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A Semi-phenomenological Approach to Explain the Event-size Distribution of the Drossel-schwabl Forest-fire Model : Volume 18, Issue 3 (21/06/2011)

By Hergarten, S.

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Book Id: WPLBN0003982106
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: A Semi-phenomenological Approach to Explain the Event-size Distribution of the Drossel-schwabl Forest-fire Model : Volume 18, Issue 3 (21/06/2011)  
Author: Hergarten, S.
Volume: Vol. 18, Issue 3
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Krenn, R., & Hergarten, S. (2011). A Semi-phenomenological Approach to Explain the Event-size Distribution of the Drossel-schwabl Forest-fire Model : Volume 18, Issue 3 (21/06/2011). Retrieved from

Description: Institut für Erdwissenschaften, Karl-Franzens-Universität Graz, Heinrichstraße 26, 8010 Graz, Austria. We present a novel approach to explain the complex scaling behavior of the Drossel-Schwabl forest-fire model in two dimensions. Clusters of trees are characterized by their size and perimeter only, whereas spatial correlations are neglected. Coalescence of clusters is restricted to clusters of similar sizes. Our approach derives the value of the scaling exponent τ of the event size distribution directly from the scaling of the accessible perimeter of percolation clusters. We obtain Τ = 1.19 in the limit of infinite growth rate, in perfect agreement with numerical results. Furthermore, our approach predicts the unusual transition from a power law to an exponential decay even quantitatively, while the exponential decay at large event sizes itself is reproduced only qualitatively.

A semi-phenomenological approach to explain the event-size distribution of the Drossel-Schwabl forest-fire model

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