Relative abundances of sea ice-related diatoms in sediment core MD03-2601
Diatom data from a marine sediment core give insight on Holocene changes in sea-surface conditions and climate at high southern latitudes off Adélie Land, East Antarctica. The early to mid-Holocene was warmer than the late Holocene with a transition at ~4000 calendar years B. P. Sea ice was less pre...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.788320 2023-05-15T13:55:15+02:00 Relative abundances of sea ice-related diatoms in sediment core MD03-2601 Crosta, Xavier Debret, Maxime Denis, Delphine Courty, M A Ther, Olivier LATITUDE: -66.051200 * LONGITUDE: 138.557200 * DATE/TIME START: 2003-02-08T08:51:00 * DATE/TIME END: 2003-02-08T08:51:00 * MINIMUM DEPTH, sediment/rock: 0.00 m * MAXIMUM DEPTH, sediment/rock: 40.24 m 2007-09-07 text/tab-separated-values, 528 data points https://doi.pangaea.de/10.1594/PANGAEA.788320 https://doi.org/10.1594/PANGAEA.788320 en eng PANGAEA Crosta, Xavier; Denis, Delphine; Ther, Olivier (2008): Sea ice seasonality during the Holocene, Adélie Land, East Antarctica. Marine Micropaleontology, 66(3-4), 222-232, https://doi.org/10.1016/j.marmicro.2007.10.001 Denis, Delphine; Crosta, Xavier; Schmidt, Sabine; Carson, Damien S; Ganeshram, Raja S; Renssen, Hans; Bout-Roumazeilles, Viviane; Zaragosi, Sebastien; Martin, Bernard; Cremer, Michel; Giraudeau, Jacques (2009): Holocene glacier and deep water dynamics, Adélie Land region, East Antarctica. Quaternary Science Reviews, 28(13-14), 1291-1303, https://doi.org/10.1016/j.quascirev.2008.12.024 Denis, Delphine; Crosta, Xavier; Schmidt, Sabine; Carson, Damien S; Ganeshram, Raja S; Renssen, Hans; Crespin, Julien; Ther, Olivier; Billy, Isabelle; Giraudeau, Jacques (2009): Holocene productivity changes off Adélie Land (East Antarctica). Paleoceanography, 24(3), PA3207, https://doi.org/10.1029/2008PA001689 https://doi.pangaea.de/10.1594/PANGAEA.788320 https://doi.org/10.1594/PANGAEA.788320 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Crosta, Xavier; Debret, Maxime; Denis, Delphine; Courty, M A; Ther, Olivier (2007): Holocene long- and short-term climate changes off Adélie Land, East Antarctica. Geochemistry, Geophysics, Geosystems, Q11009, https://doi.org/10.1029/2007GC001718 AGE CALYPSO Calypso Corer DEPTH sediment/rock Fragilariopsis curta and Fragilariopsis cylindrus IMAGES X - CADO Marion Dufresne (1995) MD032601 MD03-2601 MD130 Southern Ocean Dataset 2007 ftpangaea https://doi.org/10.1594/PANGAEA.788320 https://doi.org/10.1029/2007GC001718 https://doi.org/10.1016/j.marmicro.2007.10.001 https://doi.org/10.1016/j.quascirev.2008.12.024 https://doi.org/10.1029/2008PA001689 2023-01-20T08:55:14Z Diatom data from a marine sediment core give insight on Holocene changes in sea-surface conditions and climate at high southern latitudes off Adélie Land, East Antarctica. The early to mid-Holocene was warmer than the late Holocene with a transition at ~4000 calendar years B. P. Sea ice was less present and spring-summer growing season was greater during the warm period relative to the cold one, thus limiting sea ice diatom production and favoring more open ocean diatom to develop. The long-term Holocene climatic evolution in East Antarctica is explained by a combination of a delayed response to local seasonal insolation changes coupled to the long memory of the Southern Ocean. Abrupt variations of the diatom relative abundances, indicating rapid climate changes, are superimposed to the Holocene long-term trends. Spectral analyses calculate robust frequencies at ~1600 a (where “a” is years), ~1250 a, ~1050 a, ~570 a, ~310 a, ~230 a, ~150–125 a, ~110 a, ~90 a, and ~66 a. Such periods are very close to solar activity cyclicities, except for the periods at ~310 a and ~1250 a, which are close to internal climate variability cyclicities. Wavelet analyses estimate the same periods but indicate nonstationary cyclicities. Rapid climate changes at high southern latitudes may therefore be explained by a combination of external (solar) and internal (thermohaline circulation) forcings. Dataset Antarc* Antarctica East Antarctica Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science East Antarctica Southern Ocean ENVELOPE(138.557200,138.557200,-66.051200,-66.051200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AGE CALYPSO Calypso Corer DEPTH sediment/rock Fragilariopsis curta and Fragilariopsis cylindrus IMAGES X - CADO Marion Dufresne (1995) MD032601 MD03-2601 MD130 Southern Ocean |
spellingShingle |
AGE CALYPSO Calypso Corer DEPTH sediment/rock Fragilariopsis curta and Fragilariopsis cylindrus IMAGES X - CADO Marion Dufresne (1995) MD032601 MD03-2601 MD130 Southern Ocean Crosta, Xavier Debret, Maxime Denis, Delphine Courty, M A Ther, Olivier Relative abundances of sea ice-related diatoms in sediment core MD03-2601 |
