Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change
IV Congress of Marine Sciences, 11-13 June 2014, Las Palmas de Gran Canaria.-- 1 page
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dig-icm-es-10261-1166982020-12-09T13:16:19Z Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change Herrero, Carmen García-Olivares, Antonio de la Fuente, P. Pelegrí, Josep Lluís IV Congress of Marine Sciences, 11-13 June 2014, Las Palmas de Gran Canaria.-- 1 page There are many known complex systems with a relaxation oscillation behavior, characterized by a periodic phenomenon where relatively stable periods are interrupted abruptly by a sharp transition when a critical point is reached, shifting to a contrasting state. Some examples of these complex systems are Van der Pol Oscillator, Lotka-Volterra equations, both showing this stable to unstable shifting, or even glacial - interglacial changes in the Earth System, which may also obey to the dynamics of a relaxation oscillator rather than to a critical bifurcation. For this work, an exhaustive analysis of Van der Pol and Lotka-Volterra oscillators has been carried out to nd a statistic methodology that allow us to predict the critical point at which the shifting between stable and unstable states will be produced, with the aim of apply that methodology to the glacial-interglacial oscillations of the climate system. First of all, oscillator's atractor has been analyzed to study the stability of the system in front of noise, giving us an idea of how stable is the system to small perturbations. Then, several statistic descriptors have been analyzed such as autocorrelation at lag 1, variance or autoregression, used to show if there is any characteristic slowing down of the uctuations previous to unstable shift. The resulting methodology has been applied to a model of glacial-interglacial oscillations (García-Olivares and Herrero 2013, Clim. Dyn) to analyze the relaxation oscillations of CO2 and global ice volume time series Peer Reviewed 2015-06-17T08:01:54Z 2015-06-17T08:01:54Z 2014-06-13 2015-06-17T08:01:54Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 isbn: 978-84-697-0471-4 Book of Abstracts submitted to the IV Congress of Marine Sciences. Las Palmas de Gran Canaria, June 11th to 13th: 163 (2014) http://hdl.handle.net/10261/116698 none |
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IV Congress of Marine Sciences, 11-13 June 2014, Las Palmas de Gran Canaria.-- 1 page |
| format |
comunicación de congreso |
| author |
Herrero, Carmen García-Olivares, Antonio de la Fuente, P. Pelegrí, Josep Lluís |
| spellingShingle |
Herrero, Carmen García-Olivares, Antonio de la Fuente, P. Pelegrí, Josep Lluís Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change |
| author_facet |
Herrero, Carmen García-Olivares, Antonio de la Fuente, P. Pelegrí, Josep Lluís |
| author_sort |
Herrero, Carmen |
| title |
Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change |
| title_short |
Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change |
| title_full |
Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change |
| title_fullStr |
Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change |
| title_full_unstemmed |
Statistical study of relaxation oscillations. A quest to find a real early warning signal in climate change |
| title_sort |
statistical study of relaxation oscillations. a quest to find a real early warning signal in climate change |
| publishDate |
2014-06-13 |
| url |
http://hdl.handle.net/10261/116698 |
| work_keys_str_mv |
AT herrerocarmen statisticalstudyofrelaxationoscillationsaquesttofindarealearlywarningsignalinclimatechange AT garciaolivaresantonio statisticalstudyofrelaxationoscillationsaquesttofindarealearlywarningsignalinclimatechange AT delafuentep statisticalstudyofrelaxationoscillationsaquesttofindarealearlywarningsignalinclimatechange AT pelegrijoseplluis statisticalstudyofrelaxationoscillationsaquesttofindarealearlywarningsignalinclimatechange |
| _version_ |
1777666280551088128 |