Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica)
Reconstruction of past changes to sea ice extent is central to understanding the factors that control its distribution and informs how changes in sea ice might occur in the future. Such reconstructions are often hindered, however, by poor age control (or resolution) in marine archives, or the absenc...
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ftunivpisairis:oai:arpi.unipi.it:11568/947698 2024-04-14T08:02:50+00:00 Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) Tommaso Tesi Leonardo Langone Simon Belt Lukas Smik Caterina Morigi Karen Gariboldi Antonella Gandolfi Ester Colizza Federico Giglio Patrizia Giordano Furio Finocchiaro Lucilla Capotondi Andrea Gallerani Tesi, Tommaso Langone, Leonardo Belt, Simon Smik, Luka Morigi, Caterina Gariboldi, Karen Gandolfi, Antonella Colizza, Ester Giglio, Federico Giordano, Patrizia Finocchiaro, Furio Capotondi, Lucilla Gallerani, Andrea 2018 ELETTRONICO http://hdl.handle.net/11568/947698 eng eng country:CHE place:Davos, Switzerland info:eu-repo/semantics/altIdentifier/isbn/978-0-948277-54-2 ispartofbook:POLAR2018-Where the Poles come together. Abstract Proceedings Open Science Conference. POLAR2018-Where the Poles come together. firstpage:1701 lastpage:1701 numberofpages:1 http://hdl.handle.net/11568/947698 info:eu-repo/semantics/conferenceObject 2018 ftunivpisairis 2024-03-21T19:07:21Z Reconstruction of past changes to sea ice extent is central to understanding the factors that control its distribution and informs how changes in sea ice might occur in the future. Such reconstructions are often hindered, however, by poor age control (or resolution) in marine archives, or the absence of robust proxy signatures. Here, we show preliminary results from a 14.6 m long piston-core collected in the Edisto inlet (Cape Hallett, Ross Sea, Antarctica). The aim of the project was to obtain a continuous and highly resolved record of sea ice dynamics and other environmental parameters during the late Holocene. With this goal in mind, the coring site was chosen in the inner bay where the Holocene unit is particularly expanded (up to 60 m thick). Bottom core AMS 14C dating of the acid insoluble organic fraction (2820 cal. aBP after reservoir correction) indicates an average annual sedimentation rate of ca. 0.5 cm/y. X-ray radiographs show well-preserved laminated sediments dominated by diatom oozes alternating with dark-like sediments likely supplied from the inner bay. In this abstract, we present high resolution bulk organic carbon geochemistry (δ13C and carbon content), XRF core scanning data, diatom assemblages and lipid biomarker results. Specific focus will be placed on the di-unsaturated highly branched isoprenoid biomarker IPSO25, which has been recently proposed as a proxy of Antarctic landfast sea ice. Conference Object Antarc* Antarctic Antarctica Ross Sea Sea ice ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic Cape Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Edisto ENVELOPE(-67.133,-67.133,-68.217,-68.217) Edisto Inlet ENVELOPE(170.083,170.083,-72.333,-72.333) Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Inner Bay ENVELOPE(-37.967,-37.967,-54.017,-54.017) Ross Sea |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
description |
Reconstruction of past changes to sea ice extent is central to understanding the factors that control its distribution and informs how changes in sea ice might occur in the future. Such reconstructions are often hindered, however, by poor age control (or resolution) in marine archives, or the absence of robust proxy signatures. Here, we show preliminary results from a 14.6 m long piston-core collected in the Edisto inlet (Cape Hallett, Ross Sea, Antarctica). The aim of the project was to obtain a continuous and highly resolved record of sea ice dynamics and other environmental parameters during the late Holocene. With this goal in mind, the coring site was chosen in the inner bay where the Holocene unit is particularly expanded (up to 60 m thick). Bottom core AMS 14C dating of the acid insoluble organic fraction (2820 cal. aBP after reservoir correction) indicates an average annual sedimentation rate of ca. 0.5 cm/y. X-ray radiographs show well-preserved laminated sediments dominated by diatom oozes alternating with dark-like sediments likely supplied from the inner bay. In this abstract, we present high resolution bulk organic carbon geochemistry (δ13C and carbon content), XRF core scanning data, diatom assemblages and lipid biomarker results. Specific focus will be placed on the di-unsaturated highly branched isoprenoid biomarker IPSO25, which has been recently proposed as a proxy of Antarctic landfast sea ice. |
author2 |
Tesi, Tommaso Langone, Leonardo Belt, Simon Smik, Luka Morigi, Caterina Gariboldi, Karen Gandolfi, Antonella Colizza, Ester Giglio, Federico Giordano, Patrizia Finocchiaro, Furio Capotondi, Lucilla Gallerani, Andrea |
format |
Conference Object |
author |
Tommaso Tesi Leonardo Langone Simon Belt Lukas Smik Caterina Morigi Karen Gariboldi Antonella Gandolfi Ester Colizza Federico Giglio Patrizia Giordano Furio Finocchiaro Lucilla Capotondi Andrea Gallerani |
spellingShingle |
Tommaso Tesi Leonardo Langone Simon Belt Lukas Smik Caterina Morigi Karen Gariboldi Antonella Gandolfi Ester Colizza Federico Giglio Patrizia Giordano Furio Finocchiaro Lucilla Capotondi Andrea Gallerani Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) |
author_facet |
Tommaso Tesi Leonardo Langone Simon Belt Lukas Smik Caterina Morigi Karen Gariboldi Antonella Gandolfi Ester Colizza Federico Giglio Patrizia Giordano Furio Finocchiaro Lucilla Capotondi Andrea Gallerani |
author_sort |
Tommaso Tesi |
title |
Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) |
title_short |
Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) |
title_full |
Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) |
title_fullStr |
Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) |
title_full_unstemmed |
Sea Ice Reconstruction Over the Last 3ka BP in the Ross Sea (Antarctica) |
title_sort |
sea ice reconstruction over the last 3ka bp in the ross sea (antarctica) |
publisher |
country:CHE |
publishDate |
2018 |
url |
http://hdl.handle.net/11568/947698 |
long_lat |
ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(-67.133,-67.133,-68.217,-68.217) ENVELOPE(170.083,170.083,-72.333,-72.333) ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(-37.967,-37.967,-54.017,-54.017) |
geographic |
Antarctic Cape Hallett Edisto Edisto Inlet Hallett Inner Bay Ross Sea |
geographic_facet |
Antarctic Cape Hallett Edisto Edisto Inlet Hallett Inner Bay Ross Sea |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/isbn/978-0-948277-54-2 ispartofbook:POLAR2018-Where the Poles come together. Abstract Proceedings Open Science Conference. POLAR2018-Where the Poles come together. firstpage:1701 lastpage:1701 numberofpages:1 http://hdl.handle.net/11568/947698 |
_version_ |
1796317848853807104 |