Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons
ABSTRACT Large uncertainties exist in Holocene climate estimates, especially for the early Holocene when large‐scale reorganization occurred in the climate system. To improve our understanding of these uncertainties, we compare four Holocene simulations performed with the LOVECLIM, CCSM3, HadCM3 and...
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crwiley:10.1002/jqs.3027 2024-09-15T17:35:59+00:00 Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons Zhang, Yurui Renssen, Hans Seppä, Heikki Valdes, Paul J. China Scholarship Council 2018 http://dx.doi.org/10.1002/jqs.3027 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3027 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3027 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 33, issue 4, page 464-476 ISSN 0267-8179 1099-1417 journal-article 2018 crwiley https://doi.org/10.1002/jqs.3027 2024-08-27T04:32:36Z ABSTRACT Large uncertainties exist in Holocene climate estimates, especially for the early Holocene when large‐scale reorganization occurred in the climate system. To improve our understanding of these uncertainties, we compare four Holocene simulations performed with the LOVECLIM, CCSM3, HadCM3 and FAMOUS climate models. The simulations are generally consistent for the large‐scale Northern Hemisphere extratropics, while the multi‐simulation consistencies are heterogeneous on the sub‐continental scale. Consistently simulated temperature trends are found in Greenland, northern Canada, north‐eastern and north‐western Europe, and central‐west Siberia. These Holocene temperatures show a pattern of an early Holocene warming, mid‐Holocene warmth and gradual decrease towards the pre‐industrial in winter, and the extent of early Holocene warming varies spatially, with 9 °C warming in northern Canada compared with 3 °C warming in central‐west Siberia. In contrast, mismatched temperatures are detected: in Alaska, the warm early Holocene winter in LOVECLIM primarily results from strongly enhanced southerly winds induced by the ice sheets; in eastern Siberia, the intense early‐Holocene summer warmth anomaly in CCSM3 is caused by large negative albedo anomalies due to overestimated snow cover at 0 ka; in the Arctic, cool winter conditons in FAMOUS can be attributed to extensive sea ice coverage probably due to simplified sea ice representations. Thus, the Holocene temperature trends in these regions remain inconclusive. Article in Journal/Newspaper albedo Greenland Sea ice Alaska Siberia Wiley Online Library Journal of Quaternary Science 33 4 464 476 |
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Wiley Online Library |
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English |
description |
ABSTRACT Large uncertainties exist in Holocene climate estimates, especially for the early Holocene when large‐scale reorganization occurred in the climate system. To improve our understanding of these uncertainties, we compare four Holocene simulations performed with the LOVECLIM, CCSM3, HadCM3 and FAMOUS climate models. The simulations are generally consistent for the large‐scale Northern Hemisphere extratropics, while the multi‐simulation consistencies are heterogeneous on the sub‐continental scale. Consistently simulated temperature trends are found in Greenland, northern Canada, north‐eastern and north‐western Europe, and central‐west Siberia. These Holocene temperatures show a pattern of an early Holocene warming, mid‐Holocene warmth and gradual decrease towards the pre‐industrial in winter, and the extent of early Holocene warming varies spatially, with 9 °C warming in northern Canada compared with 3 °C warming in central‐west Siberia. In contrast, mismatched temperatures are detected: in Alaska, the warm early Holocene winter in LOVECLIM primarily results from strongly enhanced southerly winds induced by the ice sheets; in eastern Siberia, the intense early‐Holocene summer warmth anomaly in CCSM3 is caused by large negative albedo anomalies due to overestimated snow cover at 0 ka; in the Arctic, cool winter conditons in FAMOUS can be attributed to extensive sea ice coverage probably due to simplified sea ice representations. Thus, the Holocene temperature trends in these regions remain inconclusive. |
author2 |
China Scholarship Council |
format |
Article in Journal/Newspaper |
author |
Zhang, Yurui Renssen, Hans Seppä, Heikki Valdes, Paul J. |
spellingShingle |
Zhang, Yurui Renssen, Hans Seppä, Heikki Valdes, Paul J. Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons |
author_facet |
Zhang, Yurui Renssen, Hans Seppä, Heikki Valdes, Paul J. |
author_sort |
Zhang, Yurui |
title |
Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons |
title_short |
Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons |
title_full |
Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons |
title_fullStr |
Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons |
title_full_unstemmed |
Holocene temperature trends in the extratropical Northern Hemisphere based on inter‐model comparisons |
title_sort |
holocene temperature trends in the extratropical northern hemisphere based on inter‐model comparisons |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jqs.3027 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3027 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3027 |
genre |
albedo Greenland Sea ice Alaska Siberia |
genre_facet |
albedo Greenland Sea ice Alaska Siberia |
op_source |
Journal of Quaternary Science volume 33, issue 4, page 464-476 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.3027 |
container_title |
Journal of Quaternary Science |
container_volume |
33 |
container_issue |
4 |
container_start_page |
464 |
op_container_end_page |
476 |
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1810486550115385344 |