The compound event of heavy rainfall combined with snow-melt in southern Norway

Guest blog by Benjamin Poschlod Southern Norway is regularly exposed to floods triggered by heavy precipitation and snow-melt. A combination of high temperature leading to snow-melt and heavy rainfall is an example of a compound event, which leads to severe flooding when run-off due to snow-melt adds to river discharge from the rainfall. These compound … Continue reading The compound event of heavy rainfall combined with snow-melt in southern Norway

Investigating climate change impact on Rain-On-Snow events

Guest blog by Cenk Sezen Rain-on-snow events Rain-on-snow (ROS) floods, that is, the combined occurrence of snowmelt and rainfall events can cause huge economic impacts and endanger human lives due to a significant increase in the magnitude of runoff compared to only snowmelt or only rainfall events. Forecasting of ROS floods is difficult because of … Continue reading Investigating climate change impact on Rain-On-Snow events

Towards a categorisation of statistical methods to study compound events

Many extreme impacts on society are caused by compound events, which were recently defined as a combination of multiple drivers and/or hazards contributing to societal or environmental risk. Compound events include, for example, concurring precipitations and storm surges causing flooding along low-lying coastal areas; heatwaves enhanced by drought conditions; strong wind episodes combined with drought … Continue reading Towards a categorisation of statistical methods to study compound events

Session report: Understanding and modelling compound climate and weather events and their impacts

Chairperson: Bart van den Hurk Conveners: Nina Nadine Ridder | Co-conveners: Bart van den Hurk, Philip Ward, Seth Westra, Jakob Zscheischler, Samuel Jonson Sutanto, Claudia Vitolo, Henny A.J. Van Lanen This is a short summary of the oral session at the EGU 2019 where once again this year a session on understanding and modelling compound … Continue reading Session report: Understanding and modelling compound climate and weather events and their impacts

Medicanes: tropical-like-cyclones in the Mediterranean Sea and their uncertain fate with climate change

Guest blog by Davide Faranda, M. Carmen Alvarez Castro Mediterranean cyclones or "medicanes" Windstorms, extreme precipitations and instant floods seems to strike the Mediterranean area with increasing frequency. These events occur simultaneously (compound extreme events) during powerful tropical-like Mediterranean cyclones, also called medicanes. Medicanes are mesoscale cyclones with a diameter usually smaller than 300 km, … Continue reading Medicanes: tropical-like-cyclones in the Mediterranean Sea and their uncertain fate with climate change