Show simple item record

dc.contributor.author
Tamburini, Federica
dc.contributor.author
Föllmi, Karl B.
dc.date.accessioned
2018-11-01T16:50:12Z
dc.date.available
2017-06-08T20:02:32Z
dc.date.available
2018-11-01T16:50:12Z
dc.date.issued
2008
dc.identifier.issn
1810-6277
dc.identifier.issn
1810-6285
dc.identifier.uri
http://hdl.handle.net/20.500.11850/10813
dc.identifier.doi
10.3929/ethz-b-000010813
dc.description.abstract
The role of nutrients and their impact on primary productivity and the fluctuations in atmospheric CO2 over glacial-interglacial periods are intensely debated. One of the cornerstones is the role of phosphorus (P; in the form of phosphate). Suggestions as to the importance of P evolved from an earlier proposal that P actively participated 5 in changing productivity rates and therefore climate change, to the most recent one that changes in the glacial ocean inventory of phosphorus were small and not influ- ential if compared to other macronutrients, such as nitrogen. Using new data coming from a selection of ODP sites, we illustrate oceanic P sedimentary phases distribu- tion and reactive P burial fluxes, and we show how P burial fluxes changed over the 10 last glacial-interglacial period. Concentrations of reactive P are generally lower dur- ing glacial times, while mass accumulation rates (MAR) show higher variability. On a global scale, glacial burial fluxes of reactive P are lower than those during interglacial periods by 7–10%, because lack of burial of reactive P on the glacial reduced shelf was apparently not compensated by burial in other regions of the ocean. Using the 15 calculated changes in P burial, we try to infer their possible impact on the phosphate inventory in the world oceans. Using a simple mathematical approach, we find that these changes alone could have increased the phosphate inventory of glacial ocean waters by 20–40% compared to interglacial stages. Variations in the C/P reactive ratios and in the P sedimentary phases distribution at the investigated sites seem to indicate 20 that at the onset of interglacial stages, shallower sites experienced an increase in re- active P concentrations. This seems to point to P-richer waters at glacial terminations, supporting the shelf-nutrient hypothesis and giving phosphorus a role as a potential player in climate change.
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Phosphorus burial in the ocean over glacial-interglacial time scales
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
Biogeosciences Discussions
ethz.journal.volume
5
en_US
ethz.journal.issue
6
en_US
ethz.journal.abbreviated
Biogeosci. discuss.
ethz.pages.start
5133
en_US
ethz.pages.end
5162
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03427 - Frossard, Emmanuel / Frossard, Emmanuel
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03427 - Frossard, Emmanuel / Frossard, Emmanuel
ethz.identifier.url
http://www.biogeosciences-discuss.net/5/5133/2008/bgd-5-5133-2008.pdf
ethz.relation.isPreviousVersionOf
10.3929/ethz-b-000019410
ethz.date.deposited
2017-06-08T20:02:37Z
ethz.source
ECIT
ethz.identifier.importid
imp59364bf7a46c756582
ethz.ecitpid
pub:21879
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-20T15:20:45Z
ethz.rosetta.lastUpdated
2018-11-01T16:50:57Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Phosphorus%20burial%20in%20the%20ocean%20over%20glacial-interglacial%20time%20scales&rft.jtitle=Biogeosciences%20Discussions&rft.date=2008&rft.volume=5&rft.issue=6&rft.spage=5133&rft.epage=5162&rft.issn=1810-6277&1810-6285&rft.au=Tamburini,%20Federica&F%C3%B6llmi,%20Karl%20B.&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record