Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years
The temperature increase during the 1850-2012 period is not uniform globally and the Arctic is warming twice as much as the average. However, the short time coverage of instrumental data makes it difficult to distinguish natural climate variability and anthropogenic forcing. The study of climatic va...
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ftnormandieuniv:oai:HAL:tel-02076939v2 2024-04-14T08:06:14+00:00 Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years Variabilités hydro-climatiques multi-décennales à pluri-séculaires en Arctique-subarctique depuis 2000 ans Nicolle, Marie Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Normandie Université Nicolas Massei 2018-06-25 https://theses.hal.science/tel-02076939 https://theses.hal.science/tel-02076939v2/document https://theses.hal.science/tel-02076939v2/file/marienicolle2.pdf fr fre HAL CCSD NNT: 2018NORMR129 tel-02076939 https://theses.hal.science/tel-02076939 https://theses.hal.science/tel-02076939v2/document https://theses.hal.science/tel-02076939v2/file/marienicolle2.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-02076939 Sciences de la Terre. Normandie Université, 2018. Français. ⟨NNT : 2018NORMR129⟩ Arctic Climate variability Paleoclimate Databases Signal analysis Arctique Variabilité climatique Paléoclimat Bases de données Analyse du signal [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2018 ftnormandieuniv 2024-03-21T16:58:04Z The temperature increase during the 1850-2012 period is not uniform globally and the Arctic is warming twice as much as the average. However, the short time coverage of instrumental data makes it difficult to distinguish natural climate variability and anthropogenic forcing. The study of climatic variability "free" of human influence requires the use of proxies data measured in continental and marine palaeoclimatic archives. In the Arctic-subarctic region, high resolution records have been centralized in the Arctic 2k PAGES database. The objectives of this work are to improve the characterization and interpretation of climatic variability over the last 2000 years, going beyond the millennial trend and the major climatic periods, but also by focusing on the role and spatial expression of the internal variability of the climate system. This thesis is based on the Arctic 2k PAGES database, which allows the study of temperature variations in the Arctic-subarctic region, as well as a new database to reconstruct hydroclimatic variations (precipitation and humidity) in the region and created during this study. The use of climate signal analysis methods on regional records calculated from these two databases has highlighted climate variability in the Arctic-subarctic region from the multi-decadal to millennial scales.In particular, multi-decadal variability is related to the internal variability of the climate system. The hydroclimatic and temperature variations expressed at multi-decadal scales in the region are characterized by frequencies specific to regional climate oscillations (North Atlantic oscillation and decadal Pacific oscillation), particularly over the last 200 years. The work done on the temperature database and the reflection on the creation and exploitation of the hydroclimatic database have also led to the definition of a working methodology with a palaeoclimatic database, from its construction to the definition of its limits, in particular in terms of the spatial representability of the series ... Doctoral or Postdoctoral Thesis Arctic Arctique* North Atlantic North Atlantic oscillation Subarctic subarctique* Normandie Université: HAL Arctic Pacific |
institution |
Open Polar |
collection |
Normandie Université: HAL |
op_collection_id |
ftnormandieuniv |
language |
French |
topic |
Arctic Climate variability Paleoclimate Databases Signal analysis Arctique Variabilité climatique Paléoclimat Bases de données Analyse du signal [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Arctic Climate variability Paleoclimate Databases Signal analysis Arctique Variabilité climatique Paléoclimat Bases de données Analyse du signal [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Nicolle, Marie Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years |
topic_facet |
Arctic Climate variability Paleoclimate Databases Signal analysis Arctique Variabilité climatique Paléoclimat Bases de données Analyse du signal [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
The temperature increase during the 1850-2012 period is not uniform globally and the Arctic is warming twice as much as the average. However, the short time coverage of instrumental data makes it difficult to distinguish natural climate variability and anthropogenic forcing. The study of climatic variability "free" of human influence requires the use of proxies data measured in continental and marine palaeoclimatic archives. In the Arctic-subarctic region, high resolution records have been centralized in the Arctic 2k PAGES database. The objectives of this work are to improve the characterization and interpretation of climatic variability over the last 2000 years, going beyond the millennial trend and the major climatic periods, but also by focusing on the role and spatial expression of the internal variability of the climate system. This thesis is based on the Arctic 2k PAGES database, which allows the study of temperature variations in the Arctic-subarctic region, as well as a new database to reconstruct hydroclimatic variations (precipitation and humidity) in the region and created during this study. The use of climate signal analysis methods on regional records calculated from these two databases has highlighted climate variability in the Arctic-subarctic region from the multi-decadal to millennial scales.In particular, multi-decadal variability is related to the internal variability of the climate system. The hydroclimatic and temperature variations expressed at multi-decadal scales in the region are characterized by frequencies specific to regional climate oscillations (North Atlantic oscillation and decadal Pacific oscillation), particularly over the last 200 years. The work done on the temperature database and the reflection on the creation and exploitation of the hydroclimatic database have also led to the definition of a working methodology with a palaeoclimatic database, from its construction to the definition of its limits, in particular in terms of the spatial representability of the series ... |
author2 |
Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Normandie Université Nicolas Massei |
format |
Doctoral or Postdoctoral Thesis |
author |
Nicolle, Marie |
author_facet |
Nicolle, Marie |
author_sort |
Nicolle, Marie |
title |
Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years |
title_short |
Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years |
title_full |
Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years |
title_fullStr |
Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years |
title_full_unstemmed |
Multi-decadal to multi-secular hydroclimatic variability in the Arctic-subarctic since 2000 years |
title_sort |
multi-decadal to multi-secular hydroclimatic variability in the arctic-subarctic since 2000 years |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://theses.hal.science/tel-02076939 https://theses.hal.science/tel-02076939v2/document https://theses.hal.science/tel-02076939v2/file/marienicolle2.pdf |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Arctique* North Atlantic North Atlantic oscillation Subarctic subarctique* |
genre_facet |
Arctic Arctique* North Atlantic North Atlantic oscillation Subarctic subarctique* |
op_source |
https://theses.hal.science/tel-02076939 Sciences de la Terre. Normandie Université, 2018. Français. ⟨NNT : 2018NORMR129⟩ |
op_relation |
NNT: 2018NORMR129 tel-02076939 https://theses.hal.science/tel-02076939 https://theses.hal.science/tel-02076939v2/document https://theses.hal.science/tel-02076939v2/file/marienicolle2.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1796303000131600384 |