Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data
The relationship between the frequency of River Ammer floods (southern Germany) and atmospheric circulation variability is investigated based on observational Ammer River discharge data back to 1926 and a flood layer time series from varved sediments of the downstream Lake Ammer for the pre-instrume...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_1466890 2023-05-15T17:33:39+02:00 Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data Rimbu, N. Czymzik, M. Ionita, M. Lohmann, G. Brauer, A. 2016 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890 https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890_3/component/file_1466893/1466890.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-12-377-2016 info:eu-repo/semantics/altIdentifier/urn/http://doi.crossref.org/servlet/query?format=unixref&pid=bib@gfz-potsdam.de&id=10.5194/cp-12-377-2016 https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890 https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890_3/component/file_1466893/1466890.pdf info:eu-repo/semantics/openAccess Climate of the Past info:eu-repo/semantics/article 2016 ftgfzpotsdam https://doi.org/10.5194/cp-12-377-2016 2022-09-14T05:56:36Z The relationship between the frequency of River Ammer floods (southern Germany) and atmospheric circulation variability is investigated based on observational Ammer River discharge data back to 1926 and a flood layer time series from varved sediments of the downstream Lake Ammer for the pre-instrumental period back to 1766. A composite analysis reveals that, at synoptic timescales, observed River Ammer floods are associated with enhanced moisture transport from the Atlantic Ocean and the Mediterranean towards the Ammer region, a pronounced trough over western Europe as well as enhanced potential vorticity at upper levels. We argue that this synoptic-scale configuration can trigger heavy precipitation and floods in the Ammer region. Interannual to multidecadal increases in flood frequency, as detected in the instrumental discharge record, are associated with a wave train pattern extending from the North Atlantic to western Asia, with a prominent negative center over western Europe. A similar atmospheric circulation pattern is associated with increases in flood layer frequency in the Lake Ammer sediment record during the pre-instrumental period. We argue that the complete flood layer time series from Lake Ammer sediments covering the last 5500 years contains information about atmospheric circulation variability on interannual to millennial timescales. Article in Journal/Newspaper North Atlantic GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Climate of the Past 12 2 377 385 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
The relationship between the frequency of River Ammer floods (southern Germany) and atmospheric circulation variability is investigated based on observational Ammer River discharge data back to 1926 and a flood layer time series from varved sediments of the downstream Lake Ammer for the pre-instrumental period back to 1766. A composite analysis reveals that, at synoptic timescales, observed River Ammer floods are associated with enhanced moisture transport from the Atlantic Ocean and the Mediterranean towards the Ammer region, a pronounced trough over western Europe as well as enhanced potential vorticity at upper levels. We argue that this synoptic-scale configuration can trigger heavy precipitation and floods in the Ammer region. Interannual to multidecadal increases in flood frequency, as detected in the instrumental discharge record, are associated with a wave train pattern extending from the North Atlantic to western Asia, with a prominent negative center over western Europe. A similar atmospheric circulation pattern is associated with increases in flood layer frequency in the Lake Ammer sediment record during the pre-instrumental period. We argue that the complete flood layer time series from Lake Ammer sediments covering the last 5500 years contains information about atmospheric circulation variability on interannual to millennial timescales. |
format |
Article in Journal/Newspaper |
author |
Rimbu, N. Czymzik, M. Ionita, M. Lohmann, G. Brauer, A. |
spellingShingle |
Rimbu, N. Czymzik, M. Ionita, M. Lohmann, G. Brauer, A. Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data |
author_facet |
Rimbu, N. Czymzik, M. Ionita, M. Lohmann, G. Brauer, A. |
author_sort |
Rimbu, N. |
title |
Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data |
title_short |
Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data |
title_full |
Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data |
title_fullStr |
Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data |
title_full_unstemmed |
Atmospheric circulation patterns associated with the variability of River Ammer floods: evidence from observed and proxy data |
title_sort |
atmospheric circulation patterns associated with the variability of river ammer floods: evidence from observed and proxy data |
publishDate |
2016 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890 https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890_3/component/file_1466893/1466890.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-12-377-2016 info:eu-repo/semantics/altIdentifier/urn/http://doi.crossref.org/servlet/query?format=unixref&pid=bib@gfz-potsdam.de&id=10.5194/cp-12-377-2016 https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890 https://gfzpublic.gfz-potsdam.de/pubman/item/item_1466890_3/component/file_1466893/1466890.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-12-377-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
2 |
container_start_page |
377 |
op_container_end_page |
385 |
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1766132215175970816 |