Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum
The Eocene-Oligocene Transition (EOT; ~34.4–33.7 Ma) was a major shift in Earth’s long-term climatic evolution, marking the cooling from the early Paleogene greenhouse to the icehouse regime that has prevailed from the Oligocene until today. However, it remains uncertain which landmasses were alread...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2022
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/56851/ https://hdl.handle.net/10013/epic.b6d82c5c-3be3-4c6e-8687-2a73f0bf067c |
id |
ftawi:oai:epic.awi.de:56851 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:56851 2023-05-15T13:45:22+02:00 Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Gohl, Karsten Bickert, Thorsten Kuhn, Gerhard Lohmann, Gerrit Knahl, Hanna S. Gierz, Paul Niu, Lu Titschack, Jürgen Frederichs, Thomas Müller, Juliane Bauersachs, Thorsten Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Nehrke, Gernot Rodríguez-Tovar, Francisco J Schmiedl, Gerhard Spezzaferri, Silvia van de Flierdt, Tina Eisenhauer, Anton Uenzelmann-Neben, Gabriele Esper, Oliver Smith, James A. Pälike, Heiko Spiegel, Cornelia Freudenthal, Tim 2022 https://epic.awi.de/id/eprint/56851/ https://hdl.handle.net/10013/epic.b6d82c5c-3be3-4c6e-8687-2a73f0bf067c unknown Klages, J. P. orcid:0000-0003-0968-1183 , Hillenbrand, C. D. , Bohaty, S. M. , Salzmann, U. orcid:0000-0001-5598-5327 , Gohl, K. orcid:0000-0002-9558-2116 , Bickert, T. , Kuhn, G. orcid:0000-0001-6069-7485 , Lohmann, G. orcid:0000-0003-2089-733X , Knahl, H. S. , Gierz, P. orcid:0000-0002-4512-087X , Niu, L. orcid:0000-0002-8314-7416 , Titschack, J. , Frederichs, T. , Müller, J. orcid:0000-0003-0724-4131 , Bauersachs, T. , Larter, R. D. , Hochmuth, K. orcid:0000-0003-2789-2179 , Ehrmann, W. , Nehrke, G. orcid:0000-0002-2851-3049 , Rodríguez-Tovar, F. J. , Schmiedl, G. , Spezzaferri, S. , van de Flierdt, T. , Eisenhauer, A. , Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 , Esper, O. orcid:0000-0002-4342-3471 , Smith, J. A. , Pälike, H. , Spiegel, C. and Freudenthal, T. , Science Team of Expedition PS104 (2022) Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum , 12th International Conference on Climatic and Biotic Events of the Paleogene, Bremen, Germany, 22 August 2022 - 25 August 2022 . hdl:10013/epic.b6d82c5c-3be3-4c6e-8687-2a73f0bf067c EPIC312th International Conference on Climatic and Biotic Events of the Paleogene, Bremen, Germany, 2022-08-22-2022-08-25 Conference NonPeerReviewed 2022 ftawi 2022-08-28T23:12:30Z The Eocene-Oligocene Transition (EOT; ~34.4–33.7 Ma) was a major shift in Earth’s long-term climatic evolution, marking the cooling from the early Paleogene greenhouse to the icehouse regime that has prevailed from the Oligocene until today. However, it remains uncertain which landmasses were already covered by ice sheets during the Early Oligocene Glacial Maximum (EOGM; ~33.7–33.2 Ma), an interval of peak glaciation immediately following the EOT. The scarcity of earliest Oligocene climate records in both Arctic and Antarctic regions hitherto prevented the reconstruction of environmental conditions and ice-sheet extent during the EOGM. Such constraints, however, are critical for assessing ice–ocean–atmosphere interactions during the early stages of the Cenozoic icehouse. Here, we present the first shallow-marine drill-core record of earliest Oligocene environmental conditions in West Antarctica’s Pacific sector. It comprises marine mudstones documenting the presence of a cool-temperate Nothofagus-dominated forest situated within a marine archipelago at 73.5°S palaeolatitude. Any evidence for marine-terminating glaciers is lacking, thus no land-based ice or only small ice caps existed in West Antarctica during the EOGM. Our new EOGM temperature and topographical constraints allow for more reliable verification of a fully-coupled Earth System Model. It simulates a large East Antarctic ice sheet already during the EOGM. However, West Antarctica does not glaciate until ~26 Ma, thereby illustrating the significance of asymmetric Antarctic ice sheet response during initial Cenozoic glaciation and highlighting the importance of differential regional response for future cryospheric change. Conference Object Antarc* Antarctic Antarctica Arctic Ice Sheet West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Antarctic West Antarctica East Antarctic Ice Sheet Pacific |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The Eocene-Oligocene Transition (EOT; ~34.4–33.7 Ma) was a major shift in Earth’s long-term climatic evolution, marking the cooling from the early Paleogene greenhouse to the icehouse regime that has prevailed from the Oligocene until today. However, it remains uncertain which landmasses were already covered by ice sheets during the Early Oligocene Glacial Maximum (EOGM; ~33.7–33.2 Ma), an interval of peak glaciation immediately following the EOT. The scarcity of earliest Oligocene climate records in both Arctic and Antarctic regions