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Article

Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum

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Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria 53, 56126 Pisa, Italy
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Dipartimento di Matematica e Geoscienze, Università di Trieste, Via E. Weiss 2, 34128 Trieste, Italy
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Dipartimento di Scienze dell’Ambiente e della Terra, Università di Milano-Bicocca, Piazza della Scienza 4, 20126 Milano, Italy
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Istituto di Scienze Marine-Consiglio Nazionale delle Ricerche ISMAR-CNR, Via P. Gobetti 101, 40129 Bologna, Italy
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Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Via C. Battisti 53, 56125 Pisa, Italy
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Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany
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Department of Oceanography, Pusan National University, Busan 46241, Korea
*
Authors to whom correspondence should be addressed.
Academic Editors: Jesus Martinez-Frias and Angelos G. Maravelis
Geosciences 2021, 11(4), 155; https://doi.org/10.3390/geosciences11040155
Received: 26 February 2021 / Revised: 22 March 2021 / Accepted: 26 March 2021 / Published: 31 March 2021
(This article belongs to the Section Sedimentology, Stratigraphy and Palaeontology)
The continental margin is a key area for studying the sedimentary processes related to the advance and retreat of the Ross Ice Shelf (Antarctica); nevertheless, much remains to be investigated. The aim of this study is to increase the knowledge of the last glacial/deglacial dynamics in the Central Basin slope–basin system using a multidisciplinary approach, including integrated sedimentological, micropaleontological and tephrochronological information. The analyses carried out on three box cores highlighted sedimentary sequences characterised by tree stratigraphic units. Collected sediments represent a time interval from 24 ka Before Present (BP) to the present time. Grain size clustering and data on the sortable silt component, together with diatom, silicoflagellate and foraminifera assemblages indicate the influence of the ice shelf calving zone (Unit 1, 24–17 ka BP), progressive receding due to Circumpolar Deep Water inflow (Unit 2, 17–10.2 ka BP) and (Unit 3, 10.2 ka BP–present) the establishment of seasonal sea ice with a strengthening of bottom currents. The dominant and persistent process is a sedimentation controlled by contour currents, which tend to modulate intensity in time and space. A primary volcanic ash layer dated back at around 22 ka BP is correlated with the explosive activity of Mount Rittmann. View Full-Text
Keywords: diatoms; micropaleontology; sedimentology; cryptotephra; LGM to Holocene; Central Basin; Western Ross Sea; Antarctica diatoms; micropaleontology; sedimentology; cryptotephra; LGM to Holocene; Central Basin; Western Ross Sea; Antarctica
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MDPI and ACS Style

Torricella, F.; Melis, R.; Malinverno, E.; Fontolan, G.; Bussi, M.; Capotondi, L.; Del Carlo, P.; Di Roberto, A.; Geniram, A.; Kuhn, G.; Khim, B.-K.; Morigi, C.; Scateni, B.; Colizza, E. Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum. Geosciences 2021, 11, 155. https://doi.org/10.3390/geosciences11040155

AMA Style

Torricella F, Melis R, Malinverno E, Fontolan G, Bussi M, Capotondi L, Del Carlo P, Di Roberto A, Geniram A, Kuhn G, Khim B-K, Morigi C, Scateni B, Colizza E. Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum. Geosciences. 2021; 11(4):155. https://doi.org/10.3390/geosciences11040155

Chicago/Turabian Style

Torricella, Fiorenza; Melis, Romana; Malinverno, Elisa; Fontolan, Giorgio; Bussi, Mauro; Capotondi, Lucilla; Del Carlo, Paola; Di Roberto, Alessio; Geniram, Andrea; Kuhn, Gerhard; Khim, Boo-Keun; Morigi, Caterina; Scateni, Bianca; Colizza, Ester. 2021. "Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum" Geosciences 11, no. 4: 155. https://doi.org/10.3390/geosciences11040155

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