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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ftnilu:oai:nilu.brage.unit.no:11250/2992746 2023-07-30T04:05:32+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/11250/2992746 https://doi.org/10.1016/j.wace.2021.100370 eng eng Norges forskningsråd: 295046 Weather and Climate Extremes. 2021, 34, 100370. urn:issn:2212-0947 https://hdl.handle.net/11250/2992746 https://doi.org/10.1016/j.wace.2021.100370 cristin:1932118 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. Published by Elsevier B.V. 15 34 Weather and Climate Extremes 100370 Peer reviewed Journal article 2021 ftnilu https://doi.org/10.1016/j.wace.2021.100370 2023-07-08T19:54:29Z 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 NILU – Norwegian Institute for Air Research: NILU Brage Landfall Point ENVELOPE(-113.623,-113.623,68.932,68.932) Norway Weather and Climate Extremes 34 100370 |
institution |
Open Polar |
collection |
NILU – Norwegian Institute for Air Research: NILU Brage |
op_collection_id |
ftnilu |
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 |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2992746 https://doi.org/10.1016/j.wace.2021.100370 |
long_lat |
ENVELOPE(-113.623,-113.623,68.932,68.932) |
geographic |
Landfall Point Norway |
geographic_facet |
Landfall Point Norway |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
15 34 Weather and Climate Extremes 100370 |
op_relation |
Norges forskningsråd: 295046 Weather and Climate Extremes. 2021, 34, 100370. urn:issn:2212-0947 https://hdl.handle.net/11250/2992746 https://doi.org/10.1016/j.wace.2021.100370 cristin:1932118 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. Published by Elsevier B.V. |
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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1772817514033577984 |