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...
Published in: | Climate of the Past |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus GmbH
2016
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Online Access: | https://lup.lub.lu.se/record/3cb333d6-75d2-4058-8d70-9765ddf2a0d8 https://doi.org/10.5194/cp-12-377-2016 |
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ftulundlup:oai:lup.lub.lu.se:3cb333d6-75d2-4058-8d70-9765ddf2a0d8 2024-02-11T10:06:28+01:00 Atmospheric circulation patterns associated with the variability of River Ammer floods : Evidence from observed and proxy data Rimbu, Norel Czymzik, Markus Ionita, Monica Lohmann, Gerrit Brauer, Achim 2016-02-23 https://lup.lub.lu.se/record/3cb333d6-75d2-4058-8d70-9765ddf2a0d8 https://doi.org/10.5194/cp-12-377-2016 eng eng Copernicus GmbH https://lup.lub.lu.se/record/3cb333d6-75d2-4058-8d70-9765ddf2a0d8 http://dx.doi.org/10.5194/cp-12-377-2016 scopus:84975744375 wos:000371625400011 Climate of the Past; 12(2), pp 377-385 (2016) ISSN: 1814-9324 Oceanography Hydrology Water Resources Meteorology and Atmospheric Sciences contributiontojournal/article info:eu-repo/semantics/article text 2016 ftulundlup https://doi.org/10.5194/cp-12-377-2016 2024-01-17T23:29:31Z 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 Lund University Publications (LUP) Climate of the Past 12 2 377 385 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Oceanography Hydrology Water Resources Meteorology and Atmospheric Sciences |
spellingShingle |
Oceanography Hydrology Water Resources Meteorology and Atmospheric Sciences Rimbu, Norel Czymzik, Markus Ionita, Monica Lohmann, Gerrit Brauer, Achim Atmospheric circulation patterns associated with the variability of River Ammer floods : Evidence from observed and proxy data |
topic_facet |
Oceanography Hydrology Water Resources Meteorology and Atmospheric Sciences |
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, Norel Czymzik, Markus Ionita, Monica Lohmann, Gerrit Brauer, Achim |
author_facet |
Rimbu, Norel Czymzik, Markus Ionita, Monica Lohmann, Gerrit Brauer, Achim |
author_sort |
Rimbu, Norel |
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 |
publisher |
Copernicus GmbH |
publishDate |
2016 |
url |
https://lup.lub.lu.se/record/3cb333d6-75d2-4058-8d70-9765ddf2a0d8 https://doi.org/10.5194/cp-12-377-2016 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past; 12(2), pp 377-385 (2016) ISSN: 1814-9324 |
op_relation |
https://lup.lub.lu.se/record/3cb333d6-75d2-4058-8d70-9765ddf2a0d8 http://dx.doi.org/10.5194/cp-12-377-2016 scopus:84975744375 wos:000371625400011 |
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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1790604217020317696 |