- Title
- The influence of Antarctic subglacial volcanism on the global iron cycle during the last glacial maximum
- Creator
- Frisia, Silvia; Weyrich, Laura S.; Cooper, Alan; Hellstrom, John; Borsato, Andrea; Golledge, Nicholas R.; Anesio, Alexandre M.; Bajo, Petra; Drysdale, Russell N.; Augustinus, Paul C.; Rivard, Camille
- Relation
- Nature Communications Vol. 8, no. 15425
- Publisher Link
- http://dx.doi.org/10.1038/ncomms15425
- Publisher
- Nature Publishing Group
- Resource Type
- journal article
- Date
- 2017
- Description
- Marine sediment records suggest that episodes of major atmospheric CO2 drawdown during the last glacial period were linked to iron (Fe) fertilization of subantarctic surface waters. The principal source of this Fe is thought to be dust transported from southern mid-latitude deserts. However, uncertainty exists over contributions to CO2 sequestration from complementary Fe sources, such as the Antarctic ice sheet, due to the difficulty of locating and interrogating suitable archives that have the potential to preserve such information. Here we present petrographic, geochemical and microbial DNA evidence preserved in precisely dated subglacial calcites from close to the East Antarctic Ice-Sheet margin, which together suggest that volcanically-induced drainage of Fe-rich waters during the Last Glacial Maximum could have reached the Southern Ocean. Our results support a significant contribution of Antarctic volcanism to subglacial transport and delivery of nutrients with implications on ocean productivity at peak glacial conditions.
- Subject
- subglacial volcanism; Antarctic; global iron cycle; last glacial maximum
- Identifier
- http://hdl.handle.net/1959.13/1348286
- Identifier
- uon:30180
- Identifier
- ISSN:2041-1723
- Rights
- This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
- Language
- eng
- Full Text
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