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International Journal of Science and Philosophy



  1. Observed average global air temperature change last 40 years is about +0.17oC per decade. If this change rate remains stable, additional average global air temperature increase by year 2100 will be about +1.3oC. However, part of the apparent temperature increase reported is due to administrative changes, and the real future increase may therefore be smaller.
  2. Tide gauges along coasts indicate a typical global sea level increase of about 1-2 mm/yr. Coastal sea level change rate last 100 year has essentially been stable, without recent acceleration. If change rate remains stable, global sea level at coasts will typically increase 8-16 cm by year 2100, although many locations in regions affected by glaciation 20,000 ago, will experience a relative sea level drop.
  3. Since 2004 the global oceans above 1900 m depth on average have warmed about 0.07oC. The maximum warming (about 0.2oC, 0-100 m depth) mainly affects oceans near Equator, where the incoming solar radiation is at maximum.
  4. Changes in atmospheric CO2 follow changes in global air temperature. Changes in global air temperature follow changes in ocean surface temperature.
  5. There is no perceptible effect on atmospheric CO2 due to the COVID-related drop in GHG emissions 2020-2021. Natural sinks and sources for atmospheric CO2 far outweigh human contributions.  

Please find below a link that will take you to a monthly newsletter (pdf; ca. 7 MB) with global meteorological information updated to September 2022:

If this does not work, please copy the above link directly into your browser. Alternatively, you can use the September 2022 ‘update’ link on

All temperatures in this newsletter are shown in degrees Celsius.

All previous monthly issues of this newsletter (since March 2009), diagrams and additional material are available for download on  Here you will also find links to the original data used to prepare the various diagrams.

I apologize for any double mailing. If you do not wish to receive further mails of this type, please mail me to that effect.

Best wishes, yours sincerely,
Ole Humlum

Arctic Historical Evaluation and Research Organisation
Longyearbyen, Svalbard, Norway.

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