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dc.contributor.authorJoo, Young Ji
dc.contributor.authorForwick, Matthias
dc.contributor.authorPark, Kwangkyu
dc.contributor.authorJoe, Youngjin
dc.contributor.authorSon, Yeong Ju
dc.contributor.authorNam, Seung-Il
dc.date.accessioned2020-01-16T07:21:48Z
dc.date.available2020-01-16T07:21:48Z
dc.date.issued2019-09-26
dc.description.abstractMulti-proxy analyses of two sediment cores from Dicksonfjorden were performed to reconstruct Holocene environmental conditions in this northern branch of Isfjorden, the largest fjord system in Svalbard. Factors affecting the depositional processes include shifts in sources of sediments, ice rafting and regional glacio-isostatic rebound. Sediments were derived from Palaeozoic siliciclastics and carbonates occurring at the fjord head and sides, respectively. Their relative contributions were controlled by falling relative sea level and the resulting progradation of the major stream and delta systems closer to the core sites. Deposition of clasts from sea-ice rafting persisted throughout most of the Holocene. Following a period of low, but continuous, clast fluxes (ca. 11 000–7000 calibrated years before the present), ice rafting was most intensive between ca. 7000 and 3000 calibrated years before the present. It can be related to extensive seasonal sea-ice formation caused by regional cooling. The prograding deltas also provided coarse sediments. Reduced ice rafting from ca. 3000 calibrated years before the present suggests enhanced formation of shorefast and/or permanent sea ice, suppressing sea-ice rafting in the fjord, in response to the cool climate and reduced heat flux from Atlantic Water. Episodic inflow of Atlantic Water and low turbidity of surface water can, however, account for a larger amount of marine organic matter produced in the outer fjord. The sedimentary record in Dicksonfjorden, where tidewater glaciers are absent, reflects similar climate and oceanographic variations as reconstructed in fjords on western Spitsbergen that are influenced by tidewater glaciers.en_US
dc.identifier.citationJoo, Forwick M, Park, Joe, Son, Nam S. Holocene environmental changes in Dicksonfjorden, west Spitsbergen, Svalbard. Polar Research. 2019;38en_US
dc.identifier.cristinIDFRIDAID 1773260
dc.identifier.doi10.33265/polar.v38.3426
dc.identifier.issn0800-0395
dc.identifier.issn1751-8369
dc.identifier.urihttps://hdl.handle.net/10037/17111
dc.language.isoengen_US
dc.publisherNorsk Polarinstitutten_US
dc.relation.journalPolar Research
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleHolocene environmental changes in Dicksonfjorden, west Spitsbergen, Svalbarden_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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