Twenty years ago, the trend in annual mean global mean temperature became detectable. Ten years ago, robust regional seasonal mean temperature trends similarly started to emerge. Nowadays, we can see trends even in weather extremes.
WWA partner and deputy director of the University of Oxford’s Environmental Change Institute (ECI) Friederike Otto is the lead author of a new study published in Nature Climate Change.
With colleagues at the University of Reading, we performed a simple analysis to assess what factors played a role in this record heat, specifically the roles of greenhouse gas emissions associated with global warming, the natural climate oscillation known as El Niño, as well as solar activity and volcanic aerosols.