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dc.contributor.authorZehnich, Marc
dc.contributor.authorSpielhagen, Robert F.
dc.contributor.authorBauch, Henning A.
dc.contributor.authorForwick, Matthias
dc.contributor.authorHass, Christian
dc.contributor.authorPalme, Tina
dc.contributor.authorStein, Ruediger
dc.contributor.authorSyring, Nicole
dc.date.accessioned2021-02-11T22:42:17Z
dc.date.available2021-02-11T22:42:17Z
dc.date.issued2020-08-13
dc.description.abstractTo reconstruct the climatic and paleoceanographic variability offshore Northeast Greenland during the last ~10 ka with multidecadal resolution, sediment core PS93/025 from the outermost North-East Greenland continental shelf (80.5°N) was studied by a variety of micropaleontological, sedimentological and isotopic methods. High foraminiferal fluxes, together with high proportions of ice-rafted debris and high Ca/Fe ratios, indicate a maximum in bioproductivity until ~8 ka related to a low sea-ice coverage. Sortable silt values, planktic foraminifer associations, and stable isotope data of planktic and benthic foraminifers suggest a strong westward advection of relatively warm Atlantic Water by the Return Atlantic Current during this time, with a noticeable bottom current activity. This advection may have been facilitated by a greater water depth at our site, resulting from postglacial isostatic depression. For the following mid-Holocene interval (ca. 8–5 ka), isotope data, lower foraminiferal fluxes and a shift in grain size maxima point to a lasting but successively decreasing Atlantic Water inflow, a weakening productivity, and a growing sea-ice coverage which is also revealed by the P<sub>III</sub>IP<sub>25</sub> index. A final stage in the environmental development was reached at ~5 ka with the establishment of pre-industrial conditions. Low Ca/Fe ratios, low foraminiferal fluxes, low sortable silt values and the sea-ice indicating P<sub>III</sub>IP<sub>25</sub> index point to a limited productivity and a weak Atlantic Water inflow by the Return Atlantic Current to our research area, as well as a higher and/or seasonally more extended sea-ice coverage during the Late Holocene. Two intervals with somewhat enhanced Atlantic Water advection around 2.0 and 1.0 ka are indicated by slightly increased foraminiferal fluxes and the reoccurrence of subpolar foraminifers. These intervals may correlate with the Roman Warm Period and the Medieval Climate Anomaly, as defined in the North Atlantic region.en_US
dc.identifier.citationZehnich, Spielhagen RF, Bauch HA, Forwick M, Hass C, Palme, Stein R, Syring. Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years. The Holocene. 2020;30(12):1752-1766en_US
dc.identifier.cristinIDFRIDAID 1871785
dc.identifier.doi10.1177/0959683620950393
dc.identifier.issn0959-6836
dc.identifier.issn1477-0911
dc.identifier.urihttps://hdl.handle.net/10037/20568
dc.language.isoengen_US
dc.publisherSageen_US
dc.relation.journalThe Holocene
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452en_US
dc.titleEnvironmental variability off NE Greenland (western Fram Strait) during the past 10,600 yearsen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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