A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records
Spectral analyses performed on records of cosmogenic nuclides reveal a group of dominant spectral components during the Holocene period. Only a few of them are related to known solar cycles, i.e., the De Vries/Suess, Gleissberg and Hallstatt cycles. The origin of the others remains uncertain. On the...
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ftcopernicus:oai:publications.copernicus.org:npg7959 2023-05-15T16:29:26+02:00 A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records Quiroga Lombard, C. S. Balenzuela, P. Braun, H. Chialvo, D. R. 2018-01-15 application/pdf https://doi.org/10.5194/npg-17-585-2010 https://npg.copernicus.org/articles/17/585/2010/ eng eng doi:10.5194/npg-17-585-2010 https://npg.copernicus.org/articles/17/585/2010/ eISSN: 1607-7946 Text 2018 ftcopernicus https://doi.org/10.5194/npg-17-585-2010 2020-07-20T16:26:18Z Spectral analyses performed on records of cosmogenic nuclides reveal a group of dominant spectral components during the Holocene period. Only a few of them are related to known solar cycles, i.e., the De Vries/Suess, Gleissberg and Hallstatt cycles. The origin of the others remains uncertain. On the other hand, time series of North Atlantic atmospheric/sea surface temperatures during the last ice age display the existence of repeated large-scale warming events, called Dansgaard-Oeschger (DO) events, spaced around multiples of 1470 years. The De Vries/Suess and Gleissberg cycles with periods close to 1470/7 (~210) and 1470/17 (~86.5) years have been proposed to explain these observations. In this work we found that a conceptual bistable model forced with the De Vries/Suess and Gleissberg cycles plus noise displays a group of dominant frequencies similar to those obtained in the Fourier spectra from paleo-climate during the Holocene. Moreover, we show that simply changing the noise amplitude in the model we obtain similar power spectra to those corresponding to GISP2 δ 18 O (Greenland Ice Sheet Project 2) during the last ice age. These results give a general dynamical framework which allows us to interpret the main characteristic of paleoclimate records from the last 100 000 years. Text Greenland Greenland Ice Sheet Project Ice Sheet North Atlantic Copernicus Publications: E-Journals Greenland Nonlinear Processes in Geophysics 17 5 585 592 |
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Copernicus Publications: E-Journals |
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English |
description |
Spectral analyses performed on records of cosmogenic nuclides reveal a group of dominant spectral components during the Holocene period. Only a few of them are related to known solar cycles, i.e., the De Vries/Suess, Gleissberg and Hallstatt cycles. The origin of the others remains uncertain. On the other hand, time series of North Atlantic atmospheric/sea surface temperatures during the last ice age display the existence of repeated large-scale warming events, called Dansgaard-Oeschger (DO) events, spaced around multiples of 1470 years. The De Vries/Suess and Gleissberg cycles with periods close to 1470/7 (~210) and 1470/17 (~86.5) years have been proposed to explain these observations. In this work we found that a conceptual bistable model forced with the De Vries/Suess and Gleissberg cycles plus noise displays a group of dominant frequencies similar to those obtained in the Fourier spectra from paleo-climate during the Holocene. Moreover, we show that simply changing the noise amplitude in the model we obtain similar power spectra to those corresponding to GISP2 δ 18 O (Greenland Ice Sheet Project 2) during the last ice age. These results give a general dynamical framework which allows us to interpret the main characteristic of paleoclimate records from the last 100 000 years. |
format |
Text |
author |
Quiroga Lombard, C. S. Balenzuela, P. Braun, H. Chialvo, D. R. |
spellingShingle |
Quiroga Lombard, C. S. Balenzuela, P. Braun, H. Chialvo, D. R. A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
author_facet |
Quiroga Lombard, C. S. Balenzuela, P. Braun, H. Chialvo, D. R. |
author_sort |
Quiroga Lombard, C. S. |
title |
A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
title_short |
A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
title_full |
A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
title_fullStr |
A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
title_full_unstemmed |
A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
title_sort |
simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records |
publishDate |
2018 |
url |
https://doi.org/10.5194/npg-17-585-2010 https://npg.copernicus.org/articles/17/585/2010/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Ice Sheet Project Ice Sheet North Atlantic |
genre_facet |
Greenland Greenland Ice Sheet Project Ice Sheet North Atlantic |
op_source |
eISSN: 1607-7946 |
op_relation |
doi:10.5194/npg-17-585-2010 https://npg.copernicus.org/articles/17/585/2010/ |
op_doi |
https://doi.org/10.5194/npg-17-585-2010 |
container_title |
Nonlinear Processes in Geophysics |
container_volume |
17 |
container_issue |
5 |
container_start_page |
585 |
op_container_end_page |
592 |
_version_ |
1766019123447332864 |