Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements
My thesis relates to the “Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements”, in two major regions considering the water cycle and illustrating the high variability of the sea surface salinity (SSS): regions of high precipitations and the...
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Other Authors: | , , , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2020
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Online Access: | https://theses.hal.science/tel-04024079 https://theses.hal.science/tel-04024079/document https://theses.hal.science/tel-04024079/file/SUPPLY_Alexandre_2020.pdf |
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ftccsdartic:oai:HAL:tel-04024079v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Salinity Stratification Satellite SMOS Freshening Salinité Dessalure Bande-L [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.MCG]Environmental Sciences/Global Changes [SDE.IE]Environmental Sciences/Environmental Engineering |
spellingShingle |
Salinity Stratification Satellite SMOS Freshening Salinité Dessalure Bande-L [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.MCG]Environmental Sciences/Global Changes [SDE.IE]Environmental Sciences/Environmental Engineering Supply, Alexandre Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
topic_facet |
Salinity Stratification Satellite SMOS Freshening Salinité Dessalure Bande-L [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.MCG]Environmental Sciences/Global Changes [SDE.IE]Environmental Sciences/Environmental Engineering |
description |
My thesis relates to the “Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements”, in two major regions considering the water cycle and illustrating the high variability of the sea surface salinity (SSS): regions of high precipitations and the Arctic Ocean. My work first focused on the relationship between freshening and heavy precipitation. This study determined the relationship between the SSS anomaly and the instantaneous rainfall rate (RR). I then showed, via autocorrelation spectra composites, that rainfall history played a negligible role in most wind conditions, compared to instantaneous rainfall rate. These results demonstrated an unexpected behavior compared to in-situ observations and highlighted the determining aspect of the spatial scales considered. They motivated an in-depth study of the salinity heterogeneity effect within a pixel, on satellite measurement and from in-situ measurements. After studying the low salinity signals associated with tropical rains, I focused on the low salinity signals observed at the surface of the Arctic Ocean, much of which comes from river plumes. I was able to derive arctic salinity fields that performed better than reanalysis, in areas of high variability and in areas close to sea ice. These new SSS product open the field to new studies, both at seasonal and inter-annual scales. Ma thèse porte sur l’« Étude des dessalures à la surface d’un océan stratifié à partir d’observations satellitaires et de mesures in-situ », dans deux régions majeures vis-à-vis du cycle de l’eau et illustrant la forte variabilité de la salinité à la surface de l’océan (SSS) : les régions de fortes précipitations et l’océan Arctique. Mes travaux se sont tout d’abord concentrés sur la relation entre dessalures et fortes précipitations. Cette étude a permis de déterminer la relation entre l’anomalie de SSS et le taux de pluie instantané (RR). J’ai montré, via des composites de spectres d’autocorrélation, que l’historique de la pluie ... |
author2 |
Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Sorbonne Université Jacqueline Boutin |
format |
Doctoral or Postdoctoral Thesis |
author |
Supply, Alexandre |
author_facet |
Supply, Alexandre |
author_sort |
Supply, Alexandre |
title |
Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
title_short |
Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
title_full |
Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
title_fullStr |
Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
title_full_unstemmed |
Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
title_sort |
study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://theses.hal.science/tel-04024079 https://theses.hal.science/tel-04024079/document https://theses.hal.science/tel-04024079/file/SUPPLY_Alexandre_2020.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Arctique* Sea ice |
genre_facet |
Arctic Arctic Ocean Arctique* Sea ice |
op_source |
https://theses.hal.science/tel-04024079 Océanographie. Sorbonne Université, 2020. Français. ⟨NNT : 2020SORUS390⟩ |
op_relation |
NNT: 2020SORUS390 tel-04024079 https://theses.hal.science/tel-04024079 https://theses.hal.science/tel-04024079/document https://theses.hal.science/tel-04024079/file/SUPPLY_Alexandre_2020.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1785577258939842560 |
spelling |
ftccsdartic:oai:HAL:tel-04024079v1 2023-12-17T10:25:37+01:00 Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements Étude des dessalures à la surface d'un océan stratifié à partir d'observations satellitaires et de mesures in-situ Supply, Alexandre Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Sorbonne Université Jacqueline Boutin 2020-12-17 https://theses.hal.science/tel-04024079 https://theses.hal.science/tel-04024079/document https://theses.hal.science/tel-04024079/file/SUPPLY_Alexandre_2020.pdf fr fre HAL CCSD NNT: 2020SORUS390 tel-04024079 https://theses.hal.science/tel-04024079 https://theses.hal.science/tel-04024079/document https://theses.hal.science/tel-04024079/file/SUPPLY_Alexandre_2020.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-04024079 Océanographie. Sorbonne Université, 2020. Français. ⟨NNT : 2020SORUS390⟩ Salinity Stratification Satellite SMOS Freshening Salinité Dessalure Bande-L [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.MCG]Environmental Sciences/Global Changes [SDE.IE]Environmental Sciences/Environmental Engineering info:eu-repo/semantics/doctoralThesis Theses 2020 ftccsdartic 2023-11-18T23:50:55Z My thesis relates to the “Study of freshening over the surface of a stratified ocean from satellite observations and in-situ measurements”, in two major regions considering the water cycle and illustrating the high variability of the sea surface salinity (SSS): regions of high precipitations and the Arctic Ocean. My work first focused on the relationship between freshening and heavy precipitation. This study determined the relationship between the SSS anomaly and the instantaneous rainfall rate (RR). I then showed, via autocorrelation spectra composites, that rainfall history played a negligible role in most wind conditions, compared to instantaneous rainfall rate. These results demonstrated an unexpected behavior compared to in-situ observations and highlighted the determining aspect of the spatial scales considered. They motivated an in-depth study of the salinity heterogeneity effect within a pixel, on satellite measurement and from in-situ measurements. After studying the low salinity signals associated with tropical rains, I focused on the low salinity signals observed at the surface of the Arctic Ocean, much of which comes from river plumes. I was able to derive arctic salinity fields that performed better than reanalysis, in areas of high variability and in areas close to sea ice. These new SSS product open the field to new studies, both at seasonal and inter-annual scales. Ma thèse porte sur l’« Étude des dessalures à la surface d’un océan stratifié à partir d’observations satellitaires et de mesures in-situ », dans deux régions majeures vis-à-vis du cycle de l’eau et illustrant la forte variabilité de la salinité à la surface de l’océan (SSS) : les régions de fortes précipitations et l’océan Arctique. Mes travaux se sont tout d’abord concentrés sur la relation entre dessalures et fortes précipitations. Cette étude a permis de déterminer la relation entre l’anomalie de SSS et le taux de pluie instantané (RR). J’ai montré, via des composites de spectres d’autocorrélation, que l’historique de la pluie ... Doctoral or Postdoctoral Thesis Arctic Arctic Ocean Arctique* Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean |