Article (Scientific journals)
Increased intensity and frequency of extreme precipitation events in Belgium as simulated by the regional climate model MAR
Brajkovic, Josip; Fettweis, Xavier; Noël, Brice et al.
2025In Journal of Hydrology: Regional Studies, 59, p. 102399
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Abstract :
[en] Study region: Belgium Study focus: In July 2021, Western Germany, the Netherlands and Belgium were hit by extreme rainfall events of unprecedented intensity, raising concerns about future trends. To assess future trends in extreme precipitation frequency and intensity, we use the regional climate model MAR at 5-km spatial resolution to conduct climate projections until 2100. MAR is forced by a set of six CMIP6 Earth System model (ESMs) with 4 IPCC scenarios ranging from low to high-end warming. Study insights: First, an Extreme Value Analysis (EVA) is performed on bias-adjusted daily model outputs over 30-year moving windows. We find that, on average, extreme precipitation intensity rises following the Clausius-Clapeyron scaling, i.e., a 7% increase per additional degree of global warming. This trend results from a clear increase in the spread and in the modes of the extreme precipitation event distributions. Second, an EVA is performed over the complete simulated period (2015-2100). Our analyses reveal that, even under low-warming scenarios, return level maps, i.e., representing the precipitation values associated with a certain return period, are more intense than those obtained using observational data over 1951-2021. For the 21st century, the 20-year daily return level can locally reach 100 mm per day, which represents a 25%–30% increase relative to the present day.
Research Center/Unit :
SPHERES - ULiège
Disciplines :
Earth sciences & physical geography
Author, co-author :
Brajkovic, Josip  ;  Université de Liège - ULiège > Sphères
Fettweis, Xavier  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Noël, Brice  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Vyver, Hans Van De
Ghilain, Nicolas  ;  Université de Liège - ULiège > Sphères
Archambeau, Pierre  ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Pirotton, Michel ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Doutreloup, Sébastien  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Language :
English
Title :
Increased intensity and frequency of extreme precipitation events in Belgium as simulated by the regional climate model MAR
Publication date :
June 2025
Journal title :
Journal of Hydrology: Regional Studies
eISSN :
2214-5818
Publisher :
Elsevier BV
Volume :
59
Pages :
102399
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
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