Resolving sea ice dynamics in the north-western Ross Sea during the last 2.6 ka: From seasonal to millennial timescales

Tesi, Tommaso; Belt, Simon T.; Gariboldi, Karen; Muschitiello, Francesco; Smik, Lukas; Finocchiaro, Furio; Giglio, Federico; Colizza, Ester; Gazzurra, G.; Giordano, Patrizia; Morigi, Caterina; Capotondi, Lucilla; Nogarotto, Alessio; Köseoğlu, Denizcan; Roberto, Alessio Di; Gallerani, Andrea; Langone, Leonardo

doi:10.1016/j.quascirev.2020.106299

Cited by 29 publications

(66 citation statements)

References 76 publications

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“…1) mode using an Agilent 7890A series gas chromatograph (DB 5MS fused silica column; 50 m x 0.25 mm i.d., 0.25 μm film thickness) coupled to an Agilent 5975C mass spectrometric detector (Belt et al, 2012). HBIs were identified by comparison of retention indices (RI DB5-MS ) and mass spectra to those of authentic standards (Belt, 2018;Belt et al, 2000;Tesi et al, 2020;Tesi et al, 2017). Quantification of HBIs was carried out by comparing mass spectral intensities of molecular ions to that of the internal standard and normalizing for differences in mass spectral fragmentation efficiency and volume/mass sampled.…”

Section: Lipid Analysesmentioning

confidence: 99%

Efficiency of sympagic-benthic coupling revealed by analyses of n-3 fatty acids, IP25 and other highly branched isoprenoids in two filter-feeding Arctic benthic molluscs: Mya truncata and Serripes groenlandicus

Amiraux

Archambault

Moriceau

et al. 2021

Organic Geochemistry

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Section: Lipid Analysesmentioning

confidence: 99%

Efficiency of sympagic-benthic coupling revealed by analyses of n-3 fatty acids, IP25 and other highly branched isoprenoids in two filter-feeding Arctic benthic molluscs: Mya truncata and Serripes groenlandicus

Amiraux

Archambault

Moriceau

et al. 2021

Organic Geochemistry

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“…The recent discovery of the 1254 C.E. tephra at Edisto Inlet (Di Roberto et al, 2019;Tesi et al, 2020), deriving from Mt. Rittmann volcano, has allowed, for the first time in Antarctica, the unequivocal, independent time-stratigraphic correlation and synchronization between continental ice-archives and marine sediments.…”

Section: Introductionmentioning

confidence: 99%

Evidence for a large-magnitude Holocene eruption of Mount Rittmann (Antarctica): A volcanological reconstruction using the marine tephra record

Roberto

Albert

Colizza

et al. 2020

Quaternary Science Reviews

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In Antarctica, the near-source exposures of volcanic eruption deposits are often limited as they are not well preserved in the dynamic glacial environment, thus making volcanological reconstructions of explosive eruptions extremely challenging. Fortunately, pyroclastic deposits from explosive eruptions are preserved in Southern Ocean sediments surrounding Antarctica, and the tephrostratigraphy of these sequences offers crucial volcanological information including the timing and tempo of past eruptions, their magnitude, and eruption dynamics. Here we report the results of a tephrostratigraphy and tephrochronology study focused on four sediment cores recovered from the Wood Bay area in the western Ross Sea, Antarctica. In all these sedimentary sequences, we found a well-stratified primary tephra of considerable thickness, up to 80 cm, hereafter named the Aviator Tephra (AVT). According to the characteristics of the tephra deposit and its distribution, the AVT was associated with an eruption of considerable intensity, potentially representing one of the largest Holocene eruptions recorded in Antarctica. Based on the major and trace element geochemistry and the mineral assemblage of the tephra, Mount Rittmann was identified as the source of the AVT. A Holocene age of ~ 11 ka was determined by radiocarbon dating organic material within the sediments and 40 Ar-39 Ar dating of alkali-feldspar crystals included in the tephra. Eruption dynamics were initially dominated by hydromagmatic magma fragmentation conditions producing a sustained, relatively wet and ash-rich eruptive cloud. The eruption then evolved into a highly energetic, relatively dry magmatic Plinian eruption. The last phase was characterized by renewed efficient magma-water interaction and/or collapse of the eruptive column producing pyroclastic density currents and associated co-ignimbritic plumes. The distal tephra deposits might be linked to the widespread lag breccia layer previously identified on the rim of the Mount Rittmann caldera which share the same geochemical composition. Diatoms found in the sediments surrounding the AVT and the primary characteristics of the tephra indicate that the Wood Bay area was open sea at the time of the eruption, which is much earlier than previously thought. AVT is also an excellent tephrostratigraphic marker for the Wood Bay area, in the Ross Sea, and a useful marker for future synchronization of continental ice and marine archives in the region.

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“…The glass compositions of BC04 cryptotephra match those of the 1254 C.E. (or 1252 ± 2) tephra from Mount Rittmann widespread in the marine sediments from Cape Hallett [31,57] and in the ice records of the entire West Antarctica [58,[68][69][70][71]. BC04 38-39 cryptotephra compositions also match very well with the composition of 11.1 ± 1.4 ka Aviator tephra (AVT tephra) found in the marine sediments of the Aviator Basin ( [60], and again derived from the Mount Rittmann.…”

Section: Cryptotephra: Correlation With Volcanic Sourcementioning

confidence: 55%

“…Taking into consideration the different carbonate and organic carbon matrices, we decided to directly calibrate the carbonate dates and to treat AIOM dates prior to the calibration in 14 C ages. Radiocarbon chronologies using the AIOM fraction from bulk sediments are often compromised by contamination from the reworked old organic carbon derived from glacial erosion and/or from the reworking of unconsolidated sediments (see [30,31] for the discussion). This is evidenced by AIOM dates of Antarctic surface sediments that extend over several thousand years [32,33].…”

Section: Chronologymentioning

confidence: 99%

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

et al. 2021

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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.

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Resolving sea ice dynamics in the north-western Ross Sea during the last 2.6 ka: From seasonal to millennial timescales

Cited by 29 publications

References 76 publications

Efficiency of sympagic-benthic coupling revealed by analyses of n-3 fatty acids, IP25 and other highly branched isoprenoids in two filter-feeding Arctic benthic molluscs: Mya truncata and Serripes groenlandicus

Efficiency of sympagic-benthic coupling revealed by analyses of n-3 fatty acids, IP25 and other highly branched isoprenoids in two filter-feeding Arctic benthic molluscs: Mya truncata and Serripes groenlandicus

Evidence for a large-magnitude Holocene eruption of Mount Rittmann (Antarctica): A volcanological reconstruction using the marine tephra record

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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