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Abstract:

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 δ18O (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. © 2010 Author(s).

Registro:

Documento: Artículo
Título:A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records
Autor:Quiroga Lombard, C.S.; Balenzuela, P.; Braun, H.; Chialvo, D.R.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabelló3n 1, Ciudad Universitaria, (1428), Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Buenos Aires 1033, Argentina
Heidelberg Academy of Sciences and Humanities, University of Heidelberg, Heidelberg, Germany
Center for Ice and Climate, University of Copenhagen, Copenhagen, Denmark
Palabras clave:air temperature; Holocene; paleoclimate; paleotemperature; proxy climate record; sea surface temperature; spectral analysis; Arctic; Atlantic Ocean; Atlantic Ocean (North); Greenland; Greenland Ice Sheet
Año:2010
Volumen:17
Número:5
Página de inicio:585
Página de fin:592
DOI: http://dx.doi.org/10.5194/npg-17-585-2010
Título revista:Nonlinear Processes in Geophysics
Título revista abreviado:Nonlinear Processes Geophys.
ISSN:10235809
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_10235809_v17_n5_p585_QuirogaLombard.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10235809_v17_n5_p585_QuirogaLombard

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Citas:

---------- APA ----------
Quiroga Lombard, C.S., Balenzuela, P., Braun, H. & Chialvo, D.R. (2010) . A simple conceptual model to interpret the 100 000 years dynamics of paleo-climate records. Nonlinear Processes in Geophysics, 17(5), 585-592.
http://dx.doi.org/10.5194/npg-17-585-2010
---------- CHICAGO ----------
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" . Nonlinear Processes in Geophysics 17, no. 5 (2010) : 585-592.
http://dx.doi.org/10.5194/npg-17-585-2010
---------- MLA ----------
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" . Nonlinear Processes in Geophysics, vol. 17, no. 5, 2010, pp. 585-592.
http://dx.doi.org/10.5194/npg-17-585-2010
---------- VANCOUVER ----------
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. Nonlinear Processes Geophys. 2010;17(5):585-592.
http://dx.doi.org/10.5194/npg-17-585-2010