Re: [HPAC] Zoom review of my "What If Explorer" tentatively set for 11 AM EST Monday November 3rd

0 views
Skip to first unread message

John Nissen

unread,
Oct 26, 2025, 12:00:57 PM (12 days ago) Oct 26
to br...@chesdata.com, healthy-planet-...@googlegroups.com, Planetary Restoration
Hi Bruce,

The costs would go up dramatically after a collapse of any one of the five Arctic tipping elements*, each likely to be triggered (to the point of no return) by reaching 2C, if not before.  This is why it is so urgent to start applying cooling interventions to refreeze the Arctic, even before applying them to other parts of the planet.

Cheers, John

*Arctic tipping elements
Since 1980 the Arctic has been warming around four times faster than the global average.  Five elements of the Arctic have been categorised as tipping elements in the Earth System:
  • the Arctic sea ice; 
  • the Greenland Ice Sheet; 
  • the Arctic permafrost, both on land and under the seabed; 
  • the polar jet stream; 
  • the Atlantic Meridional Overturning Circulation (AMOC). 
See Steffen et al, 


On Sat, Oct 25, 2025 at 10:52 PM <br...@chesdata.com> wrote:

Zoom link: https://us02web.zoom.us/j/87649424239?pwd=Zi9XTTRMZXRpcGowRDFKanpSbXF6Zz09 

 

Let me know if you are interested in attending or if another date would be better.

 

Cheers!

 

Bruce Parker

--
You received this message because you are subscribed to the Google Groups "Healthy Planet Action Coalition (HPAC)" group.
To unsubscribe from this group and stop receiving emails from it, send an email to healthy-planet-action...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/healthy-planet-action-coalition/016f01dc45f9%24a3b6c630%24eb245290%24%40chesdata.com.
Reply all
Reply to author
Forward
0 new messages