Tobias Erhardt - Standardized Drought Indices: A novel uni- and multivariate approach

Tobias Erhardt (Technische Universität, München) will give a seminar in the lunch area, 8th floor N.H. Abel's House at 14:15 November 24th.

Title: Standardized Drought Indices: A novel uni- and multivariate approach

Abstract:
During past decades many different methods for drought quantification (drought indices) have been developed. However, most of them have crucial shortcomings and account only for one or two variables which influence drought conditions and ignore their dependencies. We provide novel methodology for (multivariate) drought index calculation. inspired by existing approaches we compile a set of criteria which the novel, general, statistical drought indices should fulfill. Our novel approach is a stepwise implementation if these criteria, which omits the disadvantages of existing drought indices and provides a generalization to multivariate input. The multivariate indices are based on vine copulas, which are utilized to flexibly model multivariate non-Gaussian inter-variable dependence structures. For the purpose of illustration a three-variate example is used. This is joint work together with Claudia Czado.

Published Oct. 2, 2015 3:16 PM - Last modified July 4, 2016 8:20 AM