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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2010-10-01
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| Series: | Nonlinear Processes in Geophysics |
| Online Access: | http://www.nonlin-processes-geophys.net/17/585/2010/npg-17-585-2010.pdf |
| _version_ | 1819033751954391040 |
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| author | C. S. Quiroga Lombard P. Balenzuela H. Braun D. R. Chialvo |
| author_facet | C. S. Quiroga Lombard P. Balenzuela H. Braun D. R. Chialvo |
| author_sort | C. S. Quiroga Lombard |
| collection | DOAJ |
| 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 &delta;<sup>18</sup>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. |
| first_indexed | 2024-12-21T07:22:49Z |
| format | Article |
| id | doaj.art-f84d22bb760c4375aa63d4bf2b743453 |
| institution | Directory Open Access Journal |
| issn | 1023-5809 1607-7946 |
| language | English |
| last_indexed | 2024-12-21T07:22:49Z |
| publishDate | 2010-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Nonlinear Processes in Geophysics |
| spelling | doaj.art-f84d22bb760c4375aa63d4bf2b7434532022-12-21T19:11:45ZengCopernicus PublicationsNonlinear Processes in Geophysics1023-58091607-79462010-10-0117558559210.5194/npg-17-585-2010A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate recordsC. S. Quiroga LombardP. BalenzuelaH. BraunD. R. ChialvoSpectral 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 &delta;<sup>18</sup>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.http://www.nonlin-processes-geophys.net/17/585/2010/npg-17-585-2010.pdf |
| spellingShingle | C. S. Quiroga Lombard P. Balenzuela H. Braun D. R. Chialvo A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records Nonlinear Processes in Geophysics |
| title | 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_short | 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 |
| url | http://www.nonlin-processes-geophys.net/17/585/2010/npg-17-585-2010.pdf |
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