Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model
The Holocene climate is simulated in a 9000-yr-long transient experiment performed with the ECBilt-CLIO-VECODE coupled atmosphere-sea ice-ocean-vegetation model. This experiment is forced with annually varying orbital parameters and atmospheric concentrations of CO 2 and CH 4 . The objective is to s...
Published in: | The Holocene |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2005
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1191/0959683605hl869ra http://journals.sagepub.com/doi/pdf/10.1191/0959683605hl869ra |
id |
crsagepubl:10.1191/0959683605hl869ra |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1191/0959683605hl869ra 2024-05-19T07:48:19+00:00 Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model Renssen, Hans Goosse, Hugues Fichefet, Thierry Masson-Delmotte, Valérie Koç, Nalan 2005 http://dx.doi.org/10.1191/0959683605hl869ra http://journals.sagepub.com/doi/pdf/10.1191/0959683605hl869ra en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 15, issue 7, page 951-964 ISSN 0959-6836 1477-0911 journal-article 2005 crsagepubl https://doi.org/10.1191/0959683605hl869ra 2024-04-25T08:13:26Z The Holocene climate is simulated in a 9000-yr-long transient experiment performed with the ECBilt-CLIO-VECODE coupled atmosphere-sea ice-ocean-vegetation model. This experiment is forced with annually varying orbital parameters and atmospheric concentrations of CO 2 and CH 4 . The objective is to study the impact of these long-term forcings on the surface temperature evolution during different seasons in the high-latitude Southern Hemisphere. We find in summer a thermal optimum in the midHolocene (6-3 ka BP), with temperatures locally 3°C above the preindustrial mean. In autumn the temperatures experienced a long-term increase, particularly during the first few thousand years. The opposite trend was simulated for winter and spring, with a relatively warm Southern Ocean at 9 ka BP in winter (up to 3.5°C above the preindustrial mean) and a warm continent in spring (+3°C), followed by a gradual cooling towards the present. These long-term temperature trends can be explained by a combination of (1) a delayed response to orbital forcing, with temperatures lagging insolation by 1 to 2 months owing to the thermal inertia of the system, and (2) the long memory of the Southern Ocean. This long memory is related to the storage of the warm late winter-spring anomaly below the shallower summer mixed layer until next winter. Sea ice plays an important role as an amplifying factor through the ice-albedo and ice-insulation feedbacks. Our experiments can help to improve our understanding of the Holocene signal in proxies. For instance, the results suggest that, in contrast to recent propositions, teleconnections to the Northern Hemisphere appear not necessarily to explain the history of Southern Hemisphere temperature changes during the Holocene. Article in Journal/Newspaper Sea ice Southern Ocean SAGE Publications The Holocene 15 7 951 964 |
institution |
Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
description |
The Holocene climate is simulated in a 9000-yr-long transient experiment performed with the ECBilt-CLIO-VECODE coupled atmosphere-sea ice-ocean-vegetation model. This experiment is forced with annually varying orbital parameters and atmospheric concentrations of CO 2 and CH 4 . The objective is to study the impact of these long-term forcings on the surface temperature evolution during different seasons in the high-latitude Southern Hemisphere. We find in summer a thermal optimum in the midHolocene (6-3 ka BP), with temperatures locally 3°C above the preindustrial mean. In autumn the temperatures experienced a long-term increase, particularly during the first few thousand years. The opposite trend was simulated for winter and spring, with a relatively warm Southern Ocean at 9 ka BP in winter (up to 3.5°C above the preindustrial mean) and a warm continent in spring (+3°C), followed by a gradual cooling towards the present. These long-term temperature trends can be explained by a combination of (1) a delayed response to orbital forcing, with temperatures lagging insolation by 1 to 2 months owing to the thermal inertia of the system, and (2) the long memory of the Southern Ocean. This long memory is related to the storage of the warm late winter-spring anomaly below the shallower summer mixed layer until next winter. Sea ice plays an important role as an amplifying factor through the ice-albedo and ice-insulation feedbacks. Our experiments can help to improve our understanding of the Holocene signal in proxies. For instance, the results suggest that, in contrast to recent propositions, teleconnections to the Northern Hemisphere appear not necessarily to explain the history of Southern Hemisphere temperature changes during the Holocene. |
format |
Article in Journal/Newspaper |
author |
Renssen, Hans Goosse, Hugues Fichefet, Thierry Masson-Delmotte, Valérie Koç, Nalan |
spellingShingle |
Renssen, Hans Goosse, Hugues Fichefet, Thierry Masson-Delmotte, Valérie Koç, Nalan Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
author_facet |
Renssen, Hans Goosse, Hugues Fichefet, Thierry Masson-Delmotte, Valérie Koç, Nalan |
author_sort |
Renssen, Hans |
title |
Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
title_short |
Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
title_full |
Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
title_fullStr |
Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
title_full_unstemmed |
Holocene climate evolution in the high-latitude Southern Hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
title_sort |
holocene climate evolution in the high-latitude southern hemisphere simulated by a coupled atmosphere-sea ice-ocean-vegetation model |
publisher |
SAGE Publications |
publishDate |
2005 |
url |
http://dx.doi.org/10.1191/0959683605hl869ra http://journals.sagepub.com/doi/pdf/10.1191/0959683605hl869ra |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
The Holocene volume 15, issue 7, page 951-964 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1191/0959683605hl869ra |
container_title |
The Holocene |
container_volume |
15 |
container_issue |
7 |
container_start_page |
951 |
op_container_end_page |
964 |
_version_ |
1799488865250050048 |