WMO HAD NO DATA FROM THE SIX MAJOR DATA SETS UNTIL IN 2004
The World Meteorological Organization (WMO) does not directly measure global temperatures but utilises data from six to eight major independent datasets. The WMO who ensures its analysis is authoritative, objective, backed up by the so called multiple lines of evidence, were not able to publish global temperatures before 2004, let alone the 1850-1900 baseline temperature of 13.76 C which cannot be verified. The AI confirm the assessment that robust, comprehensive temperature data for the Southern Hemisphere was limited until the 1970s is accurate. While surface temperature records existed prior to this time, they were sparse and predominantly focused on land areas yet it has become the most recent baseline temperature reference currently being used.
The six primary datasets commonly used by the WMO
- ERA5: Reanalysis dataset produced by the European Centre for Medium-Range Weather Forecasts (ECMWF) Copernicus Climate Change Service.
- JRA-3Q (or JRA-55): Reanalysis dataset from the Japan Meteorological Agency (JMA).
- GISTEMP v4: NASA’s Goddard Institute for Space Studies dataset.
- NOAAGlobalTemp v6: US National Oceanic and Atmospheric Administration dataset.
- HadCRUT5: A combined dataset from the UK’s Met Office Hadley Centre and the University of East Anglia’s Climatic ResearchUnit,.Berkeley Earth: An independent analysis group based in the USA.
- Here are the key points regarding Southern Hemisphere data:
- The 1970s Shift: The 1970s are recognized as a pivotal period when satellite observations and wider ocean buoy networks began providing consistent data, significantly improving on early, scattered island weather logs.
- Surface Data Gaps: Roughly 81% of the Southern Hemisphere is ocean, leading to significant gaps in data coverage, especially compared to the Northern Hemisphere...
Intergovernmental Panel on Climate Change (IPCC) +6. While earlier records exist, they require significant adjustment and are less comprehensive, making the data post-1970 considered much more robust for mapping the entire Southern Hemisphere.
3 Comments
The global average surface temperature was 1.44 °C (with a margin of uncertainty of ± 0.13 °C) above the 1850-1900 average, according to WMO’s consolidated analysis of eight datasets. Two of these datasets ranked 2025 as the second warmest year in the 176-year record, and the other six ranked it as the third warmest year. This can’t be disputed because thera are no reliable records available for that era!
There is no way of verifying this statement which is why these crooks are using it. The UN is supposed to be a peace keeping force but are nothing more than a bunch of gangsters trying to infuence our chidren just like what they did in Europe in the 1930/40’s.
AI Overview
Yes, evidence suggests that temperature estimates for the Southern Hemisphere around 1850 are based on a very limited number of stations, with estimates commonly citing approximately
100 stations for the entire hemisphere before 1900.
lindenashcroft.com
Here are the key details regarding this historical data limitation:
• Extremely Sparse Coverage: Historical climate analyses, such as those from the University of East Anglia’s Climate Research Unit, rely on only about 100 locations to represent the entire southern half of the earth during this period.
• Data Scarcity Before 1900: The number of weather stations remained very low in the Southern Hemisphere throughout the 19th century. For example, it has been noted that between 1900 and 1920, there were only 17 stations (excluding Australia) for the entire Southern Hemisphere.
• Impact on Records: These limited records are often pieced together from coastal stations, colonial settlements (such as Perth in the 1830s), and ship logbooks.
• Data Rescue Efforts: Due to this sparsity, modern researchers often work on “data rescue” projects to digitize early handwritten journals from missionaries, farmers, and explorers to improve the historical record.
lindenashcroft.com +4