Impacts of sea-level rise for shoreline changes
To which extent does present day sea-level rise affect shoreline changes? This question remains largely open due to the lack of knowledge and data regarding coastal hydrosedimentary processes and relative sea-level changes (i.e., including vertical ground motions). This PhD Thesis first addresses th...
Main Author: | |
---|---|
Other Authors: | , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
Published: |
HAL CCSD
2016
|
Subjects: | |
Online Access: | https://theses.hal.science/tel-01661291 https://theses.hal.science/tel-01661291/document https://theses.hal.science/tel-01661291/file/LECOZANNET.pdf |
id |
ftunivnantes:oai:HAL:tel-01661291v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:tel-01661291v1 2023-05-15T16:13:10+02:00 Impacts of sea-level rise for shoreline changes Les conséquences de l'élévation du niveau marin pour le recul du trait de côte Le Cozannet, Gonéri Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de géographie physique (Paris) Université Panthéon-Sorbonne - Paris I Franck Lavigne 2016-12-02 https://theses.hal.science/tel-01661291 https://theses.hal.science/tel-01661291/document https://theses.hal.science/tel-01661291/file/LECOZANNET.pdf fr fre HAL CCSD NNT: 2016PA01H036 tel-01661291 https://theses.hal.science/tel-01661291 https://theses.hal.science/tel-01661291/document https://theses.hal.science/tel-01661291/file/LECOZANNET.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01661291 Géographie. Université Panthéon-Sorbonne - Paris I, 2016. Français. ⟨NNT : 2016PA01H036⟩ Modelling Sea-level rise Observations Shoreline changes Détection Évolution du trait de côte Niveau de la mer Modélisation [SHS.GEO]Humanities and Social Sciences/Geography info:eu-repo/semantics/doctoralThesis Theses 2016 ftunivnantes 2023-03-08T06:32:02Z To which extent does present day sea-level rise affect shoreline changes? This question remains largely open due to the lack of knowledge and data regarding coastal hydrosedimentary processes and relative sea-level changes (i.e., including vertical ground motions). This PhD Thesis first addresses the question of measuring relative sea-level changes using a combination of geodetic data, including satellite-radar interferometry and permanent GPS stations. Then, it examines the case of coasts that experienced sea-level changes significantly different from the global average over the last 50 years. In the case of atoll islands of French Polynesia, the available data illustrate the major role of southern, trade and cyclonic waves in controlling shoreline changes. For some sheltered coasts, waves are suspected to combine with sea-level rise to favour shoreline retreat. In the case of the European coastal database Eurosion, about 17 000 coastal observations are available and have been analysed using a Bayesian network. Here, part of the spatial variability of shoreline changes can be explained by the fact that Fennoscandian coasts are not only accreting, but also uplifting due to the post-glacial rebound. Overall, these results suggest that it is still too early to observe obvious effects of climate-induced sea-level rise. A probabilistic analysis of the coastal sedimentary equation shows that under common assumptions on hydrosedimentary processes, sea-level rise impacts for beaches should become observable during the second half of the 21st century, if the efforts to maintain climate warming below the 2 C threshold fail. Finally, this PhD thesis offers opportunities for stimulating future research in the field of mathematics applied to the question of climate change and sea-level rise impacts to coastal zones. Dans quelle mesure les variations du niveau marin actuelles agissent-elles sur la mobilité du trait de côte? Cette question est difficile en raison du caractère lacunaire des jeux de données côtières ... Doctoral or Postdoctoral Thesis Fennoscandian Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Modelling Sea-level rise Observations Shoreline changes Détection Évolution du trait de côte Niveau de la mer Modélisation [SHS.GEO]Humanities and Social Sciences/Geography |
spellingShingle |
Modelling Sea-level rise Observations Shoreline changes Détection Évolution du trait de côte Niveau de la mer Modélisation [SHS.GEO]Humanities and Social Sciences/Geography Le Cozannet, Gonéri Impacts of sea-level rise for shoreline changes |
topic_facet |
Modelling Sea-level rise Observations Shoreline changes Détection Évolution du trait de côte Niveau de la mer Modélisation [SHS.GEO]Humanities and Social Sciences/Geography |
description |
To which extent does present day sea-level rise affect shoreline changes? This question remains largely open due to the lack of knowledge and data regarding coastal hydrosedimentary processes and relative sea-level changes (i.e., including vertical ground motions). This PhD Thesis first addresses the question of measuring relative sea-level changes using a combination of geodetic data, including satellite-radar interferometry and permanent GPS stations. Then, it examines the case of coasts that experienced sea-level changes significantly different from the global average over the last 50 years. In the case of atoll islands of French Polynesia, the available data illustrate the major role of southern, trade and cyclonic waves in controlling shoreline changes. For some sheltered coasts, waves are suspected to combine with sea-level rise to favour shoreline retreat. In the case of the European coastal database Eurosion, about 17 000 coastal observations are available and have been analysed using a Bayesian network. Here, part of the spatial variability of shoreline changes can be explained by the fact that Fennoscandian coasts are not only accreting, but also uplifting due to the post-glacial rebound. Overall, these results suggest that it is still too early to observe obvious effects of climate-induced sea-level rise. A probabilistic analysis of the coastal sedimentary equation shows that under common assumptions on hydrosedimentary processes, sea-level rise impacts for beaches should become observable during the second half of the 21st century, if the efforts to maintain climate warming below the 2 C threshold fail. Finally, this PhD thesis offers opportunities for stimulating future research in the field of mathematics applied to the question of climate change and sea-level rise impacts to coastal zones. Dans quelle mesure les variations du niveau marin actuelles agissent-elles sur la mobilité du trait de côte? Cette question est difficile en raison du caractère lacunaire des jeux de données côtières ... |
author2 |
Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de géographie physique (Paris) Université Panthéon-Sorbonne - Paris I Franck Lavigne |
format |
Doctoral or Postdoctoral Thesis |
author |
Le Cozannet, Gonéri |
author_facet |
Le Cozannet, Gonéri |
author_sort |
Le Cozannet, Gonéri |
title |
Impacts of sea-level rise for shoreline changes |
title_short |
Impacts of sea-level rise for shoreline changes |
title_full |
Impacts of sea-level rise for shoreline changes |
title_fullStr |
Impacts of sea-level rise for shoreline changes |
title_full_unstemmed |
Impacts of sea-level rise for shoreline changes |
title_sort |
impacts of sea-level rise for shoreline changes |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://theses.hal.science/tel-01661291 https://theses.hal.science/tel-01661291/document https://theses.hal.science/tel-01661291/file/LECOZANNET.pdf |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
https://theses.hal.science/tel-01661291 Géographie. Université Panthéon-Sorbonne - Paris I, 2016. Français. ⟨NNT : 2016PA01H036⟩ |
op_relation |
NNT: 2016PA01H036 tel-01661291 https://theses.hal.science/tel-01661291 https://theses.hal.science/tel-01661291/document https://theses.hal.science/tel-01661291/file/LECOZANNET.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1765998781643358208 |