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@article{2418722,
author = {Roman, Matěj and Píšková, Anna and Sanderson, David C.W. and Cresswell, Alan J and Bulínová, Marie and Pokorný, Matěj and Kavan, Jan and Jennings, Stephen James Arthur and Lirio, Juan M. and Nedbalová, Linda and Sacherová, Veronika and Kopalová, Kateřina and Glasser, Neil F. and Nývlt, Daniel},
article_number = {June 2024},
doi = {http://dx.doi.org/10.1016/j.quascirev.2024.108693},
keywords = {Antarctica; Palaeolimnology; Lake sediments; Radiocarbon; OSL dating; Deglaciation; Diatoms; Faunal subfossils; Holocene; Neoglacial},
language = {eng},
issn = {0277-3791},
journal = {Quaternary Science Reviews},
title = {The Late Holocene deglaciation of James Ross Island, Antarctic Peninsula: OSL and 14C-dated multi-proxy sedimentary record from Monolith Lake},
url = {https://www.sciencedirect.com/science/article/pii/S027737912400194X?via%3Dihub},
volume = {333},
year = {2024}
}
TY - JOUR
ID - 2418722
AU - Roman, Matěj - Píšková, Anna - Sanderson, David C.W. - Cresswell, Alan J - Bulínová, Marie - Pokorný, Matěj - Kavan, Jan - Jennings, Stephen James Arthur - Lirio, Juan M. - Nedbalová, Linda - Sacherová, Veronika - Kopalová, Kateřina - Glasser, Neil F. - Nývlt, Daniel
PY - 2024
TI - The Late Holocene deglaciation of James Ross Island, Antarctic Peninsula: OSL and 14C-dated multi-proxy sedimentary record from Monolith Lake
JF - Quaternary Science Reviews
VL - 333
IS - June 2024
SP - 1-17
EP - 1-17
PB - Elsevier Ltd
SN - 02773791
KW - Antarctica
KW - Palaeolimnology
KW - Lake sediments
KW - Radiocarbon
KW - OSL dating
KW - Deglaciation
KW - Diatoms
KW - Faunal subfossils
KW - Holocene
KW - Neoglacial
UR - https://www.sciencedirect.com/science/article/pii/S027737912400194X?via%3Dihub
N2 - Lentic 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.
ER -
ROMAN, Matěj, Anna PÍŠKOVÁ, David C.W. SANDERSON, Alan J CRESSWELL, Marie BULÍNOVÁ, Matěj POKORNÝ, Jan KAVAN, Stephen James Arthur JENNINGS, Juan M. LIRIO, Linda NEDBALOVÁ, Veronika SACHEROVÁ, Kateřina KOPALOVÁ, Neil F. GLASSER a Daniel NÝVLT. The Late Holocene deglaciation of James Ross Island, Antarctic Peninsula: OSL and 14C-dated multi-proxy sedimentary record from Monolith Lake. \textit{Quaternary Science Reviews}. Elsevier Ltd, 2024, roč.~333, June 2024, s.~1-17. ISSN~0277-3791. Dostupné z: https://dx.doi.org/10.1016/j.quascirev.2024.108693.
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