topic_facet |
AGE CALYPSO Calypso Corer DEPTH sediment/rock Fragilariopsis curta and Fragilariopsis cylindrus IMAGES X - CADO Marion Dufresne (1995) MD032601 MD03-2601 MD130 Southern Ocean |
description |
Diatom data from a marine sediment core give insight on Holocene changes in sea-surface conditions and climate at high southern latitudes off Adélie Land, East Antarctica. The early to mid-Holocene was warmer than the late Holocene with a transition at ~4000 calendar years B. P. Sea ice was less present and spring-summer growing season was greater during the warm period relative to the cold one, thus limiting sea ice diatom production and favoring more open ocean diatom to develop. The long-term Holocene climatic evolution in East Antarctica is explained by a combination of a delayed response to local seasonal insolation changes coupled to the long memory of the Southern Ocean. Abrupt variations of the diatom relative abundances, indicating rapid climate changes, are superimposed to the Holocene long-term trends. Spectral analyses calculate robust frequencies at ~1600 a (where “a” is years), ~1250 a, ~1050 a, ~570 a, ~310 a, ~230 a, ~150–125 a, ~110 a, ~90 a, and ~66 a. Such periods are very close to solar activity cyclicities, except for the periods at ~310 a and ~1250 a, which are close to internal climate variability cyclicities. Wavelet analyses estimate the same periods but indicate nonstationary cyclicities. Rapid climate changes at high southern latitudes may therefore be explained by a combination of external (solar) and internal (thermohaline circulation) forcings. |
format |
Dataset |
author |
Crosta, Xavier Debret, Maxime Denis, Delphine Courty, M A Ther, Olivier |
author_facet |
Crosta, Xavier Debret, Maxime Denis, Delphine Courty, M A Ther, Olivier |
author_sort |
Crosta, Xavier |
title |
Relative abundances of sea ice-related diatoms in sediment core MD03-2601 |
title_short |
Relative abundances of sea ice-related diatoms in sediment core MD03-2601 |
title_full |
Relative abundances of sea ice-related diatoms in sediment core MD03-2601 |
title_fullStr |
Relative abundances of sea ice-related diatoms in sediment core MD03-2601 |
title_full_unstemmed |
Relative abundances of sea ice-related diatoms in sediment core MD03-2601 |
title_sort |
relative abundances of sea ice-related diatoms in sediment core md03-2601 |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.788320 https://doi.org/10.1594/PANGAEA.788320 |
op_coverage |
LATITUDE: -66.051200 * LONGITUDE: 138.557200 * DATE/TIME START: 2003-02-08T08:51:00 * DATE/TIME END: 2003-02-08T08:51:00 * MINIMUM DEPTH, sediment/rock: 0.00 m * MAXIMUM DEPTH, sediment/rock: 40.24 m |
long_lat |
ENVELOPE(138.557200,138.557200,-66.051200,-66.051200) |
geographic |
East Antarctica Southern Ocean |
geographic_facet |
East Antarctica Southern Ocean |
genre |
Antarc* Antarctica East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice Southern Ocean |
op_source |
Supplement to: Crosta, Xavier; Debret, Maxime; Denis, Delphine; Courty, M A; Ther, Olivier (2007): Holocene long- and short-term climate changes off Adélie Land, East Antarctica. Geochemistry, Geophysics, Geosystems, Q11009, https://doi.org/10.1029/2007GC001718 |
op_relation |
Crosta, Xavier; Denis, Delphine; Ther, Olivier (2008): Sea ice seasonality during the Holocene, Adélie Land, East Antarctica. Marine Micropaleontology, 66(3-4), 222-232, https://doi.org/10.1016/j.marmicro.2007.10.001 Denis, Delphine; Crosta, Xavier; Schmidt, Sabine; Carson, Damien S; Ganeshram, Raja S; Renssen, Hans; Bout-Roumazeilles, Viviane; Zaragosi, Sebastien; Martin, Bernard; Cremer, Michel; Giraudeau, Jacques (2009): Holocene glacier and deep water dynamics, Adélie Land region, East Antarctica. Quaternary Science Reviews, 28(13-14), 1291-1303, https://doi.org/10.1016/j.quascirev.2008.12.024 Denis, Delphine; Crosta, Xavier; Schmidt, Sabine; Carson, Damien S; Ganeshram, Raja S; Renssen, Hans; Crespin, Julien; Ther, Olivier; Billy, Isabelle; Giraudeau, Jacques (2009): Holocene productivity changes off Adélie Land (East Antarctica). Paleoceanography, 24(3), PA3207, https://doi.org/10.1029/2008PA001689 https://doi.pangaea.de/10.1594/PANGAEA.788320 https://doi.org/10.1594/PANGAEA.788320 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.788320 https://doi.org/10.1029/2007GC001718 https://doi.org/10.1016/j.marmicro.2007.10.001 https://doi.org/10.1016/j.quascirev.2008.12.024 https://doi.org/10.1029/2008PA001689 |
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