Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock
Mangroves in French Guiana are characterized by their spatial dynamism. This specificity is the result of intense coastal sedimentary processes. The goals of this study are to: (1) quantify mangrove spatial dynamics on a regional level and a multi-decadal timescale using archives of remote sensing i...
Main Author: | |
---|---|
Other Authors: | , , , , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal.science/tel-01297562 https://hal.science/tel-01297562/document https://hal.science/tel-01297562/file/Ms_Th%C3%A8se_Walcker_etcouv.pdf |
id |
ftutoulouse3hal:oai:HAL:tel-01297562v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
French |
topic |
Mangrove Carbon North Atlantic Oscillation Ocean waves Mud banks French Guiana carbone Oscillation Nord Atlantique vagues bancs de vase Guyane [SDE]Environmental Sciences |
spellingShingle |
Mangrove Carbon North Atlantic Oscillation Ocean waves Mud banks French Guiana carbone Oscillation Nord Atlantique vagues bancs de vase Guyane [SDE]Environmental Sciences Walcker, Romain Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
topic_facet |
Mangrove Carbon North Atlantic Oscillation Ocean waves Mud banks French Guiana carbone Oscillation Nord Atlantique vagues bancs de vase Guyane [SDE]Environmental Sciences |
description |
Mangroves in French Guiana are characterized by their spatial dynamism. This specificity is the result of intense coastal sedimentary processes. The goals of this study are to: (1) quantify mangrove spatial dynamics on a regional level and a multi-decadal timescale using archives of remote sensing images; (2) test the hypothesis of the role played by the atmosphere using correlations with time series of atmospheric and ocean surface reanalysis datasets; (3) quantify consequence of this spatial dynamism on coastal carbon storage. Results showed that approximatively 15 000 ha of mangroves fluctuate on a multi-decadal timescale in opposition to the North Atlantic Oscillation (NAO) phases, the main mode of atmospheric multi-decadal variability in the North Atlantic. This relation is operated by ocean waves whose energy is modulated by NAO phases. The study suggests that, on the one hand, decrease of mangrove surface areas is due to periods of high wave energy (NAO+) which favour coastal erosion and mangrove retreat, sediment resuspension and transport. On the other hand, the study suggests that periods of low wave energy (NAO-) favour sediment deposition on the coast and is at the origin of mangrove surface area expansion. Results also showed that alternation between phases of retreat and expansion generates the demographic structure of mangrove ages, which determines the mangrove carbon storage capacity. The study finally suggests that through time mangrove can switch from a source to a sink of carbon, and vice and versa, for the ocean and the atmosphere. La mangrove de Guyane est caractérisée par un dynamisme spatial exceptionnel. Ce caractère découle de processus hydro-sédimentaires côtiers très intenses. Les objectifs de la thèse ont été de : (1) quantifier la dynamique spatiale de l’écosystème mangrove à l’échelle régionale et multi-décennale par l’analyse de données d’archives issues de la télédétection (2) tester l’hypothèse selon laquelle le climat océanique serait à l’origine de cette dynamique en ... |
author2 |
Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université de Toulouse (UT) Université Paul Sabatier Toulouse 3 Fromard Francois(francois.fromard@cict.fr) Anthony Edward J. |
format |
Doctoral or Postdoctoral Thesis |
author |
Walcker, Romain |
author_facet |
Walcker, Romain |
author_sort |
Walcker, Romain |
title |
Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
title_short |
Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
title_full |
Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
title_fullStr |
Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
title_full_unstemmed |
Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
title_sort |
mangrove spatial and temporal dynamic in french guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/tel-01297562 https://hal.science/tel-01297562/document https://hal.science/tel-01297562/file/Ms_Th%C3%A8se_Walcker_etcouv.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
https://hal.science/tel-01297562 Sciences de l'environnement. Université Paul Sabatier Toulouse 3, 2015. Français. ⟨NNT : ⟩ |
op_relation |
tel-01297562 https://hal.science/tel-01297562 https://hal.science/tel-01297562/document https://hal.science/tel-01297562/file/Ms_Th%C3%A8se_Walcker_etcouv.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1810462651945320448 |
spelling |
ftutoulouse3hal:oai:HAL:tel-01297562v1 2024-09-15T18:22:42+00:00 Mangrove spatial and temporal dynamic in French Guiana between 1950 and 2014: atmospheric forcing and implication for coastal carbon stock Dynamique spatiale des mangroves de Guyane entre 1950 et 2014: forçage atmosphérique et conséquence pour le stock de carbone côtier Walcker, Romain Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université de Toulouse (UT) Université Paul Sabatier Toulouse 3 Fromard Francois(francois.fromard@cict.fr) Anthony Edward J. 2015-12-14 https://hal.science/tel-01297562 https://hal.science/tel-01297562/document https://hal.science/tel-01297562/file/Ms_Th%C3%A8se_Walcker_etcouv.pdf fr fre HAL CCSD tel-01297562 https://hal.science/tel-01297562 https://hal.science/tel-01297562/document https://hal.science/tel-01297562/file/Ms_Th%C3%A8se_Walcker_etcouv.pdf info:eu-repo/semantics/OpenAccess https://hal.science/tel-01297562 Sciences de l'environnement. Université Paul Sabatier Toulouse 3, 2015. Français. ⟨NNT : ⟩ Mangrove Carbon North Atlantic Oscillation Ocean waves Mud banks French Guiana carbone Oscillation Nord Atlantique vagues bancs de vase Guyane [SDE]Environmental Sciences info:eu-repo/semantics/doctoralThesis Theses 2015 ftutoulouse3hal 2024-06-25T00:23:41Z Mangroves in French Guiana are characterized by their spatial dynamism. This specificity is the result of intense coastal sedimentary processes. The goals of this study are to: (1) quantify mangrove spatial dynamics on a regional level and a multi-decadal timescale using archives of remote sensing images; (2) test the hypothesis of the role played by the atmosphere using correlations with time series of atmospheric and ocean surface reanalysis datasets; (3) quantify consequence of this spatial dynamism on coastal carbon storage. Results showed that approximatively 15 000 ha of mangroves fluctuate on a multi-decadal timescale in opposition to the North Atlantic Oscillation (NAO) phases, the main mode of atmospheric multi-decadal variability in the North Atlantic. This relation is operated by ocean waves whose energy is modulated by NAO phases. The study suggests that, on the one hand, decrease of mangrove surface areas is due to periods of high wave energy (NAO+) which favour coastal erosion and mangrove retreat, sediment resuspension and transport. On the other hand, the study suggests that periods of low wave energy (NAO-) favour sediment deposition on the coast and is at the origin of mangrove surface area expansion. Results also showed that alternation between phases of retreat and expansion generates the demographic structure of mangrove ages, which determines the mangrove carbon storage capacity. The study finally suggests that through time mangrove can switch from a source to a sink of carbon, and vice and versa, for the ocean and the atmosphere. La mangrove de Guyane est caractérisée par un dynamisme spatial exceptionnel. Ce caractère découle de processus hydro-sédimentaires côtiers très intenses. Les objectifs de la thèse ont été de : (1) quantifier la dynamique spatiale de l’écosystème mangrove à l’échelle régionale et multi-décennale par l’analyse de données d’archives issues de la télédétection (2) tester l’hypothèse selon laquelle le climat océanique serait à l’origine de cette dynamique en ... Doctoral or Postdoctoral Thesis North Atlantic North Atlantic oscillation Université Toulouse III - Paul Sabatier: HAL-UPS |