Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record
Increasing paleoclimatic evidence suggests that the Little Ice Age (LIA) was a global climate change event. Understanding the forcings and associated climate system feedbacks of the LIA is made difficult by the scarcity of Southern Hemisphere paleoclimate records. We use a new glaciochemical record...
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Language: | English |
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Copernicus Publications
2012
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00024958 2023-05-15T13:36:44+02:00 Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record Rhodes, R. H. Bertler, N. A. N. Baker, J. A. Steen-Larsen, H. C. Sneed, S. B. Morgenstern, U. Johnsen, S. J. 2012-07 electronic https://doi.org/10.5194/cp-8-1223-2012 https://noa.gwlb.de/receive/cop_mods_00024958 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024913/cp-8-1223-2012.pdf https://cp.copernicus.org/articles/8/1223/2012/cp-8-1223-2012.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-8-1223-2012 https://noa.gwlb.de/receive/cop_mods_00024958 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024913/cp-8-1223-2012.pdf https://cp.copernicus.org/articles/8/1223/2012/cp-8-1223-2012.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2012 ftnonlinearchiv https://doi.org/10.5194/cp-8-1223-2012 2022-02-08T22:49:56Z Increasing paleoclimatic evidence suggests that the Little Ice Age (LIA) was a global climate change event. Understanding the forcings and associated climate system feedbacks of the LIA is made difficult by the scarcity of Southern Hemisphere paleoclimate records. We use a new glaciochemical record of a coastal ice core from Mt. Erebus Saddle, Antarctica, to reconstruct atmospheric and oceanic conditions in the Ross Sea sector of Antarctica over the past five centuries. The LIA is identified in stable isotope (δD) and lithophile element records, which respectively demonstrate that the region experienced 1.6 ± 1.4 °C cooler average temperatures prior to 1850 AD than during the last 150 yr and strong (>57 m s−1) prevailing katabatic winds between 1500 and 1800 AD. Al and Ti concentration increases of an order of magnitude (>120 ppb Al) are linked to enhanced aeolian transport of complex silicate minerals and represent the strongest katabatic wind events of the LIA. These events are associated with three 12–30 yr intervals of cooler temperatures at ca. 1690 AD, 1770 AD and 1840 AD. Furthermore, ice core concentrations of the biogenic sulphur species MS− suggest that biological productivity in the Ross Sea polynya was ~80% higher prior to 1875 AD than at any subsequent time. We propose that cooler Antarctic temperatures promoted stronger katabatic winds across the Ross Ice Shelf, resulting in an enlarged Ross Sea polynya during the LIA. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Shelf Ross Ice Shelf Ross Sea Niedersächsisches Online-Archiv NOA Antarctic Ross Ice Shelf Ross Sea Climate of the Past 8 4 1223 1238 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Rhodes, R. H. Bertler, N. A. N. Baker, J. A. Steen-Larsen, H. C. Sneed, S. B. Morgenstern, U. Johnsen, S. J. Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record |
topic_facet |
article Verlagsveröffentlichung |
description |
Increasing paleoclimatic evidence suggests that the Little Ice Age (LIA) was a global climate change event. Understanding the forcings and associated climate system feedbacks of the LIA is made difficult by the scarcity of Southern Hemisphere paleoclimate records. We use a new glaciochemical record of a coastal ice core from Mt. Erebus Saddle, Antarctica, to reconstruct atmospheric and oceanic conditions in the Ross Sea sector of Antarctica over the past five centuries. The LIA is identified in stable isotope (δD) and lithophile element records, which respectively demonstrate that the region experienced 1.6 ± 1.4 °C cooler average temperatures prior to 1850 AD than during the last 150 yr and strong (>57 m s−1) prevailing katabatic winds between 1500 and 1800 AD. Al and Ti concentration increases of an order of magnitude (>120 ppb Al) are linked to enhanced aeolian transport of complex silicate minerals and represent the strongest katabatic wind events of the LIA. These events are associated with three 12–30 yr intervals of cooler temperatures at ca. 1690 AD, 1770 AD and 1840 AD. Furthermore, ice core concentrations of the biogenic sulphur species MS− suggest that biological productivity in the Ross Sea polynya was ~80% higher prior to 1875 AD than at any subsequent time. We propose that cooler Antarctic temperatures promoted stronger katabatic winds across the Ross Ice Shelf, resulting in an enlarged Ross Sea polynya during the LIA. |
format |
Article in Journal/Newspaper |
author |
Rhodes, R. H. Bertler, N. A. N. Baker, J. A. Steen-Larsen, H. C. Sneed, S. B. Morgenstern, U. Johnsen, S. J. |
author_facet |
Rhodes, R. H. Bertler, N. A. N. Baker, J. A. Steen-Larsen, H. C. Sneed, S. B. Morgenstern, U. Johnsen, S. J. |
author_sort |
Rhodes, R. H. |
title |
Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record |
title_short |
Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record |
title_full |
Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record |
title_fullStr |
Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record |
title_full_unstemmed |
Little Ice Age climate and oceanic conditions of the Ross Sea, Antarctica from a coastal ice core record |
title_sort |
little ice age climate and oceanic conditions of the ross sea, antarctica from a coastal ice core record |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1223-2012 https://noa.gwlb.de/receive/cop_mods_00024958 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024913/cp-8-1223-2012.pdf https://cp.copernicus.org/articles/8/1223/2012/cp-8-1223-2012.pdf |
geographic |
Antarctic Ross Ice Shelf Ross Sea |
geographic_facet |
Antarctic Ross Ice Shelf Ross Sea |
genre |
Antarc* Antarctic Antarctica ice core Ice Shelf Ross Ice Shelf Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Shelf Ross Ice Shelf Ross Sea |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-8-1223-2012 https://noa.gwlb.de/receive/cop_mods_00024958 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024913/cp-8-1223-2012.pdf https://cp.copernicus.org/articles/8/1223/2012/cp-8-1223-2012.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-8-1223-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
4 |
container_start_page |
1223 |
op_container_end_page |
1238 |
_version_ |
1766083301039144960 |