Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones
International audience One of the multiple approaches currently explored to mitigate the effects of hydro-meteorological hazardous events aims at improving the numerical weather forecasts. Under an ever increasing societal demand for cost cuts and more precise forecasts, targeted observations are cu...
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ftccsdartic:oai:HAL:hal-00301685v1 2023-05-15T17:34:31+02:00 Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones Homar, V. Jansà, A. Campins, J. Genovés, A. Ramis, C. Meteorology Group Centro Meteorológico en Illes Balears Centro Meteorologico en Illes Balears 2007-07-13 https://hal.archives-ouvertes.fr/hal-00301685 https://hal.archives-ouvertes.fr/hal-00301685/document https://hal.archives-ouvertes.fr/hal-00301685/file/nhess-7-445-2007.pdf en eng HAL CCSD Copernicus Publ. / European Geosciences Union hal-00301685 https://hal.archives-ouvertes.fr/hal-00301685 https://hal.archives-ouvertes.fr/hal-00301685/document https://hal.archives-ouvertes.fr/hal-00301685/file/nhess-7-445-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1561-8633 EISSN: 1684-9981 Natural Hazards and Earth System Sciences https://hal.archives-ouvertes.fr/hal-00301685 Natural Hazards and Earth System Sciences, Copernicus Publ. / European Geosciences Union, 2007, 7 (4), pp.445-454 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2021-08-21T23:04:12Z International audience One of the multiple approaches currently explored to mitigate the effects of hydro-meteorological hazardous events aims at improving the numerical weather forecasts. Under an ever increasing societal demand for cost cuts and more precise forecasts, targeted observations are currently receiving great attention within the operational weather community. The MEDEX project (http://medex.inm.uib.es) is aimed at improving the forecasts of high impact weather (HIW) in the Mediterranean and, in particular, proposes the creation of a climatology of sensitivities of such episodes. The construction of a comprehensive climatology of sensitivities is hampered by the lack of an exhaustive collection of Mediterranean HIW events. In this study we contribute with a systematic climatology of Mediterranean intense cyclones. We perform an objective cluster analysis of intense cyclones detected from the ECMWF ERA40 reanalysis using a k-means algorithm and compute the sensitivities for each of the resulting classes. For each cluster, a representative sensitivity field is computed using the MM5 Adjoint Modeling system. The results show that although the sensitive areas for intense Mediterranean cyclones are not particularly confined, it is remarkable how areas poorly sampled by the regular observing networks, such as North Africa, the Mediterranean Sea and the eastern North-Atlantic, are highlighted in the prototype sensitivity maps. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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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 |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Homar, V. Jansà, A. Campins, J. Genovés, A. Ramis, C. Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience One of the multiple approaches currently explored to mitigate the effects of hydro-meteorological hazardous events aims at improving the numerical weather forecasts. Under an ever increasing societal demand for cost cuts and more precise forecasts, targeted observations are currently receiving great attention within the operational weather community. The MEDEX project (http://medex.inm.uib.es) is aimed at improving the forecasts of high impact weather (HIW) in the Mediterranean and, in particular, proposes the creation of a climatology of sensitivities of such episodes. The construction of a comprehensive climatology of sensitivities is hampered by the lack of an exhaustive collection of Mediterranean HIW events. In this study we contribute with a systematic climatology of Mediterranean intense cyclones. We perform an objective cluster analysis of intense cyclones detected from the ECMWF ERA40 reanalysis using a k-means algorithm and compute the sensitivities for each of the resulting classes. For each cluster, a representative sensitivity field is computed using the MM5 Adjoint Modeling system. The results show that although the sensitive areas for intense Mediterranean cyclones are not particularly confined, it is remarkable how areas poorly sampled by the regular observing networks, such as North Africa, the Mediterranean Sea and the eastern North-Atlantic, are highlighted in the prototype sensitivity maps. |
author2 |
Meteorology Group Centro Meteorológico en Illes Balears Centro Meteorologico en Illes Balears |
format |
Article in Journal/Newspaper |
author |
Homar, V. Jansà, A. Campins, J. Genovés, A. Ramis, C. |
author_facet |
Homar, V. Jansà, A. Campins, J. Genovés, A. Ramis, C. |
author_sort |
Homar, V. |
title |
Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
title_short |
Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
title_full |
Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
title_fullStr |
Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
title_full_unstemmed |
Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
title_sort |
towards a systematic climatology of sensitivities of mediterranean high impact weather: a contribution based on intense cyclones |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.archives-ouvertes.fr/hal-00301685 https://hal.archives-ouvertes.fr/hal-00301685/document https://hal.archives-ouvertes.fr/hal-00301685/file/nhess-7-445-2007.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1561-8633 EISSN: 1684-9981 Natural Hazards and Earth System Sciences https://hal.archives-ouvertes.fr/hal-00301685 Natural Hazards and Earth System Sciences, Copernicus Publ. / European Geosciences Union, 2007, 7 (4), pp.445-454 |
op_relation |
hal-00301685 https://hal.archives-ouvertes.fr/hal-00301685 https://hal.archives-ouvertes.fr/hal-00301685/document https://hal.archives-ouvertes.fr/hal-00301685/file/nhess-7-445-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766133382710820864 |