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PGTS Humble Blog Thread: Global Warming/Bio-Security

Gerry Patterson. The world's most humble blogger

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December 2024 Climate Update

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Date: Tue, 31 Dec 2024 23:00:00 +1100 In December 2024, global climate indicators confirmed that 2024 concluded as the hottest year in recorded history, pushing key metrics to unprecedented highs

The following is a summary for December 2024

Global Temperature

1. December 2024: Ranked as the second-warmest December on record globally (behind December 2023), sitting approximately 1.55^oC to 1.69^oC above pre-industrial levels depending on the specific baseline dataset used.
   
   
2. Full Year 2024 Context: Officially sealed 2024 as the first calendar year to average more than 1.5^oC above the pre-industrial average (1850-1900), coming in at roughly 1.55^oC to 1.60^oC above that baseline.
   
   

Carbon Dioxide (CO₂) Levels

1. Atmospheric Concentration: Global CO₂ concentrations averaged approximately 422.5 ppm (parts per million) for the year 2024, representing roughly 50% above pre-industrial levels.
   
   
2. Growth Rate: The annual increase of atmospheric CO₂ surged by a record-shattering ~3.3 to 3.5 ppm in a single year, marking one of the largest annual leaps ever measured at baseline tracking facilities like the Mauna Loa Observatory.
   
   

Sea Level Rise

1. Annual Increase: Global mean sea levels rose by an accelerated ~0.59 cm (5.9 mm) during 2024 alone, boosted significantly by extreme thermal expansion from record ocean heat content.
   
   
2. Long-Term Trend: Total cumulative global sea level reached a record high of about 10.5 cm above the start of the satellite altimetry record in 1993, with the decadal rate of rise more than doubling compared to the 1990s.
   
   

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