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A Simple Conceptual Model of Abrupt Glacial Climate Events : Volume 14, Issue 6 (23/11/2007)

By Braun, H.

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Book Id: WPLBN0003985772
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: A Simple Conceptual Model of Abrupt Glacial Climate Events : Volume 14, Issue 6 (23/11/2007)  
Author: Braun, H.
Volume: Vol. 14, Issue 6
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Chialvo, D. R., Christl, M., Ganopolski, A., & Braun, H. (2007). A Simple Conceptual Model of Abrupt Glacial Climate Events : Volume 14, Issue 6 (23/11/2007). Retrieved from http://hawaiilibrary.net/


Description
Description: Heidelberg Academy of Sciences and Humanities, c/o Institute of Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany. Here we use a very simple conceptual model in an attempt to reduce essential parts of the complex nonlinearity of abrupt glacial climate changes (the so-called Dansgaard-Oeschger events) to a few simple principles, namely (i) the existence of two different climate states, (ii) a threshold process and (iii) an overshooting in the stability of the system at the start and the end of the events, which is followed by a millennial-scale relaxation. By comparison with a so-called Earth system model of intermediate complexity (CLIMBER-2), in which the events represent oscillations between two climate states corresponding to two fundamentally different modes of deep-water formation in the North Atlantic, we demonstrate that the conceptual model captures fundamental aspects of the nonlinearity of the events in that model. We use the conceptual model in order to reproduce and reanalyse nonlinear resonance mechanisms that were already suggested in order to explain the characteristic time scale of Dansgaard-Oeschger events. In doing so we identify a new form of stochastic resonance (i.e. an overshooting stochastic resonance) and provide the first explicitly reported manifestation of ghost resonance in a geosystem, i.e. of a mechanism which could be relevant for other systems with thresholds and with multiple states of operation. Our work enables us to explicitly simulate realistic probability measures of Dansgaard-Oeschger events (e.g. waiting time distributions, which are a prerequisite for statistical analyses on the regularity of the events by means of Monte-Carlo simulations). We thus think that our study is an important advance in order to develop more adequate methods to test the statistical significance and the origin of the proposed glacial 1470-year climate cycle.

Summary
A simple conceptual model of abrupt glacial climate events

Excerpt
Alley, R B. and Clark, P U.: The deglaciation of the northern hemisphere: A global perspective, Ann. Rev. Earth Planet. Sci., 27, 149–182, 1999.; Alley, R B., Clark, P U., Keigwin, L D., and Webb, R S.: Making sense of millennial-scale climate change, in: Mechanisms of Global Climate Change at Millennial Time Scales, edited by: Clark, P U., Webb, R S., and Keigwin, L D., AGU, Washington, DC, 385–394, 1999.; Alley, R B., Anandakrishnan, S., and Jung, P.: Stochastic resonance in the North Atlantic, Paleoceanography, 16, 190–198, 2001a.; Alley, R B., Anandakrishnan, S., Jung, P., and Clough, A.: Stochastic resonance in the North Atlantic: Further insights, in: The Oceans and Rapid Climate Change: Past, Present and Future, edited by Seidov, D., Maslin, M., Haupt, B J., AGU, Washington, DC, 57–68, 2001b.; Alley, R B., Marotzke, J., Nordhaus, W D., Overpeck, J T., Peteet, D M., Pielke Jr., R A., Pierrehumbert, R T., Rhines, P B., Stocker, T F., Talley, L D., and Wallace, J M.: Abrupt Climate Change, Science, 299, 2005–2010, 2003.; Benzi, R., Parisi, G., Sutera, A., and Vulpiani, A.: Stochastic resonance in climatic change, Tellus, 34, 10–16, 1982.; Bond, G., Kromer, B., Beer, J., Muscheler, R., Evans, M N., Showers, W., Hoffmann, S., Lotti-Bond, R., Hajdas, I., and Bonani, G.: Persistent Solar Influence on North Atlantic Climate During the Holocene, Science, 294, 2130–2136, 2001.; Braun, H., Christl, M., Rahmstorf, S., Ganopolski, A., Mangini, A., Kubatzki, C., Roth, K., and Kromer, B.: Possible solar origin of the 1,470-year glacial climate cycle demonstrated in a coupled model, Nature, 438, 208–211, 2005.; Broecker, W S., Peteet, D M., and Rind, D.: Does the ocean-atmosphere system have more than one stable mode of operation?, Nature, 315, 21–26, 1985.; Broecker, W S., Bond, G., Klas, M., Bonani, G., and Wolfli, W.: A salt oscillator in the glacial Atlantic? 1. The concept, Paleoceanography, 5, 469–477, 1990.; Buldu, J M., Chialvo, D R., Mirasso, C R., Torrent, M C., and Garcia-Ojalvo, J.: Ghost resonance in a semiconductor laser with optical feedback, Europhys. Lett., 64, 178–184, 2003.; Centurelli, R., Musacchioa, S., Pasmanterc, R A., and Vulpiani, A.: Resemblances and differences in mechanisms of noise-induced resonance, Physica A, 360, 261–273, 2006.; Chialvo, D R., Calvo, O., Gonzalez, D L., Piro, O., and Savino, G V.: Subharmonic stochastic synchronization and resonance in neuronal systems, Phys. Rev. E, 65, 050902, doi:10.1103/PhysRevE.65.050902, 2002.; Chialvo, D R.: How we hear what is not there: A neuronal mechanism for the missing fundamental illusion, Chaos, 13, 1226–1230, 2003.; Claussen, M., Mysak, L A., Weaver, A J., Crucifix, M., Fichefet, T., Loutre, M.-F., Weber, S L., Alcamo, J., Alexeev, V A., Berger, A., Calov, R., Ganopolski, A., Goose, H., Lohmann, G., Lunkeit, F., Mokhov, I I., Petoukhov, V., Stone, P., and Wang, Z.: Earth system models of intermediate complexity: closing the gap in the spectrum of climate system models, Clim. Dynam., 18, 579–586, 2002.; Clemens, S C.: Millennial-band climate spectrum resolved and linked to centennial-scale solar cycles, Quat. Sci. Rev., 24, 521–531, 2005.; Dansgaard, W., Clausen, H B., Gundestrup, N., Hammer, C U., Johnsen, S F., Kristinsdottir, P M., and Reeh, N.: A New Greenland Deep Ice Core, Science, 218, 1273–1277, 1982.; Ditlevsen, P D., Kristensen, M S., Andersen, K K.: The recurrence time of Dansgaard-Oeschger events and possible causes, J. Climate, 18, 2594–2603, 2005.; Ditlevsen, P D., Andersen, K K., Svensson, A.: The DO-climate events are probably noise induced: statistical investigation of the claimed 1470 years cycle, Clim. Past, 3, 129–134, 2007.; Gammaitoni, L., Hänggi, P., Jung, P., and Marchesoni, F.: Stochastic resonance, Rev. Mod. Phys., 70, 223–288, 1998.; Ganopol

 

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