HomeClimate Change News2023 SkS Weekly Climate Change & Global Warming News Roundup #3

2023 SkS Weekly Climate Change & Global Warming News Roundup #3






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2023 SkS Weekly Climate Change & Global Warming News Roundup #3

Posted on 21 January 2023 by John Hartz

Story of the Week

State of the climate: How the world warmed in 2022

With a new year underway, most of the climate data for the whole of 2022 is now available. And this data shows that last year set new records for individual locations as well as the world as a whole. 

Here, Carbon Brief examines the latest data across the oceans, atmosphere, cryosphere and surface temperature of the planet (see the links below to navigate between sections). This 2022 review reveals:

  • Ocean heat content: It was the warmest year on record for ocean heat content, which increased notably between 2021 and 2022.
  • Surface temperature: It was between the fifth and sixth warmest year on record for surface temperature for the world as a whole, at between 1.1C and 1.3C above pre-industrial levels across different temperature datasets. The last eight years have been the eight warmest years since records began in the mid-1800s.
  • A persistent triple-dip La Niña: The year ended up cooler than it would otherwise be due to persistent La Niña conditions in the tropical Pacific. Carbon Brief finds that 2022 would have been the second warmest year on record after 2020 in the absence of short-term variability from El Niño and La Niña events. 
  • Warming over land: It was the warmest year on record in 28 countries – including China, France, Germany, Ireland, Italy, New Zealand, Portugal, Spain and the Uk – and in areas where 850 million people live.
  • Extreme weather: 2022 saw extreme heatwaves over Europe, China, India, Pakistan and South America, as well as catastrophic flooding in Pakistan, Brazil, West Africa and South Africa. Climate change played a clear role in increasing the severity of all of these events.
  • Comparison with climate model data: Observations for 2022 are close to the central estimate of climate models featured in the IPCC fifth assessment report.
  • Warming of the atmosphere: It was the seventh or eighth warmest year in the lower troposphere – the lowest part of the atmosphere – depending on which dataset is used. The stratosphere – in the upper atmosphere – is cooling, due in part to heat trapped in the lower atmosphere by greenhouse gases.
  • Sea level rise: Sea levels reached new record-highs, with notable acceleration over the past three decades.
  • Greenhouse gases: Concentrations reached record levels for CO2, methane and nitrous oxide.
  • Sea ice extent: Arctic sea ice saw its 10th lowest minimum extent on record, and was generally at the low end of the historical range for the year. Antarctic sea ice saw a new record low extent for much of 2022.
  • Looking ahead to 2022: Carbon Brief predicts that global average surface temperatures in 2023 are most likely to be slightly warmer than 2022, but are unlikely to set a new all-time record given lingering La Niña conditions in the first half of the year.

Click here to access the entire article as originally posted on the Carbon Brief website.

State of the climate: How the world warmed in 2022 by Zeke Hausfather, Climate Brief, Jan 18, 2023

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