Disastrous floods in the Balkans two years ago are likely linked to the temporary slowdown of giant airstreams,scientists found. These wind patterns, circling the globe in the form of enormous waves between the Equator and the North Pole, and normally hurry eastwards,but practically stopped for several days then—at the same time, a weather system got stuck over Bosnia and Herzegovina, and Serbia and Croatia that poured out record amounts of rain. The study adds evidence that so-called planetary wave resonance is a key mechanism for causing extreme weather events in summer. Further,the scientists showed that extreme rainfall events are strongly increasing in the Balkans, even more than the globally observed rise.
Source: phys.org