Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): D02112, doi:10.1029/2007JD008790. A new melt layer...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2008
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/3544 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3544 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3544 2023-05-15T13:53:14+02:00 Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica Das, Sarah B. Alley, Richard B. 2008-01-29 application/pdf https://hdl.handle.net/1912/3544 en_US eng American Geophysical Union https://doi.org/10.1029/2007JD008790 Journal of Geophysical Research 113 (2008): D02112 https://hdl.handle.net/1912/3544 doi:10.1029/2007JD008790 Journal of Geophysical Research 113 (2008): D02112 doi:10.1029/2007JD008790 Siple Dome Melt layer record Antarctica Holocene climate Article 2008 ftwhoas https://doi.org/10.1029/2007JD008790 2022-05-28T22:58:00Z Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): D02112, doi:10.1029/2007JD008790. A new melt layer history from Siple Dome, West Antarctica, indicates notable late-Holocene summertime warming. Visual stratigraphic analyses of the 1004-m ice core identified 62 years with melt layers. Melting events began around 11.7 ka, followed by a period of no melting from 8.8–6.6 ka. Melt layer frequency increased from 6.6 ka to the present, with the 1000-year-average melt layer frequency reaching a maximum of 2% at 0.8 ka. We use our millennial-scale archive of melt events as a unique seasonal paleothermometer to elucidate changes in West Antarctic Holocene summer climate. Our calibration suggests the change in melt frequency from 0% to 2% may represent a summer temperature increase of ≥2°C from the middle to late Holocene. This temperature change cannot be explained entirely by local change in ice elevation or summer insolation and is in contrast to East Antarctic climate records, which show peak warmth in the early Holocene followed by stable or decreasing temperature. We interpret the rise in melt frequency as evidence of an increasing marine influence on the Ross Sea sector of West Antarctica. Although the surface elevation of Siple Dome has not changed greatly, the continued lateral retreat of the West Antarctic ice sheet from its Last Glacial Maximum configuration (across the outer continental shelf), and the delayed drawdown in ice thickness from the adjacent coastal Marie Byrd Land region, in conjunction with periods of increased cyclogenesis, perhaps related to variations in ENSO, would allow a moderated maritime climate to more easily reach West Antarctica. This research was supported by NSF grant OPP-9814485 and NASA grant NAG5-7776 to Penn State University and by a NASA Earth System Science Graduate Fellowship ... Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet Marie Byrd Land Ross Sea West Antarctica Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Ross Sea Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) West Antarctic Ice Sheet West Antarctica Journal of Geophysical Research 113 D2 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Siple Dome Melt layer record Antarctica Holocene climate |
spellingShingle |
Siple Dome Melt layer record Antarctica Holocene climate Das, Sarah B. Alley, Richard B. Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica |
topic_facet |
Siple Dome Melt layer record Antarctica Holocene climate |
description |
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): D02112, doi:10.1029/2007JD008790. A new melt layer history from Siple Dome, West Antarctica, indicates notable late-Holocene summertime warming. Visual stratigraphic analyses of the 1004-m ice core identified 62 years with melt layers. Melting events began around 11.7 ka, followed by a period of no melting from 8.8–6.6 ka. Melt layer frequency increased from 6.6 ka to the present, with the 1000-year-average melt layer frequency reaching a maximum of 2% at 0.8 ka. We use our millennial-scale archive of melt events as a unique seasonal paleothermometer to elucidate changes in West Antarctic Holocene summer climate. Our calibration suggests the change in melt frequency from 0% to 2% may represent a summer temperature increase of ≥2°C from the middle to late Holocene. This temperature change cannot be explained entirely by local change in ice elevation or summer insolation and is in contrast to East Antarctic climate records, which show peak warmth in the early Holocene followed by stable or decreasing temperature. We interpret the rise in melt frequency as evidence of an increasing marine influence on the Ross Sea sector of West Antarctica. Although the surface elevation of Siple Dome has not changed greatly, the continued lateral retreat of the West Antarctic ice sheet from its Last Glacial Maximum configuration (across the outer continental shelf), and the delayed drawdown in ice thickness from the adjacent coastal Marie Byrd Land region, in conjunction with periods of increased cyclogenesis, perhaps related to variations in ENSO, would allow a moderated maritime climate to more easily reach West Antarctica. This research was supported by NSF grant OPP-9814485 and NASA grant NAG5-7776 to Penn State University and by a NASA Earth System Science Graduate Fellowship ... |
format |
Article in Journal/Newspaper |
author |
Das, Sarah B. Alley, Richard B. |
author_facet |
Das, Sarah B. Alley, Richard B. |
author_sort |
Das, Sarah B. |
title |
Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica |
title_short |
Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica |
title_full |
Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica |
title_fullStr |
Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica |
title_full_unstemmed |
Rise in frequency of surface melting at Siple Dome through the Holocene : evidence for increasing marine influence on the climate of West Antarctica |
title_sort |
rise in frequency of surface melting at siple dome through the holocene : evidence for increasing marine influence on the climate of west antarctica |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
https://hdl.handle.net/1912/3544 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Antarctic Byrd Marie Byrd Land Ross Sea Siple Siple Dome West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic Byrd Marie Byrd Land Ross Sea Siple Siple Dome West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet Marie Byrd Land Ross Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet Marie Byrd Land Ross Sea West Antarctica |
op_source |
Journal of Geophysical Research 113 (2008): D02112 doi:10.1029/2007JD008790 |
op_relation |
https://doi.org/10.1029/2007JD008790 Journal of Geophysical Research 113 (2008): D02112 https://hdl.handle.net/1912/3544 doi:10.1029/2007JD008790 |
op_doi |
https://doi.org/10.1029/2007JD008790 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
D2 |
_version_ |
1766258227037601792 |