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The Doomsday Glacier, Part I: Thwaites and global ocean circulation.

The ice shelf that holds back the Thwaites "Doomsday Glacier" will disintegrate before New Years. We'll explain why this could mean a huge sea level emergency--and things far worse.

Morgaan Sinclair, Ph.D.'s avatar
Morgaan Sinclair, Ph.D.
Jun 07, 2026
∙ Paid
For a close-up look at this map, which show what happens to both our coasts with a 2’ rise in sea levels, go to https://www.climate.gov/maps-data/dataset/sea-level-rise-map-viewer and click on the little map. The complete loss of the Thwaites Glacier on the Western Antarctic Ice Shelf would result in a global sea level rise of 25”. Image: NOAA. Public domain.

PolitiSage first published on February 5th, 2023, and this is our first paid post. Oh, how we hate to have to do this, but, now almost 500 articles later, we need a little help. Please upgrade to a paid subscription if you can. If you can’t, start here, and come join us when you can. [New article continues below.]


New Research: Ocean Current Collapse More Likely, and Sooner, Than We Thought.

Morgaan Sinclair, Ph.D.
·
August 29, 2025
New Research: Ocean Current Collapse More Likely, and Sooner, Than We Thought.

For those of you who are Newbies for us, here is out white paper on how the ocean currents work and what has happened before when they shut down. It’s in the public domain, so feel free to pass it around, use it in the classroom (if you’re not arrested for it!), and to keep as a reference.

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When we wrote the article above most of a year ago, research showed the ocean circulation around Antarctica to be slowing. As it slows the “chimneys” — great circular gyres that spin the seas—show signs of shutting down. This, the AMOC, the Atlantic Meridional Overturning Circulation, is now coming under serious threat.

Schematic of global ocean circulation showing the AMOC component in the North Atlantic
This image is supplied by the EU’s EPOC science page at https://epoc-eu.org/what-is-the-amoc/ … Note the two loops around in the circular currents around Antarctica — and how they