Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean
The NW Mediterranean coast is highly susceptible to the impacts of extreme rainstorms and coastal storms, which often lead to flash floods, coastal erosion, and flooding across a highly urbanised territory. Often, these storms occur simultaneously, resulting in compound events that intensify local i...
Published in: | Hydrology and Earth System Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2024
|
Subjects: | |
Online Access: | https://doi.org/10.5194/hess-28-283-2024 https://doaj.org/article/ea74cedee458441195a7a62701c5a638 |
id |
ftdoajarticles:oai:doaj.org/article:ea74cedee458441195a7a62701c5a638 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:ea74cedee458441195a7a62701c5a638 2024-02-11T10:06:46+01:00 Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean M. Sanuy J. C. Peña S. Assimenidis J. A. Jiménez 2024-01-01T00:00:00Z https://doi.org/10.5194/hess-28-283-2024 https://doaj.org/article/ea74cedee458441195a7a62701c5a638 EN eng Copernicus Publications https://hess.copernicus.org/articles/28/283/2024/hess-28-283-2024.pdf https://doaj.org/toc/1027-5606 https://doaj.org/toc/1607-7938 doi:10.5194/hess-28-283-2024 1027-5606 1607-7938 https://doaj.org/article/ea74cedee458441195a7a62701c5a638 Hydrology and Earth System Sciences, Vol 28, Pp 283-302 (2024) Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2024 ftdoajarticles https://doi.org/10.5194/hess-28-283-2024 2024-01-21T01:37:58Z The NW Mediterranean coast is highly susceptible to the impacts of extreme rainstorms and coastal storms, which often lead to flash floods, coastal erosion, and flooding across a highly urbanised territory. Often, these storms occur simultaneously, resulting in compound events that intensify local impacts when they happen in the same location or spread impacts across the territory when they occur in different areas. These multivariate and spatially compound events present significant challenges for risk management, potentially overwhelming emergency services. In this study, we analysed the prevailing atmospheric conditions during various types of extreme episodes, aiming to create the first classification of synoptic weather patterns (SWPs) conducive to compound events involving heavy rainfall and storm waves in the Spanish NW Mediterranean. To achieve this, we developed a methodological framework that combines an objective synoptic classification method based on principal component analysis and k -means clustering with a Bayesian network. This methodology was applied to a dataset comprising 562 storm events recorded over 30 years, including 112 compound events. First, we used the framework to determine the optimal combination of domain size, classification variables, and number of clusters based on the synoptic skill to replicate local-scale values of daily rainfall and significant wave height. Subsequently, we identified SWPs associated with extreme compound events, which are often characterised by upper-level lows and trough structures in conjunction with Mediterranean cyclones, resulting in severe to extreme coastal storms combined with convective systems. The obtained classification demonstrated strong skill, with scores exceeding 0.4 when considering factors like seasonality or the North Atlantic Oscillation. These findings contribute to a broader understanding of compound terrestrial–maritime extreme events in the study area and have the potential to aid in the development of effective risk management ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Hydrology and Earth System Sciences 28 1 283 302 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 M. Sanuy J. C. Peña S. Assimenidis J. A. Jiménez Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean |
topic_facet |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
The NW Mediterranean coast is highly susceptible to the impacts of extreme rainstorms and coastal storms, which often lead to flash floods, coastal erosion, and flooding across a highly urbanised territory. Often, these storms occur simultaneously, resulting in compound events that intensify local impacts when they happen in the same location or spread impacts across the territory when they occur in different areas. These multivariate and spatially compound events present significant challenges for risk management, potentially overwhelming emergency services. In this study, we analysed the prevailing atmospheric conditions during various types of extreme episodes, aiming to create the first classification of synoptic weather patterns (SWPs) conducive to compound events involving heavy rainfall and storm waves in the Spanish NW Mediterranean. To achieve this, we developed a methodological framework that combines an objective synoptic classification method based on principal component analysis and k -means clustering with a Bayesian network. This methodology was applied to a dataset comprising 562 storm events recorded over 30 years, including 112 compound events. First, we used the framework to determine the optimal combination of domain size, classification variables, and number of clusters based on the synoptic skill to replicate local-scale values of daily rainfall and significant wave height. Subsequently, we identified SWPs associated with extreme compound events, which are often characterised by upper-level lows and trough structures in conjunction with Mediterranean cyclones, resulting in severe to extreme coastal storms combined with convective systems. The obtained classification demonstrated strong skill, with scores exceeding 0.4 when considering factors like seasonality or the North Atlantic Oscillation. These findings contribute to a broader understanding of compound terrestrial–maritime extreme events in the study area and have the potential to aid in the development of effective risk management ... |
format |
Article in Journal/Newspaper |
author |
M. Sanuy J. C. Peña S. Assimenidis J. A. Jiménez |
author_facet |
M. Sanuy J. C. Peña S. Assimenidis J. A. Jiménez |
author_sort |
M. Sanuy |
title |
Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean |
title_short |
Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean |
title_full |
Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean |
title_fullStr |
Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean |
title_full_unstemmed |
Synoptic weather patterns conducive to compound extreme rainfall–wave events in the NW Mediterranean |
title_sort |
synoptic weather patterns conducive to compound extreme rainfall–wave events in the nw mediterranean |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/hess-28-283-2024 https://doaj.org/article/ea74cedee458441195a7a62701c5a638 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Hydrology and Earth System Sciences, Vol 28, Pp 283-302 (2024) |
op_relation |
https://hess.copernicus.org/articles/28/283/2024/hess-28-283-2024.pdf https://doaj.org/toc/1027-5606 https://doaj.org/toc/1607-7938 doi:10.5194/hess-28-283-2024 1027-5606 1607-7938 https://doaj.org/article/ea74cedee458441195a7a62701c5a638 |
op_doi |
https://doi.org/10.5194/hess-28-283-2024 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
28 |
container_issue |
1 |
container_start_page |
283 |
op_container_end_page |
302 |
_version_ |
1790604692622934016 |