West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data
Observations of rapid ongoing grounding line retreat, ice shelf thinning and accelerated ice flow from the West Antarctic Ice Sheet (WAIS) may forebode a possible collapse if global temperatures continue to increase. Understanding and reconstructing West Antarctic Ice Sheet dynamics in past warmer-t...
Published in: | Frontiers in Earth Science |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media S.A.
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3389/feart.2022.976703 https://doaj.org/article/aa797703ad3047b3a8eea24125b67843 |
id |
ftdoajarticles:oai:doaj.org/article:aa797703ad3047b3a8eea24125b67843 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:aa797703ad3047b3a8eea24125b67843 2023-05-15T13:23:38+02:00 West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data Johanna Gille-Petzoldt Karsten Gohl Gabriele Uenzelmann-Neben Jens Grützner Johann P. Klages IODP Expedition 379 Scientists T. Bauersachs M. Courtillat E. Cowan M. De Lira Mota M. Esteves J. Fegyveresi L. Gao A. Halberstadt K. Horikawa M. Iwai J. Kim T. King A. Klaus D. Kulhanek M. Penkrot J. Prebble W. Rahaman B. Reinardy J. Renaudie D. Robinson R. Scherer C. Siddoway L. Wu M. Yamane 2022-12-01T00:00:00Z https://doi.org/10.3389/feart.2022.976703 https://doaj.org/article/aa797703ad3047b3a8eea24125b67843 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2022.976703/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.976703 https://doaj.org/article/aa797703ad3047b3a8eea24125b67843 Frontiers in Earth Science, Vol 10 (2022) Amundsen Sea Pliocene core-log seismic integration IODP Expedition 379 West Antarctic Ice Sheet sediment drift Science Q article 2022 ftdoajarticles https://doi.org/10.3389/feart.2022.976703 2022-12-30T22:20:31Z Observations of rapid ongoing grounding line retreat, ice shelf thinning and accelerated ice flow from the West Antarctic Ice Sheet (WAIS) may forebode a possible collapse if global temperatures continue to increase. Understanding and reconstructing West Antarctic Ice Sheet dynamics in past warmer-than-present times will inform about its behavior as an analogue for future climate scenarios. International Ocean Discovery Program (IODP) Expedition 379 visited the Amundsen Sea sector of Antarctica to obtain geological records suitable for this purpose. During the expedition, cores from two drill sites at the Resolution Drift on the continental rise returned sediments whose deposition was possibly influenced by West Antarctic Ice Sheet dynamics from late Miocene to Holocene times. To examine the West Antarctic Ice Sheet dynamics, shipboard physical properties and sedimentological data are correlated with seismic data and extrapolated across the Resolution Drift via core-log-seismic integration. An interval with strongly variable physical properties, high diatom abundance and ice-rafted debris occurrence, correlating with partially high amplitude seismic reflection characteristics was identified between 4.2 and 3.2 Ma. Sedimentation during this interval is interpreted as having occurred during an extended warm period with a dynamic West Antarctic Ice Sheet in the Amundsen Sea sector. These records compare to those of other drill sites in the Ross Sea and the Bellingshausen Sea, and thus suggest an almost simultaneous occurrence of extended warm periods in all three locations. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ross Sea Directory of Open Access Journals: DOAJ Articles Amundsen Sea Antarctic Bellingshausen Sea Ross Sea West Antarctic Ice Sheet Frontiers in Earth Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Amundsen Sea Pliocene core-log seismic integration IODP Expedition 379 West Antarctic Ice Sheet sediment drift Science Q |
spellingShingle |
Amundsen Sea Pliocene core-log seismic integration IODP Expedition 379 West Antarctic Ice Sheet sediment drift Science Q Johanna Gille-Petzoldt Karsten Gohl Gabriele Uenzelmann-Neben Jens Grützner Johann P. Klages IODP Expedition 379 Scientists T. Bauersachs M. Courtillat E. Cowan M. De Lira Mota M. Esteves J. Fegyveresi L. Gao A. Halberstadt K. Horikawa M. Iwai J. Kim T. King A. Klaus D. Kulhanek M. Penkrot J. Prebble W. Rahaman B. Reinardy J. Renaudie D. Robinson R. Scherer C. Siddoway L. Wu M. Yamane West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data |
