Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8195
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dc.contributor.authorallPatara, L.; CMCCen
dc.contributor.authorallVichi, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallMasina, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.date.accessioned2012-10-15T06:14:41Zen
dc.date.available2012-10-15T06:14:41Zen
dc.date.issued2012en
dc.identifier.urihttp://hdl.handle.net/2122/8195en
dc.description.abstractThe impacts of natural atmospheric variability and anthropogenic climate change on the spatial distribution, seasonality, structure, and productivity of North Pacific plankton groups are investigated by means of an Earth System Model (ESM) that contains a plankton model with variable stoichiometry. The ESM is forced with observed greenhouse gases for the 20th century and with the Intergovernmental Panel on Climate Change A1B Emission Scenario for the 21st century. The impacts of the two main modes of variability – connected with the Aleutian Low (AL) strength and with the North Pacific Oscillation (NPO) – are considered. When the AL is strong, primary productivity and chlorophyll concentrations are higher in the central Pacific, the seasonality of plankton is enhanced, and the classical grazing chain is stimulated, whereas in the Alaskan Gyre the model simulates a chlorophyll decrease and a shift toward smaller phytoplankton species. A stronger NPO increases productivity and chlorophyll concentration at ∼45°N. In the anthropogenic climate change scenario, simulated sea surface temperature is 4 °C higher with respect to contemporary conditions, leading to reduced mixing and nutrient supply at middle-subpolar latitudes. The seasonal phytoplankton bloom is reduced and occurs one month earlier, the flow of carbon to the microbial loop is enhanced, and phytoplanktonic stoichiometry is nutrient-depleted. Primary productivity is enhanced at subpolar latitudes, due to increased ice-free regions and possibly to temperature-related photosynthesis stimulation. This study highlights that natural climate variability may act alternatively to strengthen or to weaken the human-induced impacts, and that in the next decades it will be difficult to distinguish between internal and external climate forcing on North Pacific plankton groups.en
dc.language.isoEnglishen
dc.publisher.nameElsevier Science Limiteden
dc.relation.ispartofEcological modellingen
dc.relation.ispartofseries10/244(2012)en
dc.subjectPlankton model; Biogeochemistry; Physiological stoichiometry; Natural climate variability; Climate change; North Pacific; Earth System Modelen
dc.titleImpacts of natural and anthropogenic climate variations on North Pacific plankton in an Earth System Modelen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber132-147en
dc.subject.INGV03. Hydrosphere::03.01. General::03.01.01. Analytical and numerical modelingen
dc.subject.INGV03. Hydrosphere::03.01. General::03.01.03. Global climate modelsen
dc.subject.INGV03. Hydrosphere::03.01. General::03.01.07. Physical and biogeochemical interactionsen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.01. Biogeochemical cyclesen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.02. Carbon cyclingen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.04. Ecosystemsen
dc.identifier.doi10.1016/j.ecolmodel.2012.06.012,en
dc.description.obiettivoSpecifico3.7. Dinamica del clima e dell'oceanoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0304-3800en
dc.relation.eissn1872-7026en
dc.contributor.authorPatara, L.en
dc.contributor.authorVichi, M.en
dc.contributor.authorMasina, S.en
dc.contributor.departmentCMCCen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptCMCC-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.orcid0000-0001-6273-7065-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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