The influence of diabatic heating on the North-Atlantic extratropical cyclone cluster Dudley, Eunice and Franklin in February 2022 ...

• Main Authors: Batelaan-Bruggeman, Thomas, Weijenborg, Chris, Steeneveld, Gert-Jan
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: North Atlantic
• Online Access: https://dx.doi.org/10.57757/iugg23-1840; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017731

<!--!introduction!--> In February 2022, a cluster of severe extratropical cyclones hit North-Western Europe within one week and caused widespread damage by wind gusts and accumulated precipitation. In that week, extratropical cyclones Dudley, Eunice and Franklin developed over the North-Atlantic within a baroclinic environment with strong jet streams accompanied with atmospheric rivers. We hypothesise that diabatic heating through latent heat release within the extratropical cyclones created a baroclinic environment favourable for secondary cyclogenesis. We presume that latent heating on the trailing cold-front of the primary cyclone was essential for the secondary cyclogenesis. To identify the influence of latent heat release on the cyclogenesis of these storms, we performed idealised simulations with the Open Integrated Forecast System (OpenIFS). Latent heat of vaporisation was doubled, switched off and reduced with a factor of hundred. The control run captured the individual cyclones, their ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...