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dc.contributor.authorRoman, Matěj
dc.contributor.authorPíšková, Anna
dc.contributor.authorSanderson, David C.W.
dc.contributor.authorCresswell, Allan J.
dc.contributor.authorBulinova, Marie
dc.contributor.authorPokorný, Matěj
dc.contributor.authorKavan, Jan
dc.contributor.authorJennings, Stephen J.A.
dc.contributor.authorLirio, Juan M.
dc.contributor.authorNedbalová, Linda
dc.contributor.authorSacherová, Veronika
dc.contributor.authorKopalová, Kateřina
dc.contributor.authorGlasser, Neil F.
dc.contributor.authorNyvlt, Daniel
dc.date.accessioned2024-05-13T11:11:14Z
dc.date.available2024-05-13T11:11:14Z
dc.date.issued2024-05-09
dc.description.abstractLentic waterbodies provide terrestrial sedimentary archives of palaeoenvironmental change in deglaciated areas of the Antarctic. Knowledge of the long-term evolution of Antarctic palaeoenvironments affords important context to the current marked impacts of climate change in the Polar regions. Here, we present a comprehensively dated, multi-proxy sedimentary record from Monolith Lake, a distal proglacial lake in one of the largest ice-free areas of the Antarctic Peninsula region. Of the two defined sedimentary units in the cores studied, the lower Unit 1 exhibits a homogeneous composition and unvarying proxy data profiles, suggesting rapid clastic deposition under uniform, ice-proximal conditions with a sedimentation rate of ∼1 mm yr−1. 14C and optically stimulated luminescence (OSL) dating bracket the deposition interval to 1.5–2.5 ka BP, with the older age being more probable when compared to independent dating of the local deglaciation. The uppermost 11 cm of the record spans the last ∼2.2 ka BP (maximum age), suggesting a markedly decreased sedimentation rate of ∼0.05 mm yr−1 within Unit 2. Whereas Unit 1 shows only scarce evidence of biological activity, Unit 2 provides an uninterrupted record of diatoms (with 29 species recorded) and faunal subfossils, including the fairy shrimp Branchinecta gaini. Concentrations of organically-derived elements, as well as diatoms and faunal remains, are consistent, implying a gradual increase in lake productivity. These results provide an example of long-term Antarctic ‘greening’ (i.e. increasing organic productivity in terrestrial habitats) from a palaeolimnological perspective. The boundary between Units 1 and 2, therefore, marks the timing of local deglaciation at the final stages of a period of negative glacier mass balance, i.e. the Mid-Late Holocene Hypsithermal. Subsequent Neoglacial cooling is evidenced by the abated influence of glacial meltwater streams and turbidity decline linked to reduced glacier runoff, although most proxy responses mirror the natural proglacial lake ontogeny.en_US
dc.identifier.citationRoman, Píšková, Sanderson, Cresswell, Bulinova, Pokorný, Kavan, Jennings, Lirio, Nedbalová, Sacherová, Kopalová, Glasser, Nyvlt. The Late-Holocene deglaciation of James Ross Island, Antarctic Peninsula: OSL and 14C-dated multi-proxy sedimentary record from Monolith Lake. Quaternary Science Reviews. 2024;333en_US
dc.identifier.cristinIDFRIDAID 2267465
dc.identifier.doi10.1016/j.quascirev.2024.108693
dc.identifier.issn0277-3791
dc.identifier.issn1873-457X
dc.identifier.urihttps://hdl.handle.net/10037/33511
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalQuaternary Science Reviews
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2024 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.subjectAntarktis / Antarcticaen_US
dc.subjectDeglasiasjon / Deglaciationen_US
dc.subjectHolosen / Holoceneen_US
dc.subjectInnsjøsedimenter / Lake sedimentsen_US
dc.subjectKieselalger / Diatomsen_US
dc.subjectPaleolimnologi / Paleolimnologyen_US
dc.titleThe Late-Holocene deglaciation of James Ross Island, Antarctic Peninsula: OSL and 14C-dated multi-proxy sedimentary record from Monolith Lakeen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)