Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects
Extreme precipitation events in Norway in all seasons are often linked to atmospheric rivers (AR). We show that during the period 1979–2018 78.5% of the daily extreme precipitation events in Southwestern Norway are linked to ARs, this percentage decreasing to 59% in the more northern coastal regions...
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ftunivbergen:oai:bora.uib.no:11250/2777330 2023-05-15T17:35:03+02:00 Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects Michel, Clio Sorteberg, Asgeir Eckhardt, Sabine Weijenborg, Christian Stohl, Andreas Cassiani, Massimo 2021 application/pdf https://hdl.handle.net/11250/2777330 https://doi.org/10.1016/j.wace.2021.100370 eng eng Elsevier Norges forskningsråd: 295046 urn:issn:2212-0947 https://hdl.handle.net/11250/2777330 https://doi.org/10.1016/j.wace.2021.100370 cristin:1932118 Weather and Climate Extremes. 2021, 34, 100370. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 the authors 100370 Weather and Climate Extremes 34 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1016/j.wace.2021.100370 2023-03-14T17:44:54Z Extreme precipitation events in Norway in all seasons are often linked to atmospheric rivers (AR). We show that during the period 1979–2018 78.5% of the daily extreme precipitation events in Southwestern Norway are linked to ARs, this percentage decreasing to 59% in the more northern coastal regions and ~40% in the inland regions. The association of extreme precipitation with AR occurs most often in fall for the coastal areas and in summer inland. All Norwegian regions experience stronger winds and 1–2°C increase of the temperature at 850 hPa during AR events compared to the climatology, the extreme precipitation largely contributing to the wet climatology (only considering rainy days) in Norway but also in Denmark and Sweden when the rest of Europe is dry. A cyclone is found nearby the AR landfall point in 70% of the cases. When the cyclone is located over the British Isles, as it is typically the case when ARs reach Southeastern Norway, it is associated with cyclonic Rossby wave breaking whereas when the ARs reach more northern regions, anticyclonic wave breaking occurs over Northern Europe. Cyclone-centered composites show that the mean sea level pressure is not significantly different between the eight Norwegian regions, that baroclinic interaction can still take place although the cyclone is close to its decay phase and that the maximum precipitation occurs ahead of the AR. Lagrangian air parcel tracking shows that moisture uptake mainly occurs over the North Atlantic for the coastal regions with an additional source over Europe for the more eastern and inland regions. publishedVersion Article in Journal/Newspaper North Atlantic University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway Landfall Point ENVELOPE(-113.623,-113.623,68.932,68.932) Weather and Climate Extremes 34 100370 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Extreme precipitation events in Norway in all seasons are often linked to atmospheric rivers (AR). We show that during the period 1979–2018 78.5% of the daily extreme precipitation events in Southwestern Norway are linked to ARs, this percentage decreasing to 59% in the more northern coastal regions and ~40% in the inland regions. The association of extreme precipitation with AR occurs most often in fall for the coastal areas and in summer inland. All Norwegian regions experience stronger winds and 1–2°C increase of the temperature at 850 hPa during AR events compared to the climatology, the extreme precipitation largely contributing to the wet climatology (only considering rainy days) in Norway but also in Denmark and Sweden when the rest of Europe is dry. A cyclone is found nearby the AR landfall point in 70% of the cases. When the cyclone is located over the British Isles, as it is typically the case when ARs reach Southeastern Norway, it is associated with cyclonic Rossby wave breaking whereas when the ARs reach more northern regions, anticyclonic wave breaking occurs over Northern Europe. Cyclone-centered composites show that the mean sea level pressure is not significantly different between the eight Norwegian regions, that baroclinic interaction can still take place although the cyclone is close to its decay phase and that the maximum precipitation occurs ahead of the AR. Lagrangian air parcel tracking shows that moisture uptake mainly occurs over the North Atlantic for the coastal regions with an additional source over Europe for the more eastern and inland regions. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Michel, Clio Sorteberg, Asgeir Eckhardt, Sabine Weijenborg, Christian Stohl, Andreas Cassiani, Massimo |
spellingShingle |
Michel, Clio Sorteberg, Asgeir Eckhardt, Sabine Weijenborg, Christian Stohl, Andreas Cassiani, Massimo Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects |
author_facet |
Michel, Clio Sorteberg, Asgeir Eckhardt, Sabine Weijenborg, Christian Stohl, Andreas Cassiani, Massimo |
author_sort |
Michel, Clio |
title |
Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects |
title_short |
Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects |
title_full |
Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects |
title_fullStr |
Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects |
title_full_unstemmed |
Characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in Norway - Seasonal and regional aspects |
title_sort |
characterization of the atmospheric environment during extreme precipitation events associated with atmospheric rivers in norway - seasonal and regional aspects |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2777330 https://doi.org/10.1016/j.wace.2021.100370 |
long_lat |
ENVELOPE(-113.623,-113.623,68.932,68.932) |
geographic |
Norway Landfall Point |
geographic_facet |
Norway Landfall Point |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
100370 Weather and Climate Extremes 34 |
op_relation |
Norges forskningsråd: 295046 urn:issn:2212-0947 https://hdl.handle.net/11250/2777330 https://doi.org/10.1016/j.wace.2021.100370 cristin:1932118 Weather and Climate Extremes. 2021, 34, 100370. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 the authors |
op_doi |
https://doi.org/10.1016/j.wace.2021.100370 |
container_title |
Weather and Climate Extremes |
container_volume |
34 |
container_start_page |
100370 |
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1766134089300049920 |