Som vi tidigare har sett här, klarlägger forskarna kopplingen mellan klimatförändringarna och extrema väder. Här är mer om det, med exempel från värmeböljan i Tasmanien förra vintern (sommaren där).
Havets yttemperatur höjdes med 2,5 grad mot vad som var normalt under en lång tid. Bara den globala uppvärmningen kunde skapa en sån kraftig ökning, slår man fast.
Climate change brings extreme weather
14 Jan 2019
In the past, scientists were reluctant to attribute particular extreme weather events to climate change. But for the second consecutive year, they have done so with confidence.
Thanks to improved modeling, increased computer power, and better skill in interpreting data, attribution science – a young branch of climate science – has been blossoming, says Jeff Rosenfeld, editor-in-chief of the Bulletin of the American Meteorological Society (BAMS).
…
The researchers estimate that the Tasman Sea marine heatwave from November 2017 to April 2018 couldn’t have occurred without the input of anthropogenic climate change. The heatwave extended from west of Tasmania, off Australia’s southern coast, to east of New Zealand and included the entire Tasman Sea, an area of 2,000 by 2,800 km.
Although natural variability was important in initiating the heatwave, two global climate model (GCM) ensembles indicate that the record sea surface temperatures, up to 2.5 °C above the long-term norm, “were virtually impossible without anthropogenic influence”, the scientists report.
https://physicsworld.com/a/climate-change-brings-extreme-weather/