HiWAVES3

The weather impacts our society in many ways. In HiWAVES3 we study high impact weather events, i.e. the events that most severely impact society. For example, we identify these events by calculating river levels, wind and solar energy yields and crop yields using thousands of years of global daily weather generated by state-of-the-art climate models and selecting the most extreme cases. Climate model data are used because generally the observational record is relatively short, which limits the possibility of sampling and studying extreme events. We study the meteorological conditions leading to the extreme societal impacts, the effect of climate change and the predictability of these events. Stories of these events are created for communication purposes.

• HIWAVES3 has generated a novel dataset of climate data totalling 24.000 years of global daily weather using two global climate models (EC-Earth v2.3, HadGEM2-ES).It forms an excellent resource to study extreme high impact events in current and warmer climate conditions.

• HIWAVES3 identified meteorological events leading to extreme low wind and solar energy production and simultaneous high electricity demand in Europe.Furthermore, the impact of climate change on extreme low and high river levels globally was calculated.

• HiWAVES3 illustrates how high impact events might arisefrom meteorological conditions that are not considered extreme.