Inter-seasonal connection of typical European heatwave patterns to soil moisture

Abstract Although prolonged heat periods have become a recurring feature of European climate, little knowledge is available on dominant spatial patterns of heatwaves and their influence on moisture-related processes. Increased knowledge will help to improve heatwave and drought prediction and mitiga...

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Main Authors: Elizaveta Felsche, Andrea Böhnisch, Ralf Ludwig
Format: Article
Language:English
Published: Nature Portfolio 2023-01-01
Series:npj Climate and Atmospheric Science
Online Access:https://doi.org/10.1038/s41612-023-00330-5
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author Elizaveta Felsche
Andrea Böhnisch
Ralf Ludwig
author_facet Elizaveta Felsche
Andrea Böhnisch
Ralf Ludwig
author_sort Elizaveta Felsche
collection DOAJ
description Abstract Although prolonged heat periods have become a recurring feature of European climate, little knowledge is available on dominant spatial patterns of heatwaves and their influence on moisture-related processes. Increased knowledge will help to improve heatwave and drought prediction and mitigation. This study uses hierarchical agglomerative clustering to derive nine dominating spatial heatwave patterns from a 50-member regional climate model (Canadian Regional Climate Model version 5, CRCM5-LE). The heatwave patterns correspond well with clusters derived from an observational data set (E-OBS) and with extreme historical heatwave events. Moreover, we analyse the occurrence of heatwaves in the identified spatial patterns regarding a soil moisture deficit present before and after the event. We show that negative soil moisture anomalies in the preceding winter/spring (JFMA) can serve as a predictor for heatwaves in South Europe. For North Europe, we find a negative correlation between the number of heatwave days in summer and autumn (OND) soil moisture content.
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spelling doaj.art-13e91f7fb9fc4db99eef3dfcf47557622023-01-22T12:08:34ZengNature Portfolionpj Climate and Atmospheric Science2397-37222023-01-016111110.1038/s41612-023-00330-5Inter-seasonal connection of typical European heatwave patterns to soil moistureElizaveta Felsche0Andrea Böhnisch1Ralf Ludwig2Technical University of MunichDepartment of Geography, Ludwig-Maximilans-Universität MünchenDepartment of Geography, Ludwig-Maximilans-Universität MünchenAbstract Although prolonged heat periods have become a recurring feature of European climate, little knowledge is available on dominant spatial patterns of heatwaves and their influence on moisture-related processes. Increased knowledge will help to improve heatwave and drought prediction and mitigation. This study uses hierarchical agglomerative clustering to derive nine dominating spatial heatwave patterns from a 50-member regional climate model (Canadian Regional Climate Model version 5, CRCM5-LE). The heatwave patterns correspond well with clusters derived from an observational data set (E-OBS) and with extreme historical heatwave events. Moreover, we analyse the occurrence of heatwaves in the identified spatial patterns regarding a soil moisture deficit present before and after the event. We show that negative soil moisture anomalies in the preceding winter/spring (JFMA) can serve as a predictor for heatwaves in South Europe. For North Europe, we find a negative correlation between the number of heatwave days in summer and autumn (OND) soil moisture content.https://doi.org/10.1038/s41612-023-00330-5
spellingShingle Elizaveta Felsche
Andrea Böhnisch
Ralf Ludwig
Inter-seasonal connection of typical European heatwave patterns to soil moisture
npj Climate and Atmospheric Science
title Inter-seasonal connection of typical European heatwave patterns to soil moisture
title_full Inter-seasonal connection of typical European heatwave patterns to soil moisture
title_fullStr Inter-seasonal connection of typical European heatwave patterns to soil moisture
title_full_unstemmed Inter-seasonal connection of typical European heatwave patterns to soil moisture
title_short Inter-seasonal connection of typical European heatwave patterns to soil moisture
title_sort inter seasonal connection of typical european heatwave patterns to soil moisture
url https://doi.org/10.1038/s41612-023-00330-5
work_keys_str_mv AT elizavetafelsche interseasonalconnectionoftypicaleuropeanheatwavepatternstosoilmoisture
AT andreabohnisch interseasonalconnectionoftypicaleuropeanheatwavepatternstosoilmoisture
AT ralfludwig interseasonalconnectionoftypicaleuropeanheatwavepatternstosoilmoisture