On the origin of the 100-kyr cycles in the astronomical forcing
[1] Investigations during the last 25 years have demonstrated that the astronomically related 19-, 23-, and 41-kyr quasiperiodicities actually occur in long records of the Quaternary climate. However, the same investigations also identified the largest climatic cycle as being about 100 kyr long. As...
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Amer Geophysical Union
2005
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Online Access: | http://hdl.handle.net/2078.1/38738 https://doi.org/10.1029/2005PA001173 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:38738 2024-05-12T07:55:58+00:00 On the origin of the 100-kyr cycles in the astronomical forcing Berger, André Melice, JL. Loutre, Marie-France UCL - SC/PHYS - Département de physique 2005 http://hdl.handle.net/2078.1/38738 https://doi.org/10.1029/2005PA001173 eng eng Amer Geophysical Union boreal:38738 http://hdl.handle.net/2078.1/38738 doi:10.1029/2005PA001173 urn:ISSN:0883-8305 urn:EISSN:1944-9186 Paleoceanography, Vol. 20, no. 4 (2005) info:eu-repo/semantics/article 2005 ftunistlouisbrus https://doi.org/10.1029/2005PA001173 2024-04-18T18:15:11Z [1] Investigations during the last 25 years have demonstrated that the astronomically related 19-, 23-, and 41-kyr quasiperiodicities actually occur in long records of the Quaternary climate. However, the same investigations also identified the largest climatic cycle as being about 100 kyr long. As the 100-kyr variations in standing insolation due to eccentricity change are too small, they cannot be the direct cause of the ice ages. This is the reason why most of the modeling studies attempting to explain the relation between the astronomical forcing and climatic change have focused on this 100-kyr cycle. In this paper, we will show the astronomical origin of the periods at about 100 kyr that characterize the long-term variations of eccentricity, of its first derivative, of the frequency modulation of obliquity, and of the inclination of the Earth's orbit on the invariable plane of reference. Five independent values are found between 95 and 107 kyr, and a wavelet signature is suggested to test the possible relationships between the astronomical and climatic variables. Proxy records from deep-sea cores and European Programme for Ice Coring in Antarctica ice core and modeling results from the Louvain-la-Neuve two-dimensional model are used for illustration. Article in Journal/Newspaper Antarc* Antarctica ice core DIAL@USL-B (Université Saint-Louis, Bruxelles) Paleoceanography 20 4 n/a n/a |
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Open Polar |
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DIAL@USL-B (Université Saint-Louis, Bruxelles) |
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ftunistlouisbrus |
language |
English |
description |
[1] Investigations during the last 25 years have demonstrated that the astronomically related 19-, 23-, and 41-kyr quasiperiodicities actually occur in long records of the Quaternary climate. However, the same investigations also identified the largest climatic cycle as being about 100 kyr long. As the 100-kyr variations in standing insolation due to eccentricity change are too small, they cannot be the direct cause of the ice ages. This is the reason why most of the modeling studies attempting to explain the relation between the astronomical forcing and climatic change have focused on this 100-kyr cycle. In this paper, we will show the astronomical origin of the periods at about 100 kyr that characterize the long-term variations of eccentricity, of its first derivative, of the frequency modulation of obliquity, and of the inclination of the Earth's orbit on the invariable plane of reference. Five independent values are found between 95 and 107 kyr, and a wavelet signature is suggested to test the possible relationships between the astronomical and climatic variables. Proxy records from deep-sea cores and European Programme for Ice Coring in Antarctica ice core and modeling results from the Louvain-la-Neuve two-dimensional model are used for illustration. |
author2 |
UCL - SC/PHYS - Département de physique |
format |
Article in Journal/Newspaper |
author |
Berger, André Melice, JL. Loutre, Marie-France |
spellingShingle |
Berger, André Melice, JL. Loutre, Marie-France On the origin of the 100-kyr cycles in the astronomical forcing |
author_facet |
Berger, André Melice, JL. Loutre, Marie-France |
author_sort |
Berger, André |
title |
On the origin of the 100-kyr cycles in the astronomical forcing |
title_short |
On the origin of the 100-kyr cycles in the astronomical forcing |
title_full |
On the origin of the 100-kyr cycles in the astronomical forcing |
title_fullStr |
On the origin of the 100-kyr cycles in the astronomical forcing |
title_full_unstemmed |
On the origin of the 100-kyr cycles in the astronomical forcing |
title_sort |
on the origin of the 100-kyr cycles in the astronomical forcing |
publisher |
Amer Geophysical Union |
publishDate |
2005 |
url |
http://hdl.handle.net/2078.1/38738 https://doi.org/10.1029/2005PA001173 |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_source |
Paleoceanography, Vol. 20, no. 4 (2005) |
op_relation |
boreal:38738 http://hdl.handle.net/2078.1/38738 doi:10.1029/2005PA001173 urn:ISSN:0883-8305 urn:EISSN:1944-9186 |
op_doi |
https://doi.org/10.1029/2005PA001173 |
container_title |
Paleoceanography |
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20 |
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4 |
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1798835854682095616 |