A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica)
Soluble major ions (Cl-, NO3-, SO42-), trace elements (Na, Ca, K, Li, Zn, Pb, Hg, Cd, Cu, V, Mn, Ni, As, Al, Fe, Se, and REEs) and water hydrogen isotopes (5D) were measured along a ~40-meter horizontal ice core from Mt. Moulton Blue Ice Area (BIA) in West Antarctica at a temporal sample resolution...
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
DigitalCommons@UMaine
2009
|
Subjects: | |
Online Access: | https://digitalcommons.library.umaine.edu/etd/1163 https://digitalcommons.library.umaine.edu/context/etd/article/2164/viewcontent/KorotkikhE2009.pdf |
id |
ftmaineuniv:oai:digitalcommons.library.umaine.edu:etd-2164 |
---|---|
record_format |
openpolar |
spelling |
ftmaineuniv:oai:digitalcommons.library.umaine.edu:etd-2164 2023-06-11T04:05:16+02:00 A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) Korotkikh, Elena 2009-01-01T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/etd/1163 https://digitalcommons.library.umaine.edu/context/etd/article/2164/viewcontent/KorotkikhE2009.pdf unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/etd/1163 https://digitalcommons.library.umaine.edu/context/etd/article/2164/viewcontent/KorotkikhE2009.pdf Electronic Theses and Dissertations Geochemistry Stratigraphy (Pleistocene) Antarctic Glaciers Earth Sciences Glaciology Stratigraphy text 2009 ftmaineuniv 2023-05-04T18:00:59Z Soluble major ions (Cl-, NO3-, SO42-), trace elements (Na, Ca, K, Li, Zn, Pb, Hg, Cd, Cu, V, Mn, Ni, As, Al, Fe, Se, and REEs) and water hydrogen isotopes (5D) were measured along a ~40-meter horizontal ice core from Mt. Moulton Blue Ice Area (BIA) in West Antarctica at a temporal sample resolution of ~6.5-7 years. The melted section covers the period from 107 to 136 ka BP, based on 40Ar/39Ar radiometric dates from three englacial tephra layers dated by Dunbar et al. (2008), thus overlapping onset and termination of the Eemian. The resulting time-series provides a first high-resolution record of the Eemian interglacial and transition to the subsequent glacial period from Antarctica and the first glaciochemical record for this period from West Antarctica. The Mt. Moulton deuterium record matches well (r = 0.62-0.84, >99.9%) with isotope records from East Antarctic deep ice cores (Vostok, Dome Fuji, EPICA Dome C and Taylor Dome). The major difference between Mt. Moulton and water isotope records from these other ice cores is between ~110-120 ka B.P. While all East Antarctic records show a continual decline in the isotope time series, the Moulton deuterium record is relatively stable, most likely due to the stronger and more consistent oceanic influence on the Mt. Moulton site. All Mt. Moulton chemical concentrations were higher during glacial conditions than during the Eemian interglacial, likely due to increased atmospheric circulation (dust elements, seasalts aerosols), increased sea ice extent (Na, nssSO42-) and increased oceanic productivity (nssSO42-) during the glacial period. The interpretation of the Mt. Moulton δD, seasalts, nssSO42- and dust records suggests that the Eemian began -134.3 ka B.P. and lasted approximately 10,500-15,300 years. Comparison of the Mt. Moulton Eemian with the Holocene records does not reveal any major cold events such as the Antarctic Cold Reversal (ACR) and suggests that the Eemian deglaciation was uninterrupted by major changes in climate on the scale of the ACR. The Mt. ... Text Antarc* Antarctic Antarctica EPICA ice core Sea ice West Antarctica The University of Maine: DigitalCommons@UMaine Antarctic Bia ENVELOPE(22.891,22.891,70.317,70.317) Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Dunbar ENVELOPE(-60.199,-60.199,-62.473,-62.473) Mount Moulton ENVELOPE(-135.133,-135.133,-76.050,-76.050) Taylor Dome ENVELOPE(157.667,157.667,-77.667,-77.667) The Antarctic West Antarctica |
institution |
Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Geochemistry Stratigraphy (Pleistocene) Antarctic Glaciers Earth Sciences Glaciology Stratigraphy |
spellingShingle |
