Re: Scientists Just Confirmed What’s Driving Sea Level Rise And It’s Alarming

[John Nissen]

Hi Renaud,

This is good confirmation of current trends for SLR.  The rate (they call it acceleration) in SLR grew from 1mm per year in 1980 to 4mm per year in 2025, while we know that global warming rose 1.0C.  The current rate of global warming is 0.4C per decade: on a favourable linear extrapolation, it would add 3.0C to the 1.5C in 2025 to give 4.5C by 2100.  Assuming SLR is linear with temperature (i.e. no tipping phenomena) then the average rate of sea level rise over the next 75 years will be 8 mm per year.  This gives us 60 cm of SLR between now and 2100.

This doesn't look too bad until one realises that the Arctic is in a severely accelerated meltdown, with the danger of committing over 7m SLR from the Greenland Ice Sheet alone.  My calculations suggest that only prompt SAI deployment has any hope of halting the meltdown.

Cheers, John

On Wed, May 27, 2026 at 5:07 PM Renaud de RICHTER <renaud.d...@gmail.com> wrote:

https://scitechdaily.com/scientists-just-confirmed-whats-driving-sea-level-rise-and-its-alarming/ 

[Veli Albert Kallio]

Divergence here needs to be remembered as extrapolating cannot be extended indefinitely. Each 1.0C weakens ice some 15 fold, if remember correctly. Therefore, the holding of GIS on substrates weakens considerably; this is essential on tilted land masses. Will follow Hudson Bay collapse at some point Arctic Ocean has become ice free and melt water and flash flood accumulation reaches a new tipping point. Also the more potholes fill with water, the less holding area remains to anchor the ice sheet on elevated grounds. It all turns into rotten, honeycombed ice. The perimeter mountains also begin to collapse as permafrost frozen water seams melt, leading to collapses, tsunamis, and diminishing ice containment barriers around Greenland (and Antarctica).

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From: John Nissen <johnnis...@gmail.com>
Sent: 30 May 2026 14:46
To: Renaud de RICHTER <renaud.d...@gmail.com>
Cc: Planetary Restoration <planetary-...@googlegroups.com>; Sir David King <d...@camkas.co.uk>; Peter Wadhams <peter....@gmail.com>; Albert Kallio <albert...@hotmail.com>; Anni Pokela <an...@operaatioarktis.fi>
Subject: Re: Scientists Just Confirmed What’s Driving Sea Level Rise And It’s Alarming