Atmospheric Rivers from a Compound Event Perspective

Guest blog by Alexandre Ramos, Instituto Dom Luiz, Portugal An Atmospheric River (AR) is a long, narrow, and transient corridor of strong horizontal water vapour transport that is typically associated with a low-level jet stream ahead of the cold front of an extratropical cyclone. The water vapour in ARs is supplied by tropical and/or extratropical moisture … Continue reading Atmospheric Rivers from a Compound Event Perspective

Meteorological and agricultural hazards in high drought risk scenarios

Guest blog by Edoardo Vignotto, University of Geneva, Switzerland Statistical modelling of extreme climatological events has recently gained a lot of interest. These events may occur in many different situations, often with dramatic consequences. Some examples are flooding, heat waves, extreme wind speeds, spatially concurring rainfall and long drought periods. In all these cases, it … Continue reading Meteorological and agricultural hazards in high drought risk scenarios

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

When rivers flood, surrounding rivers often flood at the same time.

Guest Blog by Wouter Berghuijs (orcid) Frequent readers of this blog may be aware that different natural hazards often happen at the same time; periods of drought may coincide with periods of extreme heat, and very strong winds can come with extreme precipitation. However, it is probably even more common that one type of hazard … Continue reading When rivers flood, surrounding rivers often flood at the same time.