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Journal Article
How Unusual Is the 2022 European Compound Drought and Heatwave Event?
2023
Overview
The 2022 Compound Drought and Heatwave (CDHW) caused widespread crop damage, water shortages, and wildfires across Europe. Our study analyzed this event’s severity and return period (RP) and compared it with past mega CDHWs in Europe. The hardest‐hit areas were Iberian Peninsula, France, and Italy, where temperatures exceeded 2.5°C above normal, and severe droughts persisted from May to August. Using a Bayesian approach, we estimated the RP for the 2022 CDHW event, which was unprecedented in Northern Italy, Iberian Peninsula, and western parts of France, with RPs of 354, 420, and 280 years, respectively. The reduced soil moisture due to precipitation deficits and high temperatures contributed to the persistence and severity of drought, creating a positive feedback loop where dry soils led to even drier conditions. In light of our findings, it is evident that global warming poses increased risks of severe CDHW events, which are likely to increase. Plain Language Summary We studied how severe was 2022 Compound Drought and Heatwave (CDHW) event over Europe, identified hotspots, and compared them with past mega‐events. The most impacted regions include the Iberian Peninsula, France, and Italy, experiencing higher‐than‐normal temperatures and severe drought conditions from May to August. Our study estimated the return period of this event, which indicates how often an event of this magnitude is expected to occur, and found that it was unprecedented in large parts of Northern Italy, Iberian Peninsula, and France. The hot and dry weather that continued from the Spring season caused the soil to lose moisture, worsening the drought. This, in turn, made the soil even drier, intensifying the drought and heatwaves further, aggravating the risks of wildfires across France and the Mediterranean region. Key Points Spatiotemporal patterns of 2022 compound drought and heatwave events were compared with past 2003, 2015, and 2018 extreme events Iberian Peninsula, France, and Italy experienced higher‐than‐normal temperatures and severe drought conditions from May to August 2022 compound event was unprecedented in most part of Europe, such as Iberian Peninsula, Italy, and western parts of France
Publisher
John Wiley & Sons, Inc,Wiley
Subject
