Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling?
The timing and causes of Common Era (CE) glacier growth in the Arctic Atlantic region remain elusive. There is mounting evidence of advances that predate the Little Ice Age (1250–1850 CE); this challenges the view that 13th century volcanic eruptions triggered change by spurring sea-ice expansion. R...
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Online Access: | https://hdl.handle.net/1956/21578 https://doi.org/10.1016/j.quascirev.2019.07.042 |
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ftunivbergen:oai:bora.uib.no:1956/21578 2023-05-15T14:56:07+02:00 Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? Haaga, Kristian Agasøster Bilt, Willem van der Born, Andreas 2019-10-30T20:47:06Z application/pdf https://hdl.handle.net/1956/21578 https://doi.org/10.1016/j.quascirev.2019.07.042 eng eng Elsevier Ltd. urn:issn:0277-3791 urn:issn:1873-457X https://hdl.handle.net/1956/21578 https://doi.org/10.1016/j.quascirev.2019.07.042 cristin:1713769 Attribution CC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2019 The Author(s) Quaternary Science Reviews Little Ice Age Late Holocene Threshold response Sea-ice feedbacks Neoglacial Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.1016/j.quascirev.2019.07.042 2023-03-14T17:42:41Z The timing and causes of Common Era (CE) glacier growth in the Arctic Atlantic region remain elusive. There is mounting evidence of advances that predate the Little Ice Age (1250–1850 CE); this challenges the view that 13th century volcanic eruptions triggered change by spurring sea-ice expansion. Recent climate model simulations indicate this response does not require external forcing under contemporaneous (Pre-Industrial) boundary conditions. Here, we try to reconcile these new insights by combining regional proxy evidence of glacier and sea-ice change with a climate model experiment. Collated recently published reconstructions demonstrate that regional climate shifted towards a colder mean state around 650–950 CE, a period marked by low radiative forcing. Unforced model simulations reproduce the time-transgressive evolution of this response, which emerged east of Greenland and progressed towards Svalbard. The inferred pattern is associated with sea-ice feedbacks, triggered by stochastic atmospheric cooling. We argue that this mechanism may explain the timing and pattern of CE glacier growth in the region. publishedVersion Article in Journal/Newspaper Arctic glacier glacier Greenland Sea ice Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Greenland Svalbard Quaternary Science Reviews 222 105860 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Little Ice Age Late Holocene Threshold response Sea-ice feedbacks Neoglacial |
spellingShingle |
Little Ice Age Late Holocene Threshold response Sea-ice feedbacks Neoglacial Haaga, Kristian Agasøster Bilt, Willem van der Born, Andreas Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? |
topic_facet |
Little Ice Age Late Holocene Threshold response Sea-ice feedbacks Neoglacial |
description |
The timing and causes of Common Era (CE) glacier growth in the Arctic Atlantic region remain elusive. There is mounting evidence of advances that predate the Little Ice Age (1250–1850 CE); this challenges the view that 13th century volcanic eruptions triggered change by spurring sea-ice expansion. Recent climate model simulations indicate this response does not require external forcing under contemporaneous (Pre-Industrial) boundary conditions. Here, we try to reconcile these new insights by combining regional proxy evidence of glacier and sea-ice change with a climate model experiment. Collated recently published reconstructions demonstrate that regional climate shifted towards a colder mean state around 650–950 CE, a period marked by low radiative forcing. Unforced model simulations reproduce the time-transgressive evolution of this response, which emerged east of Greenland and progressed towards Svalbard. The inferred pattern is associated with sea-ice feedbacks, triggered by stochastic atmospheric cooling. We argue that this mechanism may explain the timing and pattern of CE glacier growth in the region. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Haaga, Kristian Agasøster Bilt, Willem van der Born, Andreas |
author_facet |
Haaga, Kristian Agasøster Bilt, Willem van der Born, Andreas |
author_sort |
Haaga, Kristian Agasøster |
title |
Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? |
title_short |
Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? |
title_full |
Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? |
title_fullStr |
Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? |
title_full_unstemmed |
Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling? |
title_sort |
was common era glacier expansion in the arctic atlantic region triggered by unforced atmospheric cooling? |
publisher |
Elsevier Ltd. |
publishDate |
2019 |
url |
https://hdl.handle.net/1956/21578 https://doi.org/10.1016/j.quascirev.2019.07.042 |
geographic |
Arctic Greenland Svalbard |
geographic_facet |
Arctic Greenland Svalbard |
genre |
Arctic glacier glacier Greenland Sea ice Svalbard |
genre_facet |
Arctic glacier glacier Greenland Sea ice Svalbard |
op_source |
Quaternary Science Reviews |
op_relation |
urn:issn:0277-3791 urn:issn:1873-457X https://hdl.handle.net/1956/21578 https://doi.org/10.1016/j.quascirev.2019.07.042 cristin:1713769 |
op_rights |
Attribution CC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2019 The Author(s) |
op_doi |
https://doi.org/10.1016/j.quascirev.2019.07.042 |
container_title |
Quaternary Science Reviews |
container_volume |
222 |
container_start_page |
105860 |
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1766328156464087040 |