Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites
Ice cores from outside the Greenland and Antarctic ice sheets are difficult to date because of seasonal melting and multiple sources (terrestrial, marine, biogenic and anthropogenic) of sulfates deposited onto the ice. Here we present a method of volcanic sulfate extraction that relies on fitting su...
Main Authors: | , , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
2012
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.817167 https://doi.org/10.1594/PANGAEA.817167 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.817167 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.817167 2024-09-15T17:42:58+00:00 Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites Moore, John C Beaudon, Emilie Kang, Shichang Divine, Dmitry V Isaksson, Elisabeth Pohjola, Veijo A van de Wal, Roderik S W MEDIAN LATITUDE: 56.000200 * MEDIAN LONGITUDE: 49.623100 * SOUTH-BOUND LATITUDE: 28.030000 * WEST-BOUND LONGITUDE: 13.270000 * NORTH-BOUND LATITUDE: 79.970000 * EAST-BOUND LONGITUDE: 86.980000 * DATE/TIME START: 1995-01-01T00:00:00 * DATE/TIME END: 2005-01-01T00:00:00 2012 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.817167 https://doi.org/10.1594/PANGAEA.817167 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.817167 https://doi.org/10.1594/PANGAEA.817167 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Moore, John C; Beaudon, Emilie; Kang, Shichang; Divine, Dmitry V; Isaksson, Elisabeth; Pohjola, Veijo A; van de Wal, Roderik S W (2012): Statistical extraction of volcanic sulphate from nonpolar ice cores. Journal of Geophysical Research, 117(D3), D03306, https://doi.org/10.1029/2011JD016592 International Polar Year (2007-2008) IPY dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.81716710.1029/2011JD016592 2024-07-24T02:31:21Z Ice cores from outside the Greenland and Antarctic ice sheets are difficult to date because of seasonal melting and multiple sources (terrestrial, marine, biogenic and anthropogenic) of sulfates deposited onto the ice. Here we present a method of volcanic sulfate extraction that relies on fitting sulfate profiles to other ion species measured along the cores in moving windows in log space. We verify the method with a well dated section of the Belukha ice core from central Eurasia. There are excellent matches to volcanoes in the preindustrial, and clear extraction of volcanic peaks in the post-1940 period when a simple method based on calcium as a proxy for terrestrial sulfate fails due to anthropogenic sulfate deposition. We then attempt to use the same statistical scheme to locate volcanic sulfate horizons within three ice cores from Svalbard and a core from Mount Everest. Volcanic sulfate is <5% of the sulfate budget in every core, and differences in eruption signals extracted reflect the large differences in environment between western, northern and central regions of Svalbard. The Lomonosovfonna and Vestfonna cores span about the last 1000 years, with good extraction of volcanic signals, while Holtedahlfonna which extends to about AD1700 appears to lack a clear record. The Mount Everest core allows clean volcanic signal extraction and the core extends back to about AD700, slightly older than a previous flow model has suggested. The method may thus be used to extract historical volcanic records from a more diverse geographical range than hitherto. Other/Unknown Material Antarc* Antarctic Greenland ice core International Polar Year IPY Svalbard Vestfonna PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(13.270000,86.980000,79.970000,28.030000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Moore, John C Beaudon, Emilie Kang, Shichang Divine, Dmitry V Isaksson, Elisabeth Pohjola, Veijo A van de Wal, Roderik S W Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
Ice cores from outside the Greenland and Antarctic ice sheets are difficult to date because of seasonal melting and multiple sources (terrestrial, marine, biogenic and anthropogenic) of sulfates deposited onto the ice. Here we present a method of volcanic sulfate extraction that relies on fitting sulfate profiles to other ion species measured along the cores in moving windows in log space. We verify the method with a well dated section of the Belukha ice core from central Eurasia. There are excellent matches to volcanoes in the preindustrial, and clear extraction of volcanic peaks in the post-1940 period when a simple method based on calcium as a proxy for terrestrial sulfate fails due to anthropogenic sulfate deposition. We then attempt to use the same statistical scheme to locate volcanic sulfate horizons within three ice cores from Svalbard and a core from Mount Everest. Volcanic sulfate is <5% of the sulfate budget in every core, and differences in eruption signals extracted reflect the large differences in environment between western, northern and central regions of Svalbard. The Lomonosovfonna and Vestfonna cores span about the last 1000 years, with good extraction of volcanic signals, while Holtedahlfonna which extends to about AD1700 appears to lack a clear record. The Mount Everest core allows clean volcanic signal extraction and the core extends back to about AD700, slightly older than a previous flow model has suggested. The method may thus be used to extract historical volcanic records from a more diverse geographical range than hitherto. |
format |
Other/Unknown Material |
author |
Moore, John C Beaudon, Emilie Kang, Shichang Divine, Dmitry V Isaksson, Elisabeth Pohjola, Veijo A van de Wal, Roderik S W |
author_facet |
Moore, John C Beaudon, Emilie Kang, Shichang Divine, Dmitry V Isaksson, Elisabeth Pohjola, Veijo A van de Wal, Roderik S W |
author_sort |
Moore, John C |
title |
Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites |
title_short |
Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites |
title_full |
Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites |
title_fullStr |
Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites |
title_full_unstemmed |
Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites |
title_sort |
mean chemical characteristics and volcano signatures of ice cores from belukha, the everest and three svalbard sites |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.817167 https://doi.org/10.1594/PANGAEA.817167 |
op_coverage |
MEDIAN LATITUDE: 56.000200 * MEDIAN LONGITUDE: 49.623100 * SOUTH-BOUND LATITUDE: 28.030000 * WEST-BOUND LONGITUDE: 13.270000 * NORTH-BOUND LATITUDE: 79.970000 * EAST-BOUND LONGITUDE: 86.980000 * DATE/TIME START: 1995-01-01T00:00:00 * DATE/TIME END: 2005-01-01T00:00:00 |
long_lat |
ENVELOPE(13.270000,86.980000,79.970000,28.030000) |
genre |
Antarc* Antarctic Greenland ice core International Polar Year IPY Svalbard Vestfonna |
genre_facet |
Antarc* Antarctic Greenland ice core International Polar Year IPY Svalbard Vestfonna |
op_source |
Supplement to: Moore, John C; Beaudon, Emilie; Kang, Shichang; Divine, Dmitry V; Isaksson, Elisabeth; Pohjola, Veijo A; van de Wal, Roderik S W (2012): Statistical extraction of volcanic sulphate from nonpolar ice cores. Journal of Geophysical Research, 117(D3), D03306, https://doi.org/10.1029/2011JD016592 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.817167 https://doi.org/10.1594/PANGAEA.817167 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81716710.1029/2011JD016592 |
_version_ |
1810489794789113856 |