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to human influence. What was an event with a return period of 100 years in the 20 th century should now be expected to occur, on average, once every 70 years or less. This trend is expected to continue over the 21st century. Van der Wiel et al 2017 2013 Summer heatwave, China Summer 2013

points for 2022 was the dry conditions. Aside from brief spells at the beginning of January and at the end of February, the UK’s total rainfall accumulation has remained persistently below average for the year.  Summer was the tenth driest on record for the UK, with the south and east of the country

Exceptional warmth, September 2016 A brief heatwave from 12 to 15 September brought exceptionally high temperatures to southeast England, accompanied by some torrential downpours causing flash flooding. On 13 September, Gravesend (Kent) recorded 34.4 °C, the UK's highest temperature of the year

the ongoing rise in global temperatures. To halt the CO2 rise and prevent further warming, CO2 emissions would initially need to halve, and reduce by even more in the long term. A more in-depth feature on this topic is being hosted by Carbon Brief. More by Press Office What is the Azores High? Met Office week

incursions of warm air occurring only briefly. Figure 4. Arctic sea ice melt rate through the melting season illustrated with a 3-week running-mean sea ice extent change for 2022 (black), compared to 2021 (red), 2020 (pink), the record low year of 2012 (blue), and the 1981-2010 average (black dashed

cooler than average, with some snow falling early on. But this cool weather was soon replaced with milder conditions for much of the rest of the month, with only brief cooler interludes at times.    Overall, the provisional mean temperature for the UK was 6.7°C, 1.0°C above average. Southern England

said: “I would say that 2022 was the busiest year in terms of extreme weather events, with member states reporting around 500 extreme weather and climate events worldwide.” The duration of these events varies from the brief ferocity of tropical cyclone Ian which wrought havoc on the southern United

once again, with temperatures back to near average and frequent showery rain. The provisional UK mean temperature was 16.6 °C, which is 1.5 °C above the 1981-2010 longterm average. It was provisionally the equal fifth warmest July for the UK in a series from 1884. Mean maximum temperatures were up

December 418.6   Passing a symbolic threshold: 50% above pre-industrial Despite the smaller rise expected in 2022, CO2 concentrations are still increasing and will once again reach the highest values on record. For most of this year, atmospheric CO2 will be at levels more than 50% higher than when

change? Arctic soils contain large amounts of inert carbon, buried up to thousands of years ago, and locked up in frozen permafrost. Once permafrost soil has warmed enough to thaw, decomposition of soil carbon increases significantly. This releases carbon in the form of carbon dioxide and methane – both