Meteorological Data Assimilation - Local Analysis and Efficient Numerical Techniques for Constrained Differential Optimization

Eva Eggeling

Verlag: Shaker Verlag Mrz 2004, 2004
ISBN 10: 3832222030 / ISBN 13: 9783832222031
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Neuware - 158 pp. Englisch. Buchnummer des Verkäufers

Bibliografische Details

Titel: Meteorological Data Assimilation - Local ...
Verlag: Shaker Verlag Mrz 2004
Erscheinungsdatum: 2004
Einband: Taschenbuch
Zustand: Neu

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Eva Eggeling
Verlag: Shaker Verlag Mrz 2004 (2004)
ISBN 10: 3832222030 ISBN 13: 9783832222031
Neu Taschenbuch Anzahl: 1
(Einbeck, Deutschland)

Buchbeschreibung Shaker Verlag Mrz 2004, 2004. Taschenbuch. Buchzustand: Neu. 225x162x12 mm. Neuware - The aim of this thesis is to present a new local analysis tool for ana Iyzing the meteorological data assimilation problem. This analysis is based on the representation in form of wave-packets and extends the standard Fourier analysis for differential optimization problems governed by elliptic partial differential equations to non-elliptic problems. In our study the data assimilation which is an inverse problem is formulated as a constrained optimization problem, where the cost functional consists of a distance function and the constraint is given by a model problem. An accurate model for the data assimilation involves the Navier-Stokes equations and in certain casos the Euler equations. In order to understand the diverse and intricate aspects of the problem we have formulated three model problems which aim at tackling some of the basic difficulties faced in the real-life problem. We have studied the effect of dissipation and dispersion in different diseretization sehemes on the identifiability of the data in the problem. Due to a major loss of information in ease of long distances, dissipation will, in principle, result in bad estimates if measurement locations are far away. We are demonstrating results of several model cases, including the advection equation and a system of wave equations. For this purpose, we have used different types of data, in terms of measurement locations and their amount. 158 pp. Englisch. Artikel-Nr. 9783832222031

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