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The article investigates how extreme the 2021 western North America heat wave was in the global context. Topics discussed include increasing magnitude of extreme temperature events, climatology of both the time period and region where the extreme temperature occurred, and use of Earth system models to estimate how the frequency of heat extremes will change as atmospheric greenhouse gases rise into the future.

Direct, cascading, and compounding risks and consequences from current climate change will present novel challenges for the Southern Ocean ecosystem (Constable et al., 2022). The Southern Ocean is experiencing unprecedented environmental risks and consequences from current climate change. [Extracted from the article]

The most notable weather-related events include tropical cyclones, extreme temperatures and floods. Welcome to a Special Issue of I Weather i dedicated to climate science in advance of the 2021 United Nations Climate Change Conference - COP26 - which will be held in Glasgow from 31 October to 12 November. COP26 takes place as the fingerprint of anthropogenic climate change is increasingly evident on the weather around the world, with the extreme heatwaves and flooding seen across the Northern Hemisphere during the last few months serving as recent examples. [Extracted from the article]