[Todos] HOY: Coloquios DF - Cristina Masoller (UPC), 14hs, Aula Seminario, 2do piso, Pab. I

[Augusto Roncaglia]

COLOQUIOS DEL DEPARTAMENTO DE F�SICA FCEYN - UBA


              En el Aula Seminario, 2do piso, Pab. I,

              Jueves 3/12, 14hs:

              CRISTINA MASOLLER

              Universitat Politecnica de Catalunya


           * What have we learned about the Earth climate dynamics by using
complex*
*networks and nonlinear data analysis tools?*

Climate networks are located at the cross roads of three highly active
interdisciplinary fields: climate dynamics, complex networks and
time-series analysis. In this talk I will summarise the results obtained in
our group within the framework of the LINC project: we have focused in
constructing climate networks by using nonlinear data analysis tools, and I
will discuss their interpretation in terms of known climate phenomena.
Specifically, climate networks have been constructed by using ordinal
mutual information, conditional mutual information and a Granger causality
estimator. I will discuss the methods used to infer lag-times and to
estimate links’ significance. Our analysis has uncovered correlations among
different geographical regions, some of them very well limited in space and
in time scale. I will try to integrate “the results� (the inferred
networks) and the “causes� (known atmospheric and oceanic phenomena): I
will show that the uncovered networks are fully consistent with the present
understanding of climate phenomena. Finally, I will discuss relevant open
issues for future work.
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