Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network
Water vapour is a key component of the Earth’s climate system, and its distribution and variability are sources of uncertainty in climate models. The use of long-term integrated water vapour (IWV) observations and reanalyses can help in their assessment. This work pioneered the use of reprocessed GP...
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Other Authors: | , , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://tel.archives-ouvertes.fr/tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083/document https://tel.archives-ouvertes.fr/tel-01881083/file/these_archivage_3477306o.pdf |
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ftccsdartic:oai:HAL:tel-01881083v1 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
GPS meteorology Integrated water vapour Atmospheric model Contenus intégrés en vapeur d'eau Météorologie GPS Réanalyses atmosphériques Tendances Variabilité climatique Modèle atmosphérique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
GPS meteorology Integrated water vapour Atmospheric model Contenus intégrés en vapeur d'eau Météorologie GPS Réanalyses atmosphériques Tendances Variabilité climatique Modèle atmosphérique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Bernardes Parracho, Ana Claudia Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
topic_facet |
GPS meteorology Integrated water vapour Atmospheric model Contenus intégrés en vapeur d'eau Météorologie GPS Réanalyses atmosphériques Tendances Variabilité climatique Modèle atmosphérique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
Water vapour is a key component of the Earth’s climate system, and its distribution and variability are sources of uncertainty in climate models. The use of long-term integrated water vapour (IWV) observations and reanalyses can help in their assessment. This work pioneered the use of reprocessed GPS IWV data for 1995-2010, converted from estimates of Zenith Total Delay. The conversion was assessed, with the goal of producing a high quality long-term IWV data set. Due to uncertainties in the GPS observations and homogeneity concerns, a global comparison with ERA-Interim reanalysis data was made. Although a general good agreement in means, variability and trends was found, issues in both data sets were highlighted. In GPS, gaps and inhomogeneities in the time series were evidenced, as well as representativeness differences in coastal areas and regions of complex topography. In ERA-Interim, too strong trends in certain regions were found. ERA-Interim was also compared with other reanalyses (MERRA-2, ERA-20C, 20CR), and differences were found in the IWV trends over Africa, Australia, and Antarctica. Finally, GPS and ERA-Interim IWV were used to assess four configurations of the LMDZ atmospheric general circulation model with two different physics and with or without nudging towards ERA-Interim wind fields. Impact of the model physics on the IWV mean was found, with the new physics being moister at tropical latitudes. Overall, the model free runs in both physics have difficulty reproducing the trends and variability observed in ERA-Interim and GPS. This is improved with the nudging, which confirms the importance of large-scale dynamics on IWV trends and variability. La vapeur d'eau est une composante clé du système climatique. Sa distribution et sa variabilité sont des sources d'incertitude dans les modèles climatiques. L'utilisation d'observations et des réanalyses des Contenus Intégrés en Vapeur d'Eau (CIVE) peut faciliter leur évaluation. Dans ce travail, des données CIVE-GPS retraitées du réseau mondial ont ... |
author2 |
LAboratoire de REcherche en Géodésie Paris (LAREG) Laboratoire des Sciences et Technologies de l'Information Géographique (LaSTIG) École nationale des sciences géographiques (ENSG) Institut National de l'Information Géographique et Forestière IGN (IGN)-Institut National de l'Information Géographique et Forestière IGN (IGN)-École nationale des sciences géographiques (ENSG) Institut National de l'Information Géographique et Forestière IGN (IGN)-Institut National de l'Information Géographique et Forestière IGN (IGN) Université Pierre et Marie Curie - Paris VI Sophie Bastin Olivier Bock |
format |
Doctoral or Postdoctoral Thesis |
author |
Bernardes Parracho, Ana Claudia |
author_facet |
Bernardes Parracho, Ana Claudia |
author_sort |
Bernardes Parracho, Ana Claudia |
title |
Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
title_short |
Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
title_full |
Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
title_fullStr |
Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
title_full_unstemmed |
Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
title_sort |
