The 2018 northern European hydrological drought and its drivers in a historical perspective
In 2018, large parts of northern Europe were affected by an extreme drought. A better understanding of the characteristics and the large-scale atmospheric circulation driving such events is of high importance to enhance drought forecasting and mitigation. This paper examines the historical extremene...
Published in: | Hydrology and Earth System Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/hess-24-5621-2020 https://noa.gwlb.de/receive/cop_mods_00054776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054427/hess-24-5621-2020.pdf https://hess.copernicus.org/articles/24/5621/2020/hess-24-5621-2020.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00054776 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00054776 2023-05-15T16:12:17+02:00 The 2018 northern European hydrological drought and its drivers in a historical perspective Bakke, Sigrid J. Ionita, Monica Tallaksen, Lena M. 2020-11 electronic https://doi.org/10.5194/hess-24-5621-2020 https://noa.gwlb.de/receive/cop_mods_00054776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054427/hess-24-5621-2020.pdf https://hess.copernicus.org/articles/24/5621/2020/hess-24-5621-2020.pdf eng eng Copernicus Publications Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-24-5621-2020 https://noa.gwlb.de/receive/cop_mods_00054776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054427/hess-24-5621-2020.pdf https://hess.copernicus.org/articles/24/5621/2020/hess-24-5621-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/hess-24-5621-2020 2022-02-08T22:34:51Z In 2018, large parts of northern Europe were affected by an extreme drought. A better understanding of the characteristics and the large-scale atmospheric circulation driving such events is of high importance to enhance drought forecasting and mitigation. This paper examines the historical extremeness of the May–August 2018 meteorological situation and the accompanying meteorological and hydrological (streamflow and groundwater) drought. Further, it investigates the relation between the large-scale atmospheric circulation and summer streamflow in the Nordic region. In May and July 2018, record-breaking temperatures were observed in large parts of northern Europe associated with blocking systems centred over Fennoscandia and sea surface temperature anomalies of more than 3 ∘C in the Baltic Sea. Extreme meteorological drought, as indicated by the 3-month Standardized Precipitation Index (SPI3) and Standardized Precipitation Evapotranspiration Index (SPEI3), was observed in May and covered large parts of northern Europe by July. Streamflow drought in the Nordic region started to develop in June, and in July 68 % of the stations had record-low or near-record-low streamflow. Extreme streamflow conditions persisted in the southeastern part of the region throughout 2018. Many groundwater wells had record-low or near-record-low levels in July and August. However, extremeness in groundwater levels and (to a lesser degree) streamflow showed a diverse spatial pattern. This points to the role of local terrestrial processes in controlling the hydrological response to meteorological conditions. Composite analysis of low summer streamflow and 500 mbar geopotential height anomalies revealed two distinct patterns of summer streamflow variability: one in western and northern Norway and one in the rest of the region. Low summer streamflow in western and northern Norway was related to high-pressure systems centred over the Norwegian Sea. In the rest of the Nordic region, low summer streamflow was associated with a high-pressure system over the North Sea and a low-pressure system over Greenland and Russia, resembling the pattern of 2018. This study provides new insight into hydrometeorological aspects of the 2018 northern European drought and identifies large-scale atmospheric circulation patterns associated with summer streamflow drought in the Nordic region. Article in Journal/Newspaper Fennoscandia Greenland Northern Norway Norwegian Sea Niedersächsisches Online-Archiv NOA Greenland Norway Norwegian Sea Hydrology and Earth System Sciences 24 11 5621 5653 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Bakke, Sigrid J. Ionita, Monica Tallaksen, Lena M. The 2018 northern European hydrological drought and its drivers in a historical perspective |
topic_facet |
article Verlagsveröffentlichung |
description |
In 2018, large parts of northern Europe were affected by an extreme drought. A better understanding of the characteristics and the large-scale atmospheric circulation driving such events is of high importance to enhance drought forecasting and mitigation. This paper examines the historical extremeness of the May–August 2018 meteorological situation and the accompanying meteorological and hydrological (streamflow and groundwater) drought. Further, it investigates the relation between the large-scale atmospheric circulation and summer streamflow in the Nordic region. In May and July 2018, record-breaking temperatures were observed in large parts of northern Europe associated with blocking systems centred over Fennoscandia and sea surface temperature anomalies of more than 3 ∘C in the Baltic Sea. Extreme meteorological drought, as indicated by the 3-month Standardized Precipitation Index (SPI3) and Standardized Precipitation Evapotranspiration Index (SPEI3), was observed in May and covered large parts of northern Europe by July. Streamflow drought in the Nordic region started to develop in June, and in July 68 % of the stations had record-low or near-record-low streamflow. Extreme streamflow conditions persisted in the southeastern part of the region throughout 2018. Many groundwater wells had record-low or near-record-low levels in July and August. However, extremeness in groundwater levels and (to a lesser degree) streamflow showed a diverse spatial pattern. This points to the role of local terrestrial processes in controlling the hydrological response to meteorological conditions. Composite analysis of low summer streamflow and 500 mbar geopotential height anomalies revealed two distinct patterns of summer streamflow variability: one in western and northern Norway and one in the rest of the region. Low summer streamflow in western and northern Norway was related to high-pressure systems centred over the Norwegian Sea. In the rest of the Nordic region, low summer streamflow was associated with a high-pressure system over the North Sea and a low-pressure system over Greenland and Russia, resembling the pattern of 2018. This study provides new insight into hydrometeorological aspects of the 2018 northern European drought and identifies large-scale atmospheric circulation patterns associated with summer streamflow drought in the Nordic region. |
format |
Article in Journal/Newspaper |
author |
Bakke, Sigrid J. Ionita, Monica Tallaksen, Lena M. |
author_facet |
Bakke, Sigrid J. Ionita, Monica Tallaksen, Lena M. |
author_sort |
Bakke, Sigrid J. |
title |
The 2018 northern European hydrological drought and its drivers in a historical perspective |
title_short |
The 2018 northern European hydrological drought and its drivers in a historical perspective |
title_full |
The 2018 northern European hydrological drought and its drivers in a historical perspective |
title_fullStr |
The 2018 northern European hydrological drought and its drivers in a historical perspective |
title_full_unstemmed |
The 2018 northern European hydrological drought and its drivers in a historical perspective |
title_sort |
2018 northern european hydrological drought and its drivers in a historical perspective |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/hess-24-5621-2020 https://noa.gwlb.de/receive/cop_mods_00054776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054427/hess-24-5621-2020.pdf https://hess.copernicus.org/articles/24/5621/2020/hess-24-5621-2020.pdf |
geographic |
Greenland Norway Norwegian Sea |
geographic_facet |
Greenland Norway Norwegian Sea |
genre |
Fennoscandia Greenland Northern Norway Norwegian Sea |
genre_facet |
Fennoscandia Greenland Northern Norway Norwegian Sea |
op_relation |
Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-24-5621-2020 https://noa.gwlb.de/receive/cop_mods_00054776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054427/hess-24-5621-2020.pdf https://hess.copernicus.org/articles/24/5621/2020/hess-24-5621-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/hess-24-5621-2020 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
24 |
container_issue |
11 |
container_start_page |
5621 |
op_container_end_page |
5653 |
_version_ |
1765997543449165824 |