Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones
During the past century, several extreme summer floods in Central Europe were associated with so-called Vb-cyclones propagating from the Mediterranean Sea north-eastward to Central Europe. The processes intensifying the precipitation in synoptic situations with Vb-cyclones in the Danube, Elbe, and O...
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ftunivfrankfurt:oai:publikationen.ub.uni-frankfurt.de:69587 2023-12-17T10:46:53+01:00 Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones Hoff, Amelie Simone Scholder-Aemisegger, Franziska Sprenger, Michael Ahrens, Bodo 2022-04-25 application/zip http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69587 https://nbn-resolving.org/urn:nbn:de:hebis:30:3-695877 https://doi.org/10.1007/s00382-022-06256-7 http://publikationen.ub.uni-frankfurt.de/files/69587/container.zip eng eng http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69587 urn:nbn:de:hebis:30:3-695877 https://nbn-resolving.org/urn:nbn:de:hebis:30:3-695877 https://doi.org/10.1007/s00382-022-06256-7 http://publikationen.ub.uni-frankfurt.de/files/69587/container.zip https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/restrictedAccess ddc:550 article doc-type:article 2022 ftunivfrankfurt https://doi.org/10.1007/s00382-022-06256-7 2023-11-19T23:42:31Z During the past century, several extreme summer floods in Central Europe were associated with so-called Vb-cyclones propagating from the Mediterranean Sea north-eastward to Central Europe. The processes intensifying the precipitation in synoptic situations with Vb-cyclones in the Danube, Elbe, and Odra catchments are only partially understood. Our study aims to investigate these processes with Lagrangian moisture-source diagnostics for 16 selected Vb-events. Moreover, we analyse the characteristics of typical moisture source regions during 1107 Vb-events from 1901 to 2010 based on ERA-20C reanalysis dynamically downscaled with COSMO-CLM+NEMO. We observe moisture contributions by various source regions highlighting the complex dynamical interplay of different air masses leading to moisture convergence in synoptic situations with Vb-cyclones. Overall, up to 80% of the precipitation originates from the European continent, indicating the importance of continental moisture recycling, especially within the respective river catchment. Other major moisture uptake regions are the North Sea, the Baltic Sea, the North Atlantic, and for a few events the Black Sea. Remarkably, anomalies in these oceanic source regions show no connection to precipitation amounts in synoptic situations with Vb-cyclones. In contrast, the Vb-cyclones with the highest precipitation are associated with anomalously high evaporation in the Mediterranean Sea, even though the Mediterranean Sea is only a minor moisture source region on average. Interestingly, the evaporation anomalies are not connected with sea-surface temperature but with wind-speed anomalies (Spearman’s rank correlation coefficient R≈0.7, significant with p<0.01) indicating mainly dynamically driven evaporation. The particular role of the Mediterranean Sea hints towards possible importance of Mediterranean moisture for the early-stage intensification of Vb-cyclones and the pre-moistening of the continental uptake regions upstream of the target catchments. Article in Journal/Newspaper North Atlantic Publication Server of Goethe University Frankfurt am Main Climate Dynamics 59 11-12 3227 3245 |
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Open Polar |
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Publication Server of Goethe University Frankfurt am Main |
op_collection_id |
ftunivfrankfurt |
language |
English |
topic |
ddc:550 |
spellingShingle |
ddc:550 Hoff, Amelie Simone Scholder-Aemisegger, Franziska Sprenger, Michael Ahrens, Bodo Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones |
topic_facet |
ddc:550 |
description |
During the past century, several extreme summer floods in Central Europe were associated with so-called Vb-cyclones propagating from the Mediterranean Sea north-eastward to Central Europe. The processes intensifying the precipitation in synoptic situations with Vb-cyclones in the Danube, Elbe, and Odra catchments are only partially understood. Our study aims to investigate these processes with Lagrangian moisture-source diagnostics for 16 selected Vb-events. Moreover, we analyse the characteristics of typical moisture source regions during 1107 Vb-events from 1901 to 2010 based on ERA-20C reanalysis dynamically downscaled with COSMO-CLM+NEMO. We observe moisture contributions by various source regions highlighting the complex dynamical interplay of different air masses leading to moisture convergence in synoptic situations with Vb-cyclones. Overall, up to 80% of the precipitation originates from the European continent, indicating the importance of continental moisture recycling, especially within the respective river catchment. Other major moisture uptake regions are the North Sea, the Baltic Sea, the North Atlantic, and for a few events the Black Sea. Remarkably, anomalies in these oceanic source regions show no connection to precipitation amounts in synoptic situations with Vb-cyclones. In contrast, the Vb-cyclones with the highest precipitation are associated with anomalously high evaporation in the Mediterranean Sea, even though the Mediterranean Sea is only a minor moisture source region on average. Interestingly, the evaporation anomalies are not connected with sea-surface temperature but with wind-speed anomalies (Spearman’s rank correlation coefficient R≈0.7, significant with p<0.01) indicating mainly dynamically driven evaporation. The particular role of the Mediterranean Sea hints towards possible importance of Mediterranean moisture for the early-stage intensification of Vb-cyclones and the pre-moistening of the continental uptake regions upstream of the target catchments. |
format |
Article in Journal/Newspaper |
author |
Hoff, Amelie Simone Scholder-Aemisegger, Franziska Sprenger, Michael Ahrens, Bodo |
author_facet |
Hoff, Amelie Simone Scholder-Aemisegger, Franziska Sprenger, Michael Ahrens, Bodo |
author_sort |
Hoff, Amelie Simone |
title |
Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones |
title_short |
Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones |
title_full |
Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones |
title_fullStr |
Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones |
title_full_unstemmed |
Moisture sources of heavy precipitation in Central Europe in synoptic situations with Vb-cyclones |
title_sort |
moisture sources of heavy precipitation in central europe in synoptic situations with vb-cyclones |
publishDate |
2022 |
url |
http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69587 https://nbn-resolving.org/urn:nbn:de:hebis:30:3-695877 https://doi.org/10.1007/s00382-022-06256-7 http://publikationen.ub.uni-frankfurt.de/files/69587/container.zip |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69587 urn:nbn:de:hebis:30:3-695877 https://nbn-resolving.org/urn:nbn:de:hebis:30:3-695877 https://doi.org/10.1007/s00382-022-06256-7 http://publikationen.ub.uni-frankfurt.de/files/69587/container.zip |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00382-022-06256-7 |
container_title |
Climate Dynamics |
container_volume |
59 |
container_issue |
11-12 |
container_start_page |
3227 |
op_container_end_page |
3245 |
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1785570540354797568 |