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  • Romano, Maria Carmen (2) (remove)

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  • 2001 (2) (remove)

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Conceptual model of runoff from a forested catchment (2001)
Romano, Maria Carmen ; Thiel, Marco ; Schwarz, Udo ; Kurths, Jürgen ; Lange, Holger ; Hauhs, M.
We investigate the relationship between precipitation and runoff data from a small forested catchment in the Harz mountains (Germany). For this purpose, we develop a conceptual model including memory effects to predict the runoff signal using the precipitation data as input. An enhanced variant of the model also includes air temperature as input variable. We show in terms of correlation functions that this model describes main dynamical properties of the runoff, especially the delay between rain event and runoff response as the annual persistence in the runoff data.
Nonlinear Time series analysis of the X-ray flux of compact objects (2001)
Thiel, Marco ; Romano, Maria Carmen ; Schwarz, Udo ; Kurths, Jürgen ; Hasinger, Günther ; Belloni, Tomaso
We analyse the X-ray light curves of compact objects using linear and nonlinear time series analysis methods. A Power Density Spectrum (PDS) describes the overall second order properties of the observed data well. To look beyond we propose the nonlinear Q-statistic to detect an asymmetry of the time series. This allows us to find relevant time scales. This method even grants a subclassification of the known states of X-ray sources.
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