study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://tel.archives-ouvertes.fr/tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083/document https://tel.archives-ouvertes.fr/tel-01881083/file/these_archivage_3477306o.pdf |
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ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Merra |
geographic_facet |
Merra |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
https://tel.archives-ouvertes.fr/tel-01881083 Climatology. Université Pierre et Marie Curie - Paris VI, 2017. English. ⟨NNT : 2017PA066524⟩ |
op_relation |
NNT: 2017PA066524 tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083/document https://tel.archives-ouvertes.fr/tel-01881083/file/these_archivage_3477306o.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766126693631655936 |
spelling |
ftccsdartic:oai:HAL:tel-01881083v1 2023-05-15T13:39:59+02:00 Study of trends and variability of atmospheric water vapour with climate models and observations from global gnss network Etude de la tendance et de la variabilité de la vapeur d'eau atmosphérique à l'aide de modèles de climat et d'observations du réseau GNSS mondial Bernardes Parracho, Ana Claudia LAboratoire de REcherche en Géodésie Paris (LAREG) Laboratoire des Sciences et Technologies de l'Information Géographique (LaSTIG) École nationale des sciences géographiques (ENSG) Institut National de l'Information Géographique et Forestière IGN (IGN)-Institut National de l'Information Géographique et Forestière IGN (IGN)-École nationale des sciences géographiques (ENSG) Institut National de l'Information Géographique et Forestière IGN (IGN)-Institut National de l'Information Géographique et Forestière IGN (IGN) Université Pierre et Marie Curie - Paris VI Sophie Bastin Olivier Bock 2017-12-12 https://tel.archives-ouvertes.fr/tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083/document https://tel.archives-ouvertes.fr/tel-01881083/file/these_archivage_3477306o.pdf en eng HAL CCSD NNT: 2017PA066524 tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083 https://tel.archives-ouvertes.fr/tel-01881083/document https://tel.archives-ouvertes.fr/tel-01881083/file/these_archivage_3477306o.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-01881083 Climatology. Université Pierre et Marie Curie - Paris VI, 2017. English. ⟨NNT : 2017PA066524⟩ GPS meteorology Integrated water vapour Atmospheric model Contenus intégrés en vapeur d'eau Météorologie GPS Réanalyses atmosphériques Tendances Variabilité climatique Modèle atmosphérique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/doctoralThesis Theses 2017 ftccsdartic 2021-09-04T23:04:45Z Water vapour is a key component of the Earth’s climate system, and its distribution and variability are sources of uncertainty in climate models. The use of long-term integrated water vapour (IWV) observations and reanalyses can help in their assessment. This work pioneered the use of reprocessed GPS IWV data for 1995-2010, converted from estimates of Zenith Total Delay. The conversion was assessed, with the goal of producing a high quality long-term IWV data set. Due to uncertainties in the GPS observations and homogeneity concerns, a global comparison with ERA-Interim reanalysis data was made. Although a general good agreement in means, variability and trends was found, issues in both data sets were highlighted. In GPS, gaps and inhomogeneities in the time series were evidenced, as well as representativeness differences in coastal areas and regions of complex topography. In ERA-Interim, too strong trends in certain regions were found. ERA-Interim was also compared with other reanalyses (MERRA-2, ERA-20C, 20CR), and differences were found in the IWV trends over Africa, Australia, and Antarctica. Finally, GPS and ERA-Interim IWV were used to assess four configurations of the LMDZ atmospheric general circulation model with two different physics and with or without nudging towards ERA-Interim wind fields. Impact of the model physics on the IWV mean was found, with the new physics being moister at tropical latitudes. Overall, the model free runs in both physics have difficulty reproducing the trends and variability observed in ERA-Interim and GPS. This is improved with the nudging, which confirms the importance of large-scale dynamics on IWV trends and variability. La vapeur d'eau est une composante clé du système climatique. Sa distribution et sa variabilité sont des sources d'incertitude dans les modèles climatiques. L'utilisation d'observations et des réanalyses des Contenus Intégrés en Vapeur d'Eau (CIVE) peut faciliter leur évaluation. Dans ce travail, des données CIVE-GPS retraitées du réseau mondial ont ... Doctoral or Postdoctoral Thesis Antarc* Antarctica Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Merra ENVELOPE(12.615,12.615,65.816,65.816) |