OPTIMISATION D'UN MODELE DE L'OCEAN ATLANTIQUE TROPICAL PAR METHODE INVERSE ADAPTATIVE PDF Download
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Book Description
AFIN DE DETERMINER LES VALEURS DES PARAMETRES AJUSTABLES D'UN MODELE OCEANIQUE QUI CONDUISENT A LA MEILLEURE ADEQUATION POSSIBLE ENTRE MODELE ET OBSERVATIONS, UNE METHODE INVERSE ADAPTATIVE EST DEVELOPPEE ET EST APPLIQUEE A UN MODELE DE PREDICTION DE LA TEMPERATURE DE SURFACE (SST) DE L'OCEAN ATLANTIQUE TROPICAL. L'OPTIMISATION EST REALISEE EN MINIMISANT L'ECART ENTRE DONNEES OBSERVEES ET SIMULEES, QUI DEPEND D'ERREURS D'OBSERVATION ET DE MODELISATION. UNE PROCEDURE ADAPTATIVE EST MISE EN PLACE AU COURS DE LAQUELLE LE MODELE QUE L'ON OPTIMISE EST UTILISE AFIN DE CONSTRUIRE LE MODELE D'ERREURS D'OBSERVATION. L'OPTIMISATION EST APPLIQUEE AU CYCLE SAISONNIER MOYEN EN UTILISANT LES ANOMALIES DE SST POUR DIFFERENTES ANNEES ET DIFFERENTS FORCAGES ATMOSPHERIQUES PLAUSIBLES, COMME INFORMATION ADDITIONNELLE POUR CONSTRUIRE UNE ESTIMATION DE LA MATRICE DE COVARIANCE D'ERREURS D'OBSERVATION. EN UTILISANT UN MODELE IDEALISE POUR REPRESENTER LES ERREURS DE MODELISATION, LA PROCEDURE EST APPLIQUEE AU MODELE DE SST DE BLUMENTHAL ET CANE (1989) ET CONDUIT A DES VALEURS AFFINEES DES PLUSIEURS PARAMETRES DU MODELE ET DES FLUX DE CHALEUR. LA SIMULATION DE LA SST EN MOYENNE ANNUELLE EST AMELIOREE ALORS QUE LA SIMULATION DES FLUCTUATIONS SAISONNIERES ET DES ANOMALIES MENSUELLES NE L'EST PAS. L'ECART RESIDUEL ENTRE MODELE ET OBSERVATIONS DEMEURE TROP IMPORTANT POUR ETRE ATTRIBUE AUX ERREURS SUR LE FORCAGE ATMOSPHERIQUE ET SUR LES DONNEES OCEANIQUES UNIQUEMENT. IL EST LIE A LA GEOMETRIE SIMPLIFIEE DU MODELE AINSI QU'A SA MAUVAISE REPRESENTATION DU PHENOMENE DE REFROIDISSEMENT DES EAUX DE SURFACE PAR REMONTEE D'EAUX FROIDES (UPWELLING). L'EXISTENCE D'ERREURS DE MODELISATION PLUS IMPORTANTES QUE CELLES PRISES EN COMPTE DANS LE MODELE D'ERREUR THEORIQUE EST CONFIRME PAR UN TEST STATISTIQUE DE VALIDATION DES HYPOTHESES DU CALCUL INVERSE
Book Description
AFIN DE DETERMINER LES VALEURS DES PARAMETRES AJUSTABLES D'UN MODELE OCEANIQUE QUI CONDUISENT A LA MEILLEURE ADEQUATION POSSIBLE ENTRE MODELE ET OBSERVATIONS, UNE METHODE INVERSE ADAPTATIVE EST DEVELOPPEE ET EST APPLIQUEE A UN MODELE DE PREDICTION DE LA TEMPERATURE DE SURFACE (SST) DE L'OCEAN ATLANTIQUE TROPICAL. L'OPTIMISATION EST REALISEE EN MINIMISANT L'ECART ENTRE DONNEES OBSERVEES ET SIMULEES, QUI DEPEND D'ERREURS D'OBSERVATION ET DE MODELISATION. UNE PROCEDURE ADAPTATIVE EST MISE EN PLACE AU COURS DE LAQUELLE LE MODELE QUE L'ON OPTIMISE EST UTILISE AFIN DE CONSTRUIRE LE MODELE D'ERREURS D'OBSERVATION. L'OPTIMISATION EST APPLIQUEE AU CYCLE SAISONNIER MOYEN EN UTILISANT LES ANOMALIES DE SST POUR DIFFERENTES ANNEES ET DIFFERENTS FORCAGES ATMOSPHERIQUES PLAUSIBLES, COMME INFORMATION ADDITIONNELLE POUR CONSTRUIRE UNE ESTIMATION DE LA MATRICE DE COVARIANCE D'ERREURS D'OBSERVATION. EN UTILISANT UN MODELE IDEALISE POUR REPRESENTER LES ERREURS DE MODELISATION, LA PROCEDURE EST APPLIQUEE AU MODELE DE SST DE BLUMENTHAL ET CANE (1989) ET CONDUIT A DES VALEURS AFFINEES DES PLUSIEURS PARAMETRES DU MODELE ET DES FLUX DE CHALEUR. LA SIMULATION DE LA SST EN MOYENNE ANNUELLE EST AMELIOREE ALORS QUE LA SIMULATION DES FLUCTUATIONS SAISONNIERES ET DES ANOMALIES MENSUELLES NE L'EST PAS. L'ECART RESIDUEL ENTRE MODELE ET OBSERVATIONS DEMEURE TROP IMPORTANT POUR ETRE ATTRIBUE AUX ERREURS SUR LE FORCAGE ATMOSPHERIQUE ET SUR LES DONNEES OCEANIQUES UNIQUEMENT. IL EST LIE A LA GEOMETRIE SIMPLIFIEE DU MODELE AINSI QU'A SA MAUVAISE REPRESENTATION DU PHENOMENE DE REFROIDISSEMENT DES EAUX DE SURFACE PAR REMONTEE D'EAUX FROIDES (UPWELLING). L'EXISTENCE D'ERREURS DE MODELISATION PLUS IMPORTANTES QUE CELLES PRISES EN COMPTE DANS LE MODELE D'ERREUR THEORIQUE EST CONFIRME PAR UN TEST STATISTIQUE DE VALIDATION DES HYPOTHESES DU CALCUL INVERSE
Author: Robert Adler Publisher: Springer Science & Business Media ISBN: 1461224306 Category : Mathematics Languages : en Pages : 473
Book Description
The study of the ocean is almost as old as the history of mankind itself. When the first seafarers set out in their primitive ships they had to understand, as best they could, tides and currents, eddies and vortices, for lack of understanding often led to loss of live. These primitive oceanographers were, of course, primarily statisticians. They collected what empirical data they could, and passed it down, ini tially by word of mouth, to their descendants. Data collection continued throughout the millenia, and although data bases became larger, more re liable, and better codified, it was not really until surprisingly recently that mankind began to try to understand the physics behind these data, and, shortly afterwards, to attempt to model it. The basic modelling tool of physical oceanography is, today, the partial differential equation. Somehow, we all 'know" that if only we could find the right set of equations, with the right initial and boundary conditions, then we could solve the mysteries of ocean dynamics once and for all.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium Publisher: ISBN: Category : Command and control systems Languages : en Pages : 202
Author: Thomas D. Kocher Publisher: Springer Science & Business Media ISBN: 3540738371 Category : Science Languages : en Pages : 195
Book Description
Mapping of animal genomes has generated huge databases and several new concepts and strategies, which are useful to elucidate origin, evolution and phylogeny. Genetic and physical maps of genomes further provide precise details on chromosomal location, function, expression and regulation of academically and economically important genes. The series Genome Mapping and Genomics in Animals provides comprehensive and up-to-date reviews on genomic research on a large variety of selected animal systems, contributed by leading scientists from around the world. This volume summarizes the first era of genomic studies of aquaculture species, in which the tools and resources necessary to support whole-genome sequencing were developed. These tools will enhance efforts toward selective breeding of aquaculture species. Included in this volume are summaries of work on salmonids, cyprinids, catfish, tilapias, European sea bass, Japanese flounder, shrimps and oysters.
Author: Selman A. Waksman Publisher: Forgotten Books ISBN: 9781396091131 Category : Science Languages : en Pages : 274
Book Description
Excerpt from The Soil and the Microbe: An Introduction to the Study of the Microscopic Population of the Soil and Its Rôle in Soil Processes and Plant Growth The microorganisms, through their various activities, thus enable organic life to continue uninterruptedly on our planet. They keep in constant circulation the elements which are most essential for plant and animal life. They break down the complex organic molecules, built up by plants and animals, into the simple mineralized constituents, making the elements again available for the growth of cultivated and uncultivated plants which in their turn supply further food for animals. Just as man and other animals, as well as higher plants, find their habitat on the surface of the soil or immediately below it, so do the microbes live largely within the upper few inches of the earth's crust, where they carry out their important activities, supplying a continuous stream of nutrients in an available form for the growth of higher plants. This surface pellicle of the earth is thus found to be the seat of numerous processes of incalculable importance in the life of man, animals, and plants, enabling them to carry out their normal existence on our planet. Just as man and animals are determined in their development by the supply of plant food, so is the growth of plants determined by the activities of microorganisms in the soil. The microbes were probably among the first living organisms which appeared on our planet millions of years ago. Although their presence in ancient rocks is largely speculative, it is reasonable to assume, from an appreciation of their specific physiological processes, that they may have lived normally on the earth long before it was a fit habitat for higher plants and animals. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: M.J. Hambrey Publisher: Geological Society of London ISBN: 186239363X Category : Science Languages : en Pages : 497
Book Description
The volume highlights developments in our understanding of the palaeogeographical, palaeobiological, palaeoclimatic and cryospheric evolution of Antarctica. It focuses on the sedimentary record from the Devonian to the Quaternary Period. It features tectonic evolution and stratigraphy, as well as processes taking place adjacent to, beneath and beyond the ice-sheet margin, including the continental shelf. The contributions in this volume include several invited review papers, as well as original research papers arising from the International Symposium on Antarctic Earth Sciences in Edinburgh, in July 2011. These papers demonstrate a remarkable diversity of Earth science interests in the Antarctic. Following international trends, there is particular emphasis on the Cenozoic Era, reflecting the increasing emphasis on the documentation and understanding of the past record of ice-sheet fluctuations. Furthermore, Antarctic Earth history is providing us with important information about potential future trends, as the impact of global warming is increasingly felt on the continent and its ocean.
Author: Collectif Publisher: IRD Éditions ISBN: 2709922207 Category : Nature Languages : en Pages : 736
Book Description
This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.
Author: Lynne Parenti Publisher: Univ of California Press ISBN: 0520944399 Category : Science Languages : en Pages : 313
Book Description
To unravel the complex shared history of the Earth and its life forms, biogeographers analyze patterns of biodiversity, species distribution, and geological history. So far, the field of biogeography has been fragmented into divergent systematic and evolutionary approaches, with no overarching or unifying research theme or method. In this text, Lynne Parenti and Malte Ebach address this discord and outline comparative tools to unify biogeography. Rooted in phylogenetic systematics, this comparative biogeographic approach offers a comprehensive empirical framework for discovering and deciphering the patterns and processes of the distribution of life on Earth. The authors cover biogeography from its fundamental ideas to the most effective ways to implement them. Real-life examples illustrate concepts and problems, including the first comparative biogeographical analysis of the Indo-West Pacific, an introduction to biogeographical concepts rooted in the earth sciences, and the integration of phylogeny, evolution and earth history.
Author: NATHALIE.. SENNECHAEL
Author: NATHALIE.. SENNECHAEL
Author: Robert Adler
Author: 
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium
Author: Thomas D. Kocher
Author: Selman A. Waksman
Author: M.J. Hambrey
Author: Collectif
Author: Lynne Parenti
Author: