<
https://theconversation.com/summer-2023-was-northern-hemispheres-hottest-for-2-000-years-tree-rings-show-230021>
"The summer of 2023 was the warmest in the non-tropical areas of the northern
hemisphere for 2,000 years, a new study has shown.
Across this vast area of land, encompassing Europe, Asia and North America,
surface air temperatures were more than 2°C higher in June, July and August
2023 than the average summer temperature between AD1 and 1890, as reconstructed
from tree ring records.
While climate change is a global phenomenon, warming on a regional scale is
often stronger. And it is regional climate change, not the global average
temperature, that people experience.
The Paris agreement aims to limit climate change to below 2°C and ideally 1.5°C
of warming, but these figures refer to global temperature change, usually
averaged over 20 years. The authors of the new research argue that these
targets have already been breached at a regional scale in the northern
hemisphere summer.
There were 2,295 deaths associated with five heatwaves in summer 2023 in the
UK. The authors of the new study wanted to understand how unusually warm the
summer of 2023 was in the northern hemisphere compared with the past.
To do that, they turned to one of the most useful tools for taking Earth’s
temperature over thousands of years: rings that grow annually in tree trunks
anywhere on the planet where the climate is seasonal."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