hitherto prevented the reconstruction of environmental conditions and ice-sheet extent during the EOGM. Such constraints, however, are critical for assessing ice–ocean–atmosphere interactions during the early stages of the Cenozoic icehouse. Here, we present the first shallow-marine drill-core record of earliest Oligocene environmental conditions in West Antarctica’s Pacific sector. It comprises marine mudstones documenting the presence of a cool-temperate Nothofagus-dominated forest situated within a marine archipelago at 73.5°S palaeolatitude. Any evidence for marine-terminating glaciers is lacking, thus no land-based ice or only small ice caps existed in West Antarctica during the EOGM. Our new EOGM temperature and topographical constraints allow for more reliable verification of a fully-coupled Earth System Model. It simulates a large East Antarctic ice sheet already during the EOGM. However, West Antarctica does not glaciate until ~26 Ma, thereby illustrating the significance of asymmetric Antarctic ice sheet response during initial Cenozoic glaciation and highlighting the importance of differential regional response for future cryospheric change. |
format |
Conference Object |
author |
Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Gohl, Karsten Bickert, Thorsten Kuhn, Gerhard Lohmann, Gerrit Knahl, Hanna S. Gierz, Paul Niu, Lu Titschack, Jürgen Frederichs, Thomas Müller, Juliane Bauersachs, Thorsten Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Nehrke, Gernot Rodríguez-Tovar, Francisco J Schmiedl, Gerhard Spezzaferri, Silvia van de Flierdt, Tina Eisenhauer, Anton Uenzelmann-Neben, Gabriele Esper, Oliver Smith, James A. Pälike, Heiko Spiegel, Cornelia Freudenthal, Tim |
spellingShingle |
Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Gohl, Karsten Bickert, Thorsten Kuhn, Gerhard Lohmann, Gerrit Knahl, Hanna S. Gierz, Paul Niu, Lu Titschack, Jürgen Frederichs, Thomas Müller, Juliane Bauersachs, Thorsten Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Nehrke, Gernot Rodríguez-Tovar, Francisco J Schmiedl, Gerhard Spezzaferri, Silvia van de Flierdt, Tina Eisenhauer, Anton Uenzelmann-Neben, Gabriele Esper, Oliver Smith, James A. Pälike, Heiko Spiegel, Cornelia Freudenthal, Tim Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum |
author_facet |
Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Gohl, Karsten Bickert, Thorsten Kuhn, Gerhard Lohmann, Gerrit Knahl, Hanna S. Gierz, Paul Niu, Lu Titschack, Jürgen Frederichs, Thomas Müller, Juliane Bauersachs, Thorsten Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Nehrke, Gernot Rodríguez-Tovar, Francisco J Schmiedl, Gerhard Spezzaferri, Silvia van de Flierdt, Tina Eisenhauer, Anton Uenzelmann-Neben, Gabriele Esper, Oliver Smith, James A. Pälike, Heiko Spiegel, Cornelia Freudenthal, Tim |
author_sort |
Klages, Johann Philipp |
title |
Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum |
title_short |
Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum |
title_full |
Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum |
title_fullStr |
Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum |
title_full_unstemmed |
Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum |
title_sort |
asymmetry in antarctic ice sheet cover during the early oligocene glacial maximum |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/56851/ https://hdl.handle.net/10013/epic.b6d82c5c-3be3-4c6e-8687-2a73f0bf067c |
geographic |
Arctic Antarctic West Antarctica East Antarctic Ice Sheet Pacific |
geographic_facet |
Arctic Antarctic West Antarctica East Antarctic Ice Sheet Pacific |
genre |
Antarc* Antarctic Antarctica Arctic Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Arctic Ice Sheet West Antarctica |
op_source |
EPIC312th International Conference on Climatic and Biotic Events of the Paleogene, Bremen, Germany, 2022-08-22-2022-08-25 |
op_relation |
Klages, J. P. orcid:0000-0003-0968-1183 , Hillenbrand, C. D. , Bohaty, S. M. , Salzmann, U. orcid:0000-0001-5598-5327 , Gohl, K. orcid:0000-0002-9558-2116 , Bickert, T. , Kuhn, G. orcid:0000-0001-6069-7485 , Lohmann, G. orcid:0000-0003-2089-733X , Knahl, H. S. , Gierz, P. orcid:0000-0002-4512-087X , Niu, L. orcid:0000-0002-8314-7416 , Titschack, J. , Frederichs, T. , Müller, J. orcid:0000-0003-0724-4131 , Bauersachs, T. , Larter, R. D. , Hochmuth, K. orcid:0000-0003-2789-2179 , Ehrmann, W. , Nehrke, G. orcid:0000-0002-2851-3049 , Rodríguez-Tovar, F. J. , Schmiedl, G. , Spezzaferri, S. , van de Flierdt, T. , Eisenhauer, A. , Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 , Esper, O. orcid:0000-0002-4342-3471 , Smith, J. A. , Pälike, H. , Spiegel, C. and Freudenthal, T. , Science Team of Expedition PS104 (2022) Asymmetry in Antarctic ice sheet cover during the early Oligocene glacial maximum , 12th International Conference on Climatic and Biotic Events of the Paleogene, Bremen, Germany, 22 August 2022 - 25 August 2022 . hdl:10013/epic.b6d82c5c-3be3-4c6e-8687-2a73f0bf067c |
_version_ |
1766222944709640192 |