A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region
International audience We present a novel climatology of upper-tropospheric troughs and associated precipitation in the Mediterranean region, using 6 years (2001–2006) of Advanced Microwave Sounding Unit data. Troughs are more frequent or persistent during November through March in the whole of the...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Online Access: | https://hal.archives-ouvertes.fr/hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337/document https://hal.archives-ouvertes.fr/hal-00562337/file/2008JD009918.pdf https://doi.org/10.1029/2008JD009918 |
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ftccsdartic:oai:HAL:hal-00562337v1 |
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openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Mediterranean climate precipitation upper-level troughs [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
Mediterranean climate precipitation upper-level troughs [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Funatsu, Beatriz M. Claud, C. Chaboureau, Jean-Pierre A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region |
topic_facet |
Mediterranean climate precipitation upper-level troughs [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience We present a novel climatology of upper-tropospheric troughs and associated precipitation in the Mediterranean region, using 6 years (2001–2006) of Advanced Microwave Sounding Unit data. Troughs are more frequent or persistent during November through March in the whole of the Mediterranean basin, with up to 25% of days in the northwestern part of the basin. The interannual variability of number of intrusions is stronger from September through June. During summer, the variability is reduced, except in the NW region, and no troughs were observed in the SE region. Moderate precipitation occurs in at least 60% of the cases when an upper-level trough is present with weak seasonal dependency. In the southern Mediterranean moderate precipitation is an ubiquitous feature and presents small year-to-year fluctuations. The occurrence of deep convective rain associated with trough is lower, around 50%, and reduces to 20% in the northern part of the basin during winter. This occurrence varies a lot with individual years, especially in the southern Mediterranean. Upper-level troughs have more often a N–S orientation but, while no particular dependency of frequency of precipitation (whether moderate or convective) on their inclination was found, the location of precipitation is generally favored downstream. The North Atlantic Oscillation and Scandinavia patterns were found to be the most important large-scale circulation modes influencing the variability of number of intrusions, but the East Atlantic/West Russia and East Atlantic patterns are also important in the southeast region. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) Laboratoire d'aérologie (LAERO) Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées |
format |
Article in Journal/Newspaper |
author |
Funatsu, Beatriz M. Claud, C. Chaboureau, Jean-Pierre |
author_facet |
Funatsu, Beatriz M. Claud, C. Chaboureau, Jean-Pierre |
author_sort |
Funatsu, Beatriz M. |
title |
A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region |
title_short |
A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region |
title_full |
A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region |
title_fullStr |
A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region |
title_full_unstemmed |
A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region |
title_sort |
6-year amsu-based climatology of upper-level troughs and associated precipitation distribution in the mediterranean region |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337/document https://hal.archives-ouvertes.fr/hal-00562337/file/2008JD009918.pdf https://doi.org/10.1029/2008JD009918 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.archives-ouvertes.fr/hal-00562337 Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2008, 113 (D15), pp.D15120. ⟨10.1029/2008JD009918⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JD009918 hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337/document https://hal.archives-ouvertes.fr/hal-00562337/file/2008JD009918.pdf doi:10.1029/2008JD009918 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2008JD009918 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
D15 |
_version_ |
1766134465606713344 |
spelling |
ftccsdartic:oai:HAL:hal-00562337v1 2023-05-15T17:35:20+02:00 A 6-year AMSU-based climatology of upper-level troughs and associated precipitation distribution in the Mediterranean region Funatsu, Beatriz M. Claud, C. Chaboureau, Jean-Pierre Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) Laboratoire d'aérologie (LAERO) Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées 2008 https://hal.archives-ouvertes.fr/hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337/document https://hal.archives-ouvertes.fr/hal-00562337/file/2008JD009918.pdf https://doi.org/10.1029/2008JD009918 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JD009918 hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337 https://hal.archives-ouvertes.fr/hal-00562337/document https://hal.archives-ouvertes.fr/hal-00562337/file/2008JD009918.pdf doi:10.1029/2008JD009918 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.archives-ouvertes.fr/hal-00562337 Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2008, 113 (D15), pp.D15120. ⟨10.1029/2008JD009918⟩ Mediterranean climate precipitation upper-level troughs [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1029/2008JD009918 2021-12-25T23:33:07Z International audience We present a novel climatology of upper-tropospheric troughs and associated precipitation in the Mediterranean region, using 6 years (2001–2006) of Advanced Microwave Sounding Unit data. Troughs are more frequent or persistent during November through March in the whole of the Mediterranean basin, with up to 25% of days in the northwestern part of the basin. The interannual variability of number of intrusions is stronger from September through June. During summer, the variability is reduced, except in the NW region, and no troughs were observed in the SE region. Moderate precipitation occurs in at least 60% of the cases when an upper-level trough is present with weak seasonal dependency. In the southern Mediterranean moderate precipitation is an ubiquitous feature and presents small year-to-year fluctuations. The occurrence of deep convective rain associated with trough is lower, around 50%, and reduces to 20% in the northern part of the basin during winter. This occurrence varies a lot with individual years, especially in the southern Mediterranean. Upper-level troughs have more often a N–S orientation but, while no particular dependency of frequency of precipitation (whether moderate or convective) on their inclination was found, the location of precipitation is generally favored downstream. The North Atlantic Oscillation and Scandinavia patterns were found to be the most important large-scale circulation modes influencing the variability of number of intrusions, but the East Atlantic/West Russia and East Atlantic patterns are also important in the southeast region. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Geophysical Research 113 D15 |