Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe
A statistically significant link is presented between atmospheric blocking located over the eastern North Atlantic and northern Europe and warm-season thunderstorm activity over western and central Europe. Lightning data from 2001 to 2014 were used to identify thunderstorm days and blocking events w...
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2019
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Online Access: | https://publikationen.bibliothek.kit.edu/1000096165 https://publikationen.bibliothek.kit.edu/1000096165/149684476 https://doi.org/10.5445/IR/1000096165 |
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ftubkarlsruhe:oai:EVASTAR-Karlsruhe.de:1000096165 2023-05-15T17:29:45+02:00 Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe Mohr, Susanna Wandel, Jan Lenggenhager, Sina Martius, Olivia 2019-07-03 application/pdf https://publikationen.bibliothek.kit.edu/1000096165 https://publikationen.bibliothek.kit.edu/1000096165/149684476 https://doi.org/10.5445/IR/1000096165 eng eng John Wiley and Sons info:eu-repo/semantics/altIdentifier/wos/000478375400001 info:eu-repo/semantics/altIdentifier/doi/10.1002/qj.3603 info:eu-repo/semantics/altIdentifier/issn/0035-9009 info:eu-repo/semantics/altIdentifier/issn/1477-870X https://publikationen.bibliothek.kit.edu/1000096165 https://publikationen.bibliothek.kit.edu/1000096165/149684476 https://doi.org/10.5445/IR/1000096165 KITopen License, https://publikationen.bibliothek.kit.edu/kitopen-lizenz info:eu-repo/semantics/openAccess Quarterly journal of the Royal Meteorological Society, 145 (724), 3040-3056 ISSN: 0035-9009, 1477-870X ddc:550 Earth sciences info:eu-repo/classification/ddc/550 doc-type:article Text info:eu-repo/semantics/article article info:eu-repo/semantics/acceptedVersion 2019 ftubkarlsruhe https://doi.org/10.5445/IR/1000096165 https://doi.org/10.1002/qj.3603 2022-11-27T23:10:05Z A statistically significant link is presented between atmospheric blocking located over the eastern North Atlantic and northern Europe and warm-season thunderstorm activity over western and central Europe. Lightning data from 2001 to 2014 were used to identify thunderstorm days and blocking events were extracted from the ERA-Interim reanalysis using an objective identification algorithm. The statistical link between the two phenomena is established through odds ratio analysis. Two areas – one over the eastern part of the North Atlantic and one over the Baltic Sea – were identified as locations where blocking influences the occurrence of deep moist convection in parts of western and central Europe. Based on the mean ambient conditions on days with blocking in these two areas, well-known dynamic and thermodynamic mechanisms supporting or suppressing the development of thunderstorms were confirmed. The anticyclonic circulation of a block over the eastern part of the North Atlantic leads to a northerly to northwesterly advection of dry and stable air masses into Europe on the eastern flank of the block. In addition, these environmental conditions are on average associated with large-scale subsidence of air masses (convection-inhibiting conditions). In contrast, the southerly to southwesterly advection of warm, moist and unstable air masses on the western flank of a block over the Baltic Sea results in convection-favouring conditions over western and central Europe. Both blocking situations are on average associated with weak wind speeds at mid-tropospheric levels and with weak wind shear. As a consequence, thunderstorms related to atmospheric blocking over the Baltic Sea tend to be on average less organised. Article in Journal/Newspaper North Atlantic KITopen (Karlsruhe Institute of Technologie) |
institution |
Open Polar |
collection |
KITopen (Karlsruhe Institute of Technologie) |
op_collection_id |
ftubkarlsruhe |
language |
English |
topic |
ddc:550 Earth sciences info:eu-repo/classification/ddc/550 |
spellingShingle |
ddc:550 Earth sciences info:eu-repo/classification/ddc/550 Mohr, Susanna Wandel, Jan Lenggenhager, Sina Martius, Olivia Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe |
topic_facet |
ddc:550 Earth sciences info:eu-repo/classification/ddc/550 |
description |
A statistically significant link is presented between atmospheric blocking located over the eastern North Atlantic and northern Europe and warm-season thunderstorm activity over western and central Europe. Lightning data from 2001 to 2014 were used to identify thunderstorm days and blocking events were extracted from the ERA-Interim reanalysis using an objective identification algorithm. The statistical link between the two phenomena is established through odds ratio analysis. Two areas – one over the eastern part of the North Atlantic and one over the Baltic Sea – were identified as locations where blocking influences the occurrence of deep moist convection in parts of western and central Europe. Based on the mean ambient conditions on days with blocking in these two areas, well-known dynamic and thermodynamic mechanisms supporting or suppressing the development of thunderstorms were confirmed. The anticyclonic circulation of a block over the eastern part of the North Atlantic leads to a northerly to northwesterly advection of dry and stable air masses into Europe on the eastern flank of the block. In addition, these environmental conditions are on average associated with large-scale subsidence of air masses (convection-inhibiting conditions). In contrast, the southerly to southwesterly advection of warm, moist and unstable air masses on the western flank of a block over the Baltic Sea results in convection-favouring conditions over western and central Europe. Both blocking situations are on average associated with weak wind speeds at mid-tropospheric levels and with weak wind shear. As a consequence, thunderstorms related to atmospheric blocking over the Baltic Sea tend to be on average less organised. |
format |
Article in Journal/Newspaper |
author |
Mohr, Susanna Wandel, Jan Lenggenhager, Sina Martius, Olivia |
author_facet |
Mohr, Susanna Wandel, Jan Lenggenhager, Sina Martius, Olivia |
author_sort |
Mohr, Susanna |
title |
Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe |
title_short |
Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe |
title_full |
Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe |
title_fullStr |
Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe |
title_full_unstemmed |
Relationship between atmospheric blocking and warm season thunderstorms over western and central Europe |
title_sort |
relationship between atmospheric blocking and warm season thunderstorms over western and central europe |
publisher |
John Wiley and Sons |
publishDate |
2019 |
url |
https://publikationen.bibliothek.kit.edu/1000096165 https://publikationen.bibliothek.kit.edu/1000096165/149684476 https://doi.org/10.5445/IR/1000096165 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quarterly journal of the Royal Meteorological Society, 145 (724), 3040-3056 ISSN: 0035-9009, 1477-870X |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000478375400001 info:eu-repo/semantics/altIdentifier/doi/10.1002/qj.3603 info:eu-repo/semantics/altIdentifier/issn/0035-9009 info:eu-repo/semantics/altIdentifier/issn/1477-870X https://publikationen.bibliothek.kit.edu/1000096165 https://publikationen.bibliothek.kit.edu/1000096165/149684476 https://doi.org/10.5445/IR/1000096165 |
op_rights |
KITopen License, https://publikationen.bibliothek.kit.edu/kitopen-lizenz info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5445/IR/1000096165 https://doi.org/10.1002/qj.3603 |
_version_ |
1766124546225602560 |