Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean
This PhD work focuses on the parameterization of the vertical distribution of phytoplankton biomass and community structure in the global open ocean. First we have developed a neural network-based method for the calibration of the fluorescence in chlorophyll a concentration [Chl] associated with the...
Main Author: | |
---|---|
Other Authors: | , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://tel.archives-ouvertes.fr/tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441/document https://tel.archives-ouvertes.fr/tel-01342441/file/2015PA066625.pdf |
id |
ftccsdartic:oai:HAL:tel-01342441v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:tel-01342441v1 2023-05-15T17:32:38+02:00 Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean Etude et paramétrisation de la distribution verticale de la biomasse phytoplanctonique dans l'ocean global Sauzède, Raphaëlle Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris VI Hervé Claustre Julia Uitz 2015-12-11 https://tel.archives-ouvertes.fr/tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441/document https://tel.archives-ouvertes.fr/tel-01342441/file/2015PA066625.pdf fr fre HAL CCSD NNT: 2015PA066625 tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441/document https://tel.archives-ouvertes.fr/tel-01342441/file/2015PA066625.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-01342441 Océan, Atmosphère. Université Pierre et Marie Curie - Paris VI, 2015. Français. ⟨NNT : 2015PA066625⟩ Phytoplankton Ocean color Chlorophyll Phytoplancton Flotteurs profileurs Bio Couleur de l'eau Coefficient de rétrodiffusion particulaire Fluorescence Bio-Optique Chlorophylle-A [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/doctoralThesis Theses 2015 ftccsdartic 2021-11-21T02:46:37Z This PhD work focuses on the parameterization of the vertical distribution of phytoplankton biomass and community structure in the global open ocean. First we have developed a neural network-based method for the calibration of the fluorescence in chlorophyll a concentration [Chl] associated with the total phytoplankton biomass and with three phytoplankton size classes. This method, (FLAVOR for Fluorescence to Algal communities Vertical distribution in the Oceanic Realm), was trained and validated using a database of ~900 concomitant fluorescence and HPLC-determined pigment profiles. A global database comprising ~49 000 fluorescence profiles was assembled and calibrated with FLAVOR. The resulting database represents a first step towards a global three-dimensional view of phytoplankton biomass and community composition. Second, two neural networks (SOCA for Satellite Ocean Color and Argo data to infer vertical distribution of bio-optical properties) were developed to infer the vertical distribution of two bio-optical proxies of the phytoplankton biomass, [Chl] and the particulate backscattering coefficient, using as input satellite-derived products matched up with a hydrological Argo profile. The SOCA methods were trained and validated using a global database of ~5 000 profiles of bio-optical and hydrological properties collected from Bio-Argo floats with concomitant satellite products. The database used to develop FLAVOR and SOCA originates from various oceanic regions largely representative of the global ocean, making the methods applicable to most oceanic waters. Finally, we proposed a study dedicated to the North Atlantic where the tools developed in this thesis are used in conjunction with a bio-optical primary production model. This allows us to characterize the seasonal cycle of the vertical distribution of the phytoplankton biomass and primary production in various bio-regions of the North Atlantic. Les travaux présentés dans cette thèse concernent la paramétrisation de la distribution verticale de la ... Doctoral or Postdoctoral Thesis North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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 |
Phytoplankton Ocean color Chlorophyll Phytoplancton Flotteurs profileurs Bio Couleur de l'eau Coefficient de rétrodiffusion particulaire Fluorescence Bio-Optique Chlorophylle-A [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Phytoplankton Ocean color Chlorophyll Phytoplancton Flotteurs profileurs Bio Couleur de l'eau Coefficient de rétrodiffusion particulaire Fluorescence Bio-Optique Chlorophylle-A [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Sauzède, Raphaëlle Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
topic_facet |
Phytoplankton Ocean color Chlorophyll Phytoplancton Flotteurs profileurs Bio Couleur de l'eau Coefficient de rétrodiffusion particulaire Fluorescence Bio-Optique Chlorophylle-A [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
This PhD work focuses on the parameterization of the vertical distribution of phytoplankton biomass and community structure in the global open ocean. First we have developed a neural network-based method for the calibration of the fluorescence in chlorophyll a concentration [Chl] associated with the total phytoplankton biomass and with three phytoplankton size classes. This method, (FLAVOR for Fluorescence to Algal communities Vertical distribution in the Oceanic Realm), was trained and validated using a database of ~900 concomitant fluorescence and HPLC-determined pigment profiles. A global database comprising ~49 000 fluorescence profiles was assembled and calibrated with FLAVOR. The resulting database represents a first step towards a global three-dimensional view of phytoplankton biomass and community composition. Second, two neural networks (SOCA for Satellite Ocean Color and Argo data to infer vertical distribution of bio-optical properties) were developed to infer the vertical distribution of two bio-optical proxies of the phytoplankton biomass, [Chl] and the particulate backscattering coefficient, using as input satellite-derived products matched up with a hydrological Argo profile. The SOCA methods were trained and validated using a global database of ~5 000 profiles of bio-optical and hydrological properties collected from Bio-Argo floats with concomitant satellite products. The database used to develop FLAVOR and SOCA originates from various oceanic regions largely representative of the global ocean, making the methods applicable to most oceanic waters. Finally, we proposed a study dedicated to the North Atlantic where the tools developed in this thesis are used in conjunction with a bio-optical primary production model. This allows us to characterize the seasonal cycle of the vertical distribution of the phytoplankton biomass and primary production in various bio-regions of the North Atlantic. Les travaux présentés dans cette thèse concernent la paramétrisation de la distribution verticale de la ... |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris VI Hervé Claustre Julia Uitz |
format |
Doctoral or Postdoctoral Thesis |
author |
Sauzède, Raphaëlle |
author_facet |
Sauzède, Raphaëlle |
author_sort |
Sauzède, Raphaëlle |
title |
Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
title_short |
Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
title_full |
Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
title_fullStr |
Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
title_full_unstemmed |
Study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
title_sort |
study and parameterization of the vertical distribution of phytoplankton biomass in the global ocean |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://tel.archives-ouvertes.fr/tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441/document https://tel.archives-ouvertes.fr/tel-01342441/file/2015PA066625.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
https://tel.archives-ouvertes.fr/tel-01342441 Océan, Atmosphère. Université Pierre et Marie Curie - Paris VI, 2015. Français. ⟨NNT : 2015PA066625⟩ |
op_relation |
NNT: 2015PA066625 tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441 https://tel.archives-ouvertes.fr/tel-01342441/document https://tel.archives-ouvertes.fr/tel-01342441/file/2015PA066625.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766130835242614784 |