A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas
Extreme cold weather events, such as the winter of 1962/63, the third coldest winter ever recorded in the Central England Temperature record, or more recently the winter of 2010/11, have significant consequences for the society and economy. This paper assesses the probability of such extreme cold we...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:3e4b5b65714c4bf683506c9dbe4aa73e 2023-05-15T17:32:01+02:00 A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas S. Koumoutsaris 2019-03-01 https://doi.org/10.5194/nhess-19-489-2019 https://www.nat-hazards-earth-syst-sci.net/19/489/2019/nhess-19-489-2019.pdf https://doaj.org/article/3e4b5b65714c4bf683506c9dbe4aa73e en eng Copernicus Publications doi:10.5194/nhess-19-489-2019 1561-8633 1684-9981 https://www.nat-hazards-earth-syst-sci.net/19/489/2019/nhess-19-489-2019.pdf https://doaj.org/article/3e4b5b65714c4bf683506c9dbe4aa73e undefined Natural Hazards and Earth System Sciences, Vol 19, Pp 489-506 (2019) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/nhess-19-489-2019 2023-01-22T19:28:48Z Extreme cold weather events, such as the winter of 1962/63, the third coldest winter ever recorded in the Central England Temperature record, or more recently the winter of 2010/11, have significant consequences for the society and economy. This paper assesses the probability of such extreme cold weather across the United Kingdom (UK), as part of a probabilistic catastrophe model for insured losses caused by the bursting of pipes. A statistical model is developed in order to model the extremes of the Air Freezing Index (AFI), which is a common measure of the magnitude and duration of freezing temperatures. A novel approach in the modelling of the spatial dependence of the hazard has been followed which takes advantage of the vine copula methodology. The method allows complex dependencies to be modelled, especially between the tails of the AFI distributions, which is important to assess the extreme behaviour of such events. The influence of the North Atlantic Oscillation and of anthropogenic climate change on the frequency of UK cold winters has also been taken into account. According to the model, the occurrence of extreme cold events, such as the 1962/63 winter, has decreased approximately 2 times during the course of the 20th century as a result of anthropogenic climate change. Furthermore, the model predicts that such an event is expected to become more uncommon, about 2 times less frequent, by the year 2030. Extreme cold spells in the UK have been found to be heavily modulated by the North Atlantic Oscillation (NAO) as well. A cold event is estimated to be ≈3–4 times more likely to occur during its negative phase than its positive phase. However, considerable uncertainty exists in these results, owing mainly to the short record length and the large interannual variability of the AFI. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Unknown Natural Hazards and Earth System Sciences 19 3 489 506 |
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geo envir S. Koumoutsaris A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas |
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geo envir |
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Extreme cold weather events, such as the winter of 1962/63, the third coldest winter ever recorded in the Central England Temperature record, or more recently the winter of 2010/11, have significant consequences for the society and economy. This paper assesses the probability of such extreme cold weather across the United Kingdom (UK), as part of a probabilistic catastrophe model for insured losses caused by the bursting of pipes. A statistical model is developed in order to model the extremes of the Air Freezing Index (AFI), which is a common measure of the magnitude and duration of freezing temperatures. A novel approach in the modelling of the spatial dependence of the hazard has been followed which takes advantage of the vine copula methodology. The method allows complex dependencies to be modelled, especially between the tails of the AFI distributions, which is important to assess the extreme behaviour of such events. The influence of the North Atlantic Oscillation and of anthropogenic climate change on the frequency of UK cold winters has also been taken into account. According to the model, the occurrence of extreme cold events, such as the 1962/63 winter, has decreased approximately 2 times during the course of the 20th century as a result of anthropogenic climate change. Furthermore, the model predicts that such an event is expected to become more uncommon, about 2 times less frequent, by the year 2030. Extreme cold spells in the UK have been found to be heavily modulated by the North Atlantic Oscillation (NAO) as well. A cold event is estimated to be ≈3–4 times more likely to occur during its negative phase than its positive phase. However, considerable uncertainty exists in these results, owing mainly to the short record length and the large interannual variability of the AFI. |
format |
Article in Journal/Newspaper |
author |
S. Koumoutsaris |
author_facet |
S. Koumoutsaris |
author_sort |
S. Koumoutsaris |
title |
A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas |
title_short |
A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas |
title_full |
A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas |
title_fullStr |
A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas |
title_full_unstemmed |
A hazard model of sub-freezing temperatures in the United Kingdom using vine copulas |
title_sort |
hazard model of sub-freezing temperatures in the united kingdom using vine copulas |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/nhess-19-489-2019 https://www.nat-hazards-earth-syst-sci.net/19/489/2019/nhess-19-489-2019.pdf https://doaj.org/article/3e4b5b65714c4bf683506c9dbe4aa73e |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Natural Hazards and Earth System Sciences, Vol 19, Pp 489-506 (2019) |
op_relation |
doi:10.5194/nhess-19-489-2019 1561-8633 1684-9981 https://www.nat-hazards-earth-syst-sci.net/19/489/2019/nhess-19-489-2019.pdf https://doaj.org/article/3e4b5b65714c4bf683506c9dbe4aa73e |
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op_doi |
https://doi.org/10.5194/nhess-19-489-2019 |
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Natural Hazards and Earth System Sciences |
container_volume |
19 |
container_issue |
3 |
container_start_page |
489 |
op_container_end_page |
506 |
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