Climate variability in the subarctic area for the last 2 millennia
To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records f...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/233607 2024-01-07T09:41:36+01:00 Climate variability in the subarctic area for the last 2 millennia Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe deVernal, Anne Divine, Dmitri Werner, Jojannes P. Hormes, Anne Korhola, Atte Antero Linderholm, Hans W. Environmental Sciences Environmental Change Research Unit (ECRU) Helsinki Institute of Sustainability Science (HELSUS) 2018-03-20T10:33:01Z 16 application/pdf http://hdl.handle.net/10138/233607 eng eng COPERNICUS GESELLSCHAFT MBH 10.5194/cp-14-101-2018 Nicolle , M , Debret , M , Massei , N , Colin , C , deVernal , A , Divine , D , Werner , J P , Hormes , A , Korhola , A A & Linderholm , H W 2018 , ' Climate variability in the subarctic area for the last 2 millennia ' , Climate of the Past , vol. 14 , no. 1 , pp. 101-116 . https://doi.org/10.5194/cp-14-101-2018 85041229290 d8866ddc-90c9-44a9-a73f-8d51b0c63489 http://hdl.handle.net/10138/233607 000423404900002 cc_by openAccess info:eu-repo/semantics/openAccess 1171 Geosciences ATLANTIC MULTIDECADAL OSCILLATION PACIFIC DECADAL OSCILLATION TREE-RING CHRONOLOGIES ICE-AGE TEMPERATURE VARIABILITY SEA-ICE NORTHERN-HEMISPHERE PAST MILLENNIUM RECONSTRUCTION HOLOCENE Article publishedVersion 2018 ftunivhelsihelda 2023-12-14T00:08:54Z To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around AD 1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A similar to 16-30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas similar to 20-30- and similar to 50-90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice-temperature positive feedback. Peer reviewed Article in Journal/Newspaper Arctic Climate change North Atlantic Sea ice Subarctic Alaska Siberia HELDA – University of Helsinki Open Repository Arctic Pacific Climate of the Past 14 1 101 116 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
1171 Geosciences ATLANTIC MULTIDECADAL OSCILLATION PACIFIC DECADAL OSCILLATION TREE-RING CHRONOLOGIES ICE-AGE TEMPERATURE VARIABILITY SEA-ICE NORTHERN-HEMISPHERE PAST MILLENNIUM RECONSTRUCTION HOLOCENE |
spellingShingle |
1171 Geosciences ATLANTIC MULTIDECADAL OSCILLATION PACIFIC DECADAL OSCILLATION TREE-RING CHRONOLOGIES ICE-AGE TEMPERATURE VARIABILITY SEA-ICE NORTHERN-HEMISPHERE PAST MILLENNIUM RECONSTRUCTION HOLOCENE Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe deVernal, Anne Divine, Dmitri Werner, Jojannes P. Hormes, Anne Korhola, Atte Antero Linderholm, Hans W. Climate variability in the subarctic area for the last 2 millennia |
topic_facet |
1171 Geosciences ATLANTIC MULTIDECADAL OSCILLATION PACIFIC DECADAL OSCILLATION TREE-RING CHRONOLOGIES ICE-AGE TEMPERATURE VARIABILITY SEA-ICE NORTHERN-HEMISPHERE PAST MILLENNIUM RECONSTRUCTION HOLOCENE |
description |
To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around AD 1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A similar to 16-30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas similar to 20-30- and similar to 50-90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice-temperature positive feedback. Peer reviewed |
author2 |
Environmental Sciences Environmental Change Research Unit (ECRU) Helsinki Institute of Sustainability Science (HELSUS) |
format |
Article in Journal/Newspaper |
author |
Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe deVernal, Anne Divine, Dmitri Werner, Jojannes P. Hormes, Anne Korhola, Atte Antero Linderholm, Hans W. |
author_facet |
Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe deVernal, Anne Divine, Dmitri Werner, Jojannes P. Hormes, Anne Korhola, Atte Antero Linderholm, Hans W. |
author_sort |
Nicolle, Marie |
title |
Climate variability in the subarctic area for the last 2 millennia |
title_short |
Climate variability in the subarctic area for the last 2 millennia |
title_full |
Climate variability in the subarctic area for the last 2 millennia |
title_fullStr |
Climate variability in the subarctic area for the last 2 millennia |
title_full_unstemmed |
Climate variability in the subarctic area for the last 2 millennia |
title_sort |
climate variability in the subarctic area for the last 2 millennia |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2018 |
url |
http://hdl.handle.net/10138/233607 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Climate change North Atlantic Sea ice Subarctic Alaska Siberia |
genre_facet |
Arctic Climate change North Atlantic Sea ice Subarctic Alaska Siberia |
op_relation |
10.5194/cp-14-101-2018 Nicolle , M , Debret , M , Massei , N , Colin , C , deVernal , A , Divine , D , Werner , J P , Hormes , A , Korhola , A A & Linderholm , H W 2018 , ' Climate variability in the subarctic area for the last 2 millennia ' , Climate of the Past , vol. 14 , no. 1 , pp. 101-116 . https://doi.org/10.5194/cp-14-101-2018 85041229290 d8866ddc-90c9-44a9-a73f-8d51b0c63489 http://hdl.handle.net/10138/233607 000423404900002 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
1 |
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101 |
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