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dc.contributor.author
Le Quéré, Corinne
dc.contributor.author
Buitenhuis, Erik T.
dc.contributor.author
Moriarty, Róisín
dc.contributor.author
Alvain, Séverine
dc.contributor.author
Aumont, Olivier
dc.contributor.author
Bopp, Laurent
dc.contributor.author
Chollet, Sophie
dc.contributor.author
Enright, Clare
dc.contributor.author
Franklin, Daniel J.
dc.contributor.author
Geider, Richard J.
dc.contributor.author
Geider, Richard J.
dc.contributor.author
Hirst, Andrew G.
dc.contributor.author
Larsen, Stuart
dc.contributor.author
Legendre, Louis
dc.contributor.author
Platt, Trevor
dc.contributor.author
Prentice, I. Colin
dc.contributor.author
Rivkin, Richard B.
dc.contributor.author
Sailley, Sévrine
dc.contributor.author
Sathyendranath, Shubha
dc.contributor.author
Stephens, Nick
dc.contributor.author
Vogt, Meike
dc.contributor.author
Vallina, Sergio M.
dc.date.accessioned
2018-11-01T14:51:22Z
dc.date.available
2017-06-11T21:47:43Z
dc.date.available
2018-11-01T14:51:22Z
dc.date.issued
2015
dc.identifier.issn
1810-6277
dc.identifier.issn
1810-6285
dc.identifier.other
10.5194/bgd-12-11935-2015
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/108200
dc.identifier.doi
10.3929/ethz-b-000108200
dc.description.abstract
Global ocean biogeochemistry models currently employed in climate change projections use highly simplified representations of pelagic food webs. These food webs do not necessarily include critical pathways by which ecosystems interact with ocean biogeochemistry and climate. Here we present a global biogeochemical model which incorporates ecosystem dynamics based on the representation of ten plankton functional types (PFTs): six types of phytoplankton, three types of zooplankton, and heterotrophic procaryotes. We improved the representation of zooplankton dynamics in our model through (a) the explicit inclusion of large, slow-growing macrozooplankton (e.g. krill), and (b) the introduction of trophic cascades among the three zooplankton types. We use the model to quantitatively assess the relative roles of iron vs. grazing in determining phytoplankton biomass in the Southern Ocean high-nutrient low-chlorophyll (HNLC) region during summer. When model simulations do not include macrozooplankton grazing explicitly, they systematically overestimate Southern Ocean chlorophyll biomass during the summer, even when there is no iron deposition from dust. When model simulations include a slow-growing macrozooplankton and trophic cascades among three zooplankton types, the high-chlorophyll summer bias in the Southern Ocean HNLC region largely disappears. Our model results suggest that the observed low phytoplankton biomass in the Southern Ocean during summer is primarily explained by the dynamics of the Southern Ocean zooplankton community, despite iron limitation of phytoplankton community growth rates. This result has implications for the representation of global biogeochemical cycles in models as zooplankton faecal pellets sink rapidly and partly control the carbon export to the intermediate and deep ocean
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
Role of zooplankton dynamics for Southern Ocean phytoplankton biomass and global biogeochemical cycles
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
Biogeosciences Discussions
ethz.journal.volume
12
en_US
ethz.journal.issue
14
en_US
ethz.journal.abbreviated
Biogeosci. discuss.
ethz.pages.start
11935
en_US
ethz.pages.end
11985
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.nebis
010153508
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::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03731 - Gruber, Nicolas / Gruber, Nicolas
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03731 - Gruber, Nicolas / Gruber, Nicolas
ethz.relation.isPreviousVersionOf
10.5194/bgd-12-11935-2015
ethz.date.deposited
2017-06-11T21:47:54Z
ethz.source
ECIT
ethz.identifier.importid
imp593653ca4139f95236
ethz.ecitpid
pub:168994
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T18:33:28Z
ethz.rosetta.lastUpdated
2018-11-01T14:52:21Z
ethz.rosetta.versionExported
true
ethz.COinS
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