topic_facet |
Amundsen Sea Pliocene core-log seismic integration IODP Expedition 379 West Antarctic Ice Sheet sediment drift Science Q |
description |
Observations of rapid ongoing grounding line retreat, ice shelf thinning and accelerated ice flow from the West Antarctic Ice Sheet (WAIS) may forebode a possible collapse if global temperatures continue to increase. Understanding and reconstructing West Antarctic Ice Sheet dynamics in past warmer-than-present times will inform about its behavior as an analogue for future climate scenarios. International Ocean Discovery Program (IODP) Expedition 379 visited the Amundsen Sea sector of Antarctica to obtain geological records suitable for this purpose. During the expedition, cores from two drill sites at the Resolution Drift on the continental rise returned sediments whose deposition was possibly influenced by West Antarctic Ice Sheet dynamics from late Miocene to Holocene times. To examine the West Antarctic Ice Sheet dynamics, shipboard physical properties and sedimentological data are correlated with seismic data and extrapolated across the Resolution Drift via core-log-seismic integration. An interval with strongly variable physical properties, high diatom abundance and ice-rafted debris occurrence, correlating with partially high amplitude seismic reflection characteristics was identified between 4.2 and 3.2 Ma. Sedimentation during this interval is interpreted as having occurred during an extended warm period with a dynamic West Antarctic Ice Sheet in the Amundsen Sea sector. These records compare to those of other drill sites in the Ross Sea and the Bellingshausen Sea, and thus suggest an almost simultaneous occurrence of extended warm periods in all three locations. |
format |
Article in Journal/Newspaper |
author |
Johanna Gille-Petzoldt Karsten Gohl Gabriele Uenzelmann-Neben Jens Grützner Johann P. Klages IODP Expedition 379 Scientists T. Bauersachs M. Courtillat E. Cowan M. De Lira Mota M. Esteves J. Fegyveresi L. Gao A. Halberstadt K. Horikawa M. Iwai J. Kim T. King A. Klaus D. Kulhanek M. Penkrot J. Prebble W. Rahaman B. Reinardy J. Renaudie D. Robinson R. Scherer C. Siddoway L. Wu M. Yamane |
author_facet |
Johanna Gille-Petzoldt Karsten Gohl Gabriele Uenzelmann-Neben Jens Grützner Johann P. Klages IODP Expedition 379 Scientists T. Bauersachs M. Courtillat E. Cowan M. De Lira Mota M. Esteves J. Fegyveresi L. Gao A. Halberstadt K. Horikawa M. Iwai J. Kim T. King A. Klaus D. Kulhanek M. Penkrot J. Prebble W. Rahaman B. Reinardy J. Renaudie D. Robinson R. Scherer C. Siddoway L. Wu M. Yamane |
author_sort |
Johanna Gille-Petzoldt |
title |
West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data |
title_short |
West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data |
title_full |
West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data |
title_fullStr |
West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data |
title_full_unstemmed |
West Antarctic Ice Sheet Dynamics in the Amundsen Sea Sector since the Late Miocene—Tying IODP Expedition 379 Results to Seismic Data |
title_sort |
west antarctic ice sheet dynamics in the amundsen sea sector since the late miocene—tying iodp expedition 379 results to seismic data |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/feart.2022.976703 https://doaj.org/article/aa797703ad3047b3a8eea24125b67843 |
geographic |
Amundsen Sea Antarctic Bellingshausen Sea Ross Sea West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Bellingshausen Sea Ross Sea West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ross Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ross Sea |
op_source |
Frontiers in Earth Science, Vol 10 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2022.976703/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.976703 https://doaj.org/article/aa797703ad3047b3a8eea24125b67843 |
op_doi |
https://doi.org/10.3389/feart.2022.976703 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
_version_ |
1766373652149829632 |