Computational and numerical challenges in environmental modelling
著者
書誌事項
Computational and numerical challenges in environmental modelling
（Studies in computational mathematics, 13）
Elsevier, c2006
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注記
Includes bibliographical references and index
内容説明・目次
内容説明
Many large mathematical models, not only models arising and used in environmental studies, are described by systems of partial differential equations. The discretization of the spatial derivatives in such models leads to the solution of very large systems of ordinary differential equations. These systems contain many millions of equations and have to be handled over large time intervals by applying many time-steps (up to several hundred thousand time-steps). Furthermore, many scenarios are as a rule to be run. This explains the fact that the computational tasks in this situation are enormous. Therefore, it is necessary to select fast numerical methods; to develop parallel codes and, what is most important when the problems solved are very large to organize the computational process in a proper way.The last item (which is very often underestimated but, let us re-iterate, which is very important) is the major topic of this book. In fact, the proper organization of the computational process can be viewed as a preparation of templates which can be used with different numerical methods and different parallel devices. The development of such templates is described in the book. It is also demonstrated that many comprehensive environmental studies can successfully be carried out when the computations are correctly organized. Thus, this book will help the reader to understand better that, while (a) it is very important to select fast numerical methods as well as (b) it is very important to develop parallel codes, this will not be sufficient when the problems solved are really very large. In the latter case, it is also crucial to exploit better the computer architecture by organizing properly the computational process.
目次
Chapter 1: PDE systems arising in air pollution modelling and justification of the need for high speed computers
Chapter 2: Using splitting techniques in the treatment of air pollution models
Chapter 3: Treatment of the advection-diffusion phenomena
Chapter 4: Treatment of the chemical part: general ideas major numerical methods
Chapter 5: Error analysis of the partitioning procedures
Chapter 6: Efficient organization of the matrix computations
Chapter 7: Parallel computations
Chapter 8: Studying high pollution levels
Chapter 9: Impact of future climate changes on high pollution levels
Chapter 10: Implementation of variational data assimilation
Chapter 11: Discussion of some open questions
Appendix A: Colour plots
Bibliography
Symbol Table
Author Index
Subject Index
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