Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period
Five basaltic tephra horizons have been identified in the NGRIP ice-core during the last glacial period. Geochemical analyses indicate that these tephras are of Icelandic origin with one horizon identified as the Faroe Marine Ash Zone III (FMAZ III) - an important marker horizon in several marine re...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | http://hdl.handle.net/10278/27468 https://doi.org/10.1016/j.epsl.2010.03.004 |
id |
ftuniveneziairis:oai:iris.unive.it:10278/27468 |
---|---|
record_format |
openpolar |
spelling |
ftuniveneziairis:oai:iris.unive.it:10278/27468 2024-04-21T08:01:50+00:00 Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period Davies S. M. Wastegaard, S. Abbott P. M. Bigler M. Johnsen S. J. Rasmussen T. L. Steffensen J. P. Svensson A. BARBANTE, Carlo Davies, S. M. Wastegaard, S. Abbott, P. M. Barbante, Carlo Bigler, M. Johnsen, S. J. Rasmussen, T. L. Steffensen, J. P. Svensson, A. 2010 http://hdl.handle.net/10278/27468 https://doi.org/10.1016/j.epsl.2010.03.004 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000278506200008 volume:294(1-2) firstpage:69 lastpage:79 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/10278/27468 doi:10.1016/j.epsl.2010.03.004 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77952289051 info:eu-repo/semantics/closedAccess Faroe Marine Ash Zone III Greenland ice-core Last glacial period Rapid climate change Tephra horizon info:eu-repo/semantics/article 2010 ftuniveneziairis https://doi.org/10.1016/j.epsl.2010.03.004 2024-03-28T01:23:12Z Five basaltic tephra horizons have been identified in the NGRIP ice-core during the last glacial period. Geochemical analyses indicate that these tephras are of Icelandic origin with one horizon identified as the Faroe Marine Ash Zone III (FMAZ III) - an important marker horizon in several marine records within the Faroe Islands margin. The FMAZ III is a few millimetres thick and is constrained to 38, 122 ± 723 yr b2k (before year AD 2000) according to the Greenland Ice Core Chronology (GICC05). This event falls directly at the thermal peak of Greenland Interstadial 8 (GI-8) and a marine-ice correlation, based on the position of this tephra, suggests a close coupling of the marine and atmospheric systems at this time. The remaining tephras originate from the Eastern Volcanic Zone with the Katla volcanic system pinpointed as the dominant source. These are thought to represent previously unknown volcanic events which add considerably to our knowledge of Icelandic volcanism during this period. Independent ages are assigned to these events and together with major element characterisation, form the backbone of the tephrochronology framework presented here. Despite the identification of these tephras, this study also demonstrates that the sulphate record may not always act as a suitable proxy for the identification of tephra horizons in ice-core records. © 2010 Elsevier B.V. Article in Journal/Newspaper Faroe Islands Greenland Greenland ice core ice core Katla NGRIP North Atlantic Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Earth and Planetary Science Letters 294 1-2 69 79 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Faroe Marine Ash Zone III Greenland ice-core Last glacial period Rapid climate change Tephra horizon |
spellingShingle |
Faroe Marine Ash Zone III Greenland ice-core Last glacial period Rapid climate change Tephra horizon Davies S. M. Wastegaard, S. Abbott P. M. Bigler M. Johnsen S. J. Rasmussen T. L. Steffensen J. P. Svensson A. BARBANTE, Carlo Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period |
topic_facet |
Faroe Marine Ash Zone III Greenland ice-core Last glacial period Rapid climate change Tephra horizon |
description |
Five basaltic tephra horizons have been identified in the NGRIP ice-core during the last glacial period. Geochemical analyses indicate that these tephras are of Icelandic origin with one horizon identified as the Faroe Marine Ash Zone III (FMAZ III) - an important marker horizon in several marine records within the Faroe Islands margin. The FMAZ III is a few millimetres thick and is constrained to 38, 122 ± 723 yr b2k (before year AD 2000) according to the Greenland Ice Core Chronology (GICC05). This event falls directly at the thermal peak of Greenland Interstadial 8 (GI-8) and a marine-ice correlation, based on the position of this tephra, suggests a close coupling of the marine and atmospheric systems at this time. The remaining tephras originate from the Eastern Volcanic Zone with the Katla volcanic system pinpointed as the dominant source. These are thought to represent previously unknown volcanic events which add considerably to our knowledge of Icelandic volcanism during this period. Independent ages are assigned to these events and together with major element characterisation, form the backbone of the tephrochronology framework presented here. Despite the identification of these tephras, this study also demonstrates that the sulphate record may not always act as a suitable proxy for the identification of tephra horizons in ice-core records. © 2010 Elsevier B.V. |
author2 |
Davies, S. M. Wastegaard, S. Abbott, P. M. Barbante, Carlo Bigler, M. Johnsen, S. J. Rasmussen, T. L. Steffensen, J. P. Svensson, A. |
format |
Article in Journal/Newspaper |
author |
Davies S. M. Wastegaard, S. Abbott P. M. Bigler M. Johnsen S. J. Rasmussen T. L. Steffensen J. P. Svensson A. BARBANTE, Carlo |
author_facet |
Davies S. M. Wastegaard, S. Abbott P. M. Bigler M. Johnsen S. J. Rasmussen T. L. Steffensen J. P. Svensson A. BARBANTE, Carlo |
author_sort |
Davies S. M. |
title |
Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period |
title_short |
Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period |
title_full |
Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period |
title_fullStr |
Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period |
title_full_unstemmed |
Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period |
title_sort |
tracing volcanic events in the ngrip ice-core and synchronising north atlantic marine records during the last glacial period |
publishDate |
2010 |
url |
http://hdl.handle.net/10278/27468 https://doi.org/10.1016/j.epsl.2010.03.004 |
genre |
Faroe Islands Greenland Greenland ice core ice core Katla NGRIP North Atlantic |
genre_facet |
Faroe Islands Greenland Greenland ice core ice core Katla NGRIP North Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000278506200008 volume:294(1-2) firstpage:69 lastpage:79 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/10278/27468 doi:10.1016/j.epsl.2010.03.004 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77952289051 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2010.03.004 |
container_title |
Earth and Planetary Science Letters |
container_volume |
294 |
container_issue |
1-2 |
container_start_page |
69 |
op_container_end_page |
79 |
_version_ |
1796941931085824000 |