Klimatema
Weather
Rain or shine the weather defines much of our experiences on the earth. From the freezing streets of Yakutsk in Siberia, the coldest city on earth, to the smoldering deserts of Death Valley, USA. The earths weather is created by a complex tapestry of natural forces, and no event happens alone in a vacuum. Everything from changes in ocean temperature in the Pacific, ice sheet expanse in the Arctic or the earths rotation impacts the weather. A sandstorm in Sahara can create heatwaves in the Atlantic ocean, and the Rocky Mountains can send powerful storms all the way to Bergen, Norway. Learn more about how weather forms, and the many natural processes involved.
Oppdatert 08. April 2025
Is the Weather Getting More Extreme?
Are extremes getting more extreme? Stephen Outten, researcher at Nansen Environmental and Remote Sensing Center and the Bjerknes Centre, looks at the evidence in temperature, rain and storms – and how a changing climate changes both probablities and expectations of what an extreme is.
Super El Ninos Linked to Drought in Europe
As the Pacific warming known as El Niño is normally associated with wet winters in western Europe, Martin King was surprised to find the opposite. El Niños are linked to European drought – if only they are extreme enough.
A Wild and Wet Future
Future weather in Norway is expected to see significant changes, with more rain and less snow becoming the norm.
Heatwaves - The Weather That Can Kill Thousands in Developed Countries
Heatwaves are the extreme weather events that kills the most worldwide together with its close cousin the long-term draught. Peer-reviewed analysis places the European death toll at more than 70,000, in the 2003 European heatwave alone [1]. This was in developed countries with the resources to mitigate the worst consequences. It lasted one month which makes this event as mortal as the ongoing pandemic.
The WHO defines heatwaves as more than three days with temperatures above 25 degrees C. This is when conditions start to get dangerous to humans. Other definitions are linked to higher temperatures than the normal temperatures – but what happens when the normal temperatures rise? Will there be less heatwaves?
Igor Ezau dicuss with Stephen outten and Ingjald Pilskog in this new episode “Heatwaves, the weather that can kill thousands in developed countries”.
North America's Greatest Export - Warm Weather to Europe
Is warm weather to Europe, North America's greatest export?
Listen to the science conversation between Tim Woollings, Associate Professor at the University of Oxford, and Stephen Outten and Ingjald Pilskog podcast hosts and researchers at the Bjerknes Centre.
Dr. Tim Woollings, has been visiting researcher at the Bjerknes Centre for Climate Research the last months. He is an expert in jet streams and large scale atmospheric dynamics.
The scientists discuss how the jet stream causes heat waves and cold periods, how the jet stream is affected by a changing climate and how the tropics and the Arctic pushes the jet northwards and southwards.
Fasten your seatbelts and join a trip with the jet stream around the globe, southwards along the Rocky Mountains and free and variable northeast bound across the North Atlantic.
Warning: This episode contains meteorological terms - be ware of terms like Rossby waves, eddy-driven jet, blocking and polar front!