Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya)
Understanding recent Arctic climate change requires detailed information on past changes, in particular on a regional scale. The extension of the depth–age relation of the Akademii Nauk (AN) ice core from Severnaya Zemlya (SZ) to the last 1100 yr provides new perspectives on past climate fluctuation...
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Online Access: | https://doi.org/10.5194/cp-9-2379-2013 https://cp.copernicus.org/articles/9/2379/2013/ |
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ftcopernicus:oai:publications.copernicus.org:cp19969 2023-05-15T14:50:25+02:00 Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) Opel, T. Fritzsche, D. Meyer, H. 2018-09-27 application/pdf https://doi.org/10.5194/cp-9-2379-2013 https://cp.copernicus.org/articles/9/2379/2013/ eng eng doi:10.5194/cp-9-2379-2013 https://cp.copernicus.org/articles/9/2379/2013/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-9-2379-2013 2020-07-20T16:25:18Z Understanding recent Arctic climate change requires detailed information on past changes, in particular on a regional scale. The extension of the depth–age relation of the Akademii Nauk (AN) ice core from Severnaya Zemlya (SZ) to the last 1100 yr provides new perspectives on past climate fluctuations in the Barents and Kara seas region. Here, we present the easternmost high-resolution ice-core climate proxy records (δ 18 O and sodium) from the Arctic. Multi-annual AN δ 18 O data as near-surface air-temperature proxies reveal major temperature changes over the last millennium, including the absolute minimum around 1800 and the unprecedented warming to a double-peak maximum in the early 20th century. The long-term cooling trend in δ 18 O is related to a decline in summer insolation but also to the growth of the AN ice cap as indicated by decreasing sodium concentrations. Neither a pronounced Medieval Climate Anomaly nor a Little Ice Age are detectable in the AN δ 18 O record. In contrast, there is evidence of several abrupt warming and cooling events, such as in the 15th and 16th centuries, partly accompanied by corresponding changes in sodium concentrations. These abrupt changes are assumed to be related to sea-ice cover variability in the Barents and Kara seas region, which might be caused by shifts in atmospheric circulation patterns. Our results indicate a significant impact of internal climate variability on Arctic climate change in the last millennium. Text Arctic Climate change Ice cap ice core Sea ice Severnaya Zemlya Copernicus Publications: E-Journals Arctic Severnaya Zemlya ENVELOPE(98.000,98.000,79.500,79.500) Climate of the Past 9 5 2379 2389 |
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Copernicus Publications: E-Journals |
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English |
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Understanding recent Arctic climate change requires detailed information on past changes, in particular on a regional scale. The extension of the depth–age relation of the Akademii Nauk (AN) ice core from Severnaya Zemlya (SZ) to the last 1100 yr provides new perspectives on past climate fluctuations in the Barents and Kara seas region. Here, we present the easternmost high-resolution ice-core climate proxy records (δ 18 O and sodium) from the Arctic. Multi-annual AN δ 18 O data as near-surface air-temperature proxies reveal major temperature changes over the last millennium, including the absolute minimum around 1800 and the unprecedented warming to a double-peak maximum in the early 20th century. The long-term cooling trend in δ 18 O is related to a decline in summer insolation but also to the growth of the AN ice cap as indicated by decreasing sodium concentrations. Neither a pronounced Medieval Climate Anomaly nor a Little Ice Age are detectable in the AN δ 18 O record. In contrast, there is evidence of several abrupt warming and cooling events, such as in the 15th and 16th centuries, partly accompanied by corresponding changes in sodium concentrations. These abrupt changes are assumed to be related to sea-ice cover variability in the Barents and Kara seas region, which might be caused by shifts in atmospheric circulation patterns. Our results indicate a significant impact of internal climate variability on Arctic climate change in the last millennium. |
format |
Text |
author |
Opel, T. Fritzsche, D. Meyer, H. |
spellingShingle |
Opel, T. Fritzsche, D. Meyer, H. Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) |
author_facet |
Opel, T. Fritzsche, D. Meyer, H. |
author_sort |
Opel, T. |
title |
Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) |
title_short |
Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) |
title_full |
Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) |
title_fullStr |
Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) |
title_full_unstemmed |
Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya) |
title_sort |
eurasian arctic climate over the past millennium as recorded in the akademii nauk ice core (severnaya zemlya) |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-9-2379-2013 https://cp.copernicus.org/articles/9/2379/2013/ |
long_lat |
ENVELOPE(98.000,98.000,79.500,79.500) |
geographic |
Arctic Severnaya Zemlya |
geographic_facet |
Arctic Severnaya Zemlya |
genre |
Arctic Climate change Ice cap ice core Sea ice Severnaya Zemlya |
genre_facet |
Arctic Climate change Ice cap ice core Sea ice Severnaya Zemlya |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-9-2379-2013 https://cp.copernicus.org/articles/9/2379/2013/ |
op_doi |
https://doi.org/10.5194/cp-9-2379-2013 |
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Climate of the Past |
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9 |
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5 |
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2379 |
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2389 |
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1766321451179180032 |