from the surface ocean-atmosphere system and sequestering carbon into the deep sea. Here we report on silicon isotopes and germanium-to-silicon ratios in giant glass spicules of deep-sea sponge Monorhaphis chuni over the past 17,000 years. In situ measurements of Si isotopes and Ge concentrations show systematic variations from rim to center of the cross sections. When calibrated against seawater concentrations using data from modern spicule rims, sponge data indicate that dissolved silica concentrations in the deep Pacific were ~12% higher during the early deglacial. These deep Pacific Ocean data help to fill an important global gap in paleo-nutrient records. Either continental sources supplied more silica to the deglacial ocean and/or biogenic silica burial was lower, both of which may have affected atmospheric CO2. |
format |
Article in Journal/Newspaper |
author |
Jochum, K. Schuessler, J. Wang, X. Stoll, B. Weis, U. Müller, W. Haug, G. Andreae, M. Froelich, P. |
spellingShingle |
Jochum, K. Schuessler, J. Wang, X. Stoll, B. Weis, U. Müller, W. Haug, G. Andreae, M. Froelich, P. Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges |
author_facet |
Jochum, K. Schuessler, J. Wang, X. Stoll, B. Weis, U. Müller, W. Haug, G. Andreae, M. Froelich, P. |
author_sort |
Jochum, K. |
title |
Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges |
title_short |
Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges |
title_full |
Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges |
title_fullStr |
Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges |
title_full_unstemmed |
Whole-Ocean Changes in Silica and Ge/Si Ratios During the Last Deglacial Deduced From Long-Lived Giant Glass Sponges |
title_sort |
whole-ocean changes in silica and ge/si ratios during the last deglacial deduced from long-lived giant glass sponges |
publishDate |
2017 |
url |
http://hdl.handle.net/11858/00-001M-0000-002E-97C4-D |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean Glass sponges |
genre_facet |
Southern Ocean Glass sponges |
op_source |
Geophysical Research Letters |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017GL073897 http://hdl.handle.net/11858/00-001M-0000-002E-97C4-D |
op_doi |
https://doi.org/10.1002/2017GL073897 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
22 |
container_start_page |
11,555 |
op_container_end_page |
11,564 |
_version_ |
1774723735235854336 |