Statistische Analyse der atmosphärischen Turbulenz und allgemeiner stochastischer Prozesse

The essential part of this work is devoted to a proper characterization of atmospheric turbulence. Being an outstanding problem, the markedly intermittent statistics of velocity differences - the velocity increments - will be examined and their relevance in view of estimating extreme events will be discussed. Considering the statistics of increments that are conditioned on a certain averaged wind speed the statistics approach those of stationary, homogeneous and isotropic turbulence. In addition to that a new model will be presented in which the atmospheric increment statistics are explained as a superposition of different subsets of homogeneous and isotropic turbulence. It will be shown that these subsets are distributed according to a Weibull distribution which is commonly considered to be the annual distribution of averaged wind speeds. A second emphasis is placed on the fundamental problem of the influence of measurement noise in experimental time series. It will be shown that by analyzing experimental time series measurement noise can be distinguished well from the intrinsic dynamical noise. It is found that the whole transition range from pure dynamical to pure measurement noise can be characterized.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Universität Oldenburg

Year

2005

Author dc:creator

• Böttcher, Frank

• [Keine Schlagwörter von Autor/in vergeben.]

Repository record source_url

http://oops.uni-oldenburg.de/115

OAI identifier oai:identifier

oai:oops.uni-oldenburg.de:115