Geochemistry Stratigraphy (Pleistocene) Antarctic Glaciers Earth Sciences Glaciology Stratigraphy Korotkikh, Elena A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) |
topic_facet |
Geochemistry Stratigraphy (Pleistocene) Antarctic Glaciers Earth Sciences Glaciology Stratigraphy |
description |
Soluble major ions (Cl-, NO3-, SO42-), trace elements (Na, Ca, K, Li, Zn, Pb, Hg, Cd, Cu, V, Mn, Ni, As, Al, Fe, Se, and REEs) and water hydrogen isotopes (5D) were measured along a ~40-meter horizontal ice core from Mt. Moulton Blue Ice Area (BIA) in West Antarctica at a temporal sample resolution of ~6.5-7 years. The melted section covers the period from 107 to 136 ka BP, based on 40Ar/39Ar radiometric dates from three englacial tephra layers dated by Dunbar et al. (2008), thus overlapping onset and termination of the Eemian. The resulting time-series provides a first high-resolution record of the Eemian interglacial and transition to the subsequent glacial period from Antarctica and the first glaciochemical record for this period from West Antarctica. The Mt. Moulton deuterium record matches well (r = 0.62-0.84, >99.9%) with isotope records from East Antarctic deep ice cores (Vostok, Dome Fuji, EPICA Dome C and Taylor Dome). The major difference between Mt. Moulton and water isotope records from these other ice cores is between ~110-120 ka B.P. While all East Antarctic records show a continual decline in the isotope time series, the Moulton deuterium record is relatively stable, most likely due to the stronger and more consistent oceanic influence on the Mt. Moulton site. All Mt. Moulton chemical concentrations were higher during glacial conditions than during the Eemian interglacial, likely due to increased atmospheric circulation (dust elements, seasalts aerosols), increased sea ice extent (Na, nssSO42-) and increased oceanic productivity (nssSO42-) during the glacial period. The interpretation of the Mt. Moulton δD, seasalts, nssSO42- and dust records suggests that the Eemian began -134.3 ka B.P. and lasted approximately 10,500-15,300 years. Comparison of the Mt. Moulton Eemian with the Holocene records does not reveal any major cold events such as the Antarctic Cold Reversal (ACR) and suggests that the Eemian deglaciation was uninterrupted by major changes in climate on the scale of the ACR. The Mt. ... |
format |
Text |
author |
Korotkikh, Elena |
author_facet |
Korotkikh, Elena |
author_sort |
Korotkikh, Elena |
title |
A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) |
title_short |
A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) |
title_full |
A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) |
title_fullStr |
A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) |
title_full_unstemmed |
A High Resolution Record of the Eemian Interglacial and Transition to the Next Glacial Period from Mount Moulton (West Antarctica) |
title_sort |
high resolution record of the eemian interglacial and transition to the next glacial period from mount moulton (west antarctica) |
publisher |
DigitalCommons@UMaine |
publishDate |
2009 |
url |
https://digitalcommons.library.umaine.edu/etd/1163 https://digitalcommons.library.umaine.edu/context/etd/article/2164/viewcontent/KorotkikhE2009.pdf |
long_lat |
ENVELOPE(22.891,22.891,70.317,70.317) ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(-60.199,-60.199,-62.473,-62.473) ENVELOPE(-135.133,-135.133,-76.050,-76.050) ENVELOPE(157.667,157.667,-77.667,-77.667) |
geographic |
Antarctic Bia Dome Fuji Dome The Dunbar Mount Moulton Taylor Dome The Antarctic West Antarctica |
geographic_facet |
Antarctic Bia Dome Fuji Dome The Dunbar Mount Moulton Taylor Dome The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica EPICA ice core Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core Sea ice West Antarctica |
op_source |
Electronic Theses and Dissertations |
op_relation |
https://digitalcommons.library.umaine.edu/etd/1163 https://digitalcommons.library.umaine.edu/context/etd/article/2164/viewcontent/KorotkikhE2009.pdf |
_version_ |
1768373611245076480 |