Estimating basal properties of glaciers and ice streams from surface measurements:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Zürich
Versuchsanst. für Wasserbau, Hydrologie und Glaziologie
2007
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| Schriftenreihe: | Mitteilungen / Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie der Eidgenössischen Technischen Hochschule Zürich
202 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XVII, 152 S. Ill., graph. Darst., Kt. |
Internformat
MARC
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| 245 | 1 | 0 | |a Estimating basal properties of glaciers and ice streams from surface measurements |c Mélanie Raymond |
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Datensatz im Suchindex
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| adam_text | VERSUCHSANSTALT FUR WASSERBAU HYDROLOGIE UND GJAZIOLOGIE DER
EIDGENOSSISCHEN TECHNISCHEN HOCHSCHULE ZURICH MITTEILUNGEN 202
ESTIMATING BASAL PROPERTIES OF GLACIERS AND ICE STREAMS FROM SURFACE
MEASUREMENTS MELANIE RAYMOND KPJA -I WOY. 2007 ZURICH, 2007 HERAUSGEBER:
PROF. DR.-LNG. H.-E. MINOR FACHBEREICH 13 I DARMSTADT) 62505885
CONTENTS LIST OF FIGURES VII LIST OF SYMBOLS XI ABSTRACT XV RESUME XVII
1 INTRODUCTION 1 1.1 GENERAL FRAMEWORK 1 1.2 AIM OF THIS THESIS 4 1.3
THESIS OUTLINE 4 1 FORWARD PROBLEM 5 2 BED-TO-SURFACE TRANSFER
CHARACTERISTICS 7 2.1 INTRODUCTION 8 2.2 FINITE-ELEMENT ICE-FLOW MODEL 9
2.2.1 BOUNDARY CONDITIONS 10 2.2.2 NON-DIMENSIONALIZATION 11 2.3
ALGORITHM 11 2.4 RESULTS 12 2.4.1 FINITE-AMPLITUDE EFFECTS 13 2.4.2
SURFACE TOPOGRAPHY 22 2.4.3 SURFACE VELOCITIES 29 2.4.4 DISCUSSION AND
SUMMARY 34 III 3 VELOCITY FIELDS 41 3.1 INTRODUCTION 41 3.2 NUMERICAL
MODEL 43 3.2.1 BOUNDARY CONDITIONS 43 3.2.2 NON-DIMENSIONALIZATION 44
3.2.3 MODEL CHARACTERISTICS 45 3.3 MODEL RESULTS 45 3.3.1 DETERMINATION
OF THE VELOCITY FIELD PERTURBATIONS 45 3.3.2 VALIDATION 46 3.3.3
NONLINEAR FINITE AMPLITUDE EFFECTS 46 3.3.4 VELOCITY FIELDS 50 3.4
DISCUSSION AND SUMMARY 59 II INVERSE PROBLEM 65 4 BAYESIAN INFERENCE 67
4.1 BAYESIAN INFERENCE: AN INTRODUCTION 67 4.2 APPLICATION EXAMPLE 69 5
NON-LINEAR INVERSION OF SYNTHETIC DATA 71 5.1 INTRODUCTION 71 5.2
BED-TO-SURFACE TRANSFER AND FORWARD MODEL 73 5.3 NON-LINEAR BAYESIAN
INVERSION 75 5.3.1 FORMULATION OF THE PROBLEM 75 5.4 NUMERICAL
SIMULATIONS 81 5.4.1 LINEAR RHEOLOGY 81 5.4.2 NON-LINEAR RHEOLOGY 86
5.4.3 MODELING ERRORS 100 5.5 CONCLUSIONS 104 6 NON-LINEAR INVERSION OF
REAL DATA 107 6.1 INTRODUCTION 108 6.2 FORWARD ICE STREAM MODEL 108
6.2.1 BOUNDARY CONDITIONS 109 6.2.2 PARAMETERIZATION OF THE SHEAR
MARGINS 109 6.3 NON-LINEAR BAYESIAN INVERSION 110 6.3.1 FORMULATION OF
THE PROBLEM 110 6.3.2 QUANTIFIYING UNCERTAINTIES 112 6.4 INVERSIONS WITH
SYNTHETIC DATA 113 6.4.1 SIMPLE GEOMETRY 114 6.4.2 RUTFORD BEDROCK
TOPOGRAPHY 114 6.5 RUTFORD ICE STREAM INVERSION 118 6.5.1 DATA 118 6.5.2
PRIOR MODEL PARAMETERS 125 6.5.3 INVERSION WITHOUT SURFACE EVOLUTION 125
6.5.4 INVERSION WITH SURFACE EVOLUTION 131 6.6 DISCUSSION 134 6.6.1
COMPARISON BETWEEN INVERSION RESULTS WITH AND WITHOUT SURFACE EVOLUTION
134 6.7 CONCLUSIONS 136 7 GENERAL CONCLUSIONS 141 7.1 OVERVIEW OF THE
RESULTS 142 7.1.1 FORWARD PROBLEM 142 7.1.2 INVERSE PROBLEM 143 7.2
OUTLOOK . 143 BIBLIOGRAPHY 145 ACKNOWLEDGEMENTS 151
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| spelling | Raymond, Mélanie Verfasser aut Estimating basal properties of glaciers and ice streams from surface measurements Mélanie Raymond Zürich Versuchsanst. für Wasserbau, Hydrologie und Glaziologie 2007 XVII, 152 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Mitteilungen / Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie der Eidgenössischen Technischen Hochschule Zürich 202 Zugl.: Zürich, Eidgen. Techn. Hochsch., Diss., 2007 (DE-588)4113937-9 Hochschulschrift gnd-content Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie der Eidgenössischen Technischen Hochschule Zürich Mitteilungen 202 (DE-604)BV000019874 202 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018336700&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Raymond, Mélanie Estimating basal properties of glaciers and ice streams from surface measurements |
| subject_GND | (DE-588)4113937-9 |
| title | Estimating basal properties of glaciers and ice streams from surface measurements |
| title_auth | Estimating basal properties of glaciers and ice streams from surface measurements |
| title_exact_search | Estimating basal properties of glaciers and ice streams from surface measurements |
| title_full | Estimating basal properties of glaciers and ice streams from surface measurements Mélanie Raymond |
| title_fullStr | Estimating basal properties of glaciers and ice streams from surface measurements Mélanie Raymond |
| title_full_unstemmed | Estimating basal properties of glaciers and ice streams from surface measurements Mélanie Raymond |
| title_short | Estimating basal properties of glaciers and ice streams from surface measurements |
| title_sort | estimating basal properties of glaciers and ice streams from surface measurements |
| topic_facet | Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018336700&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV000019874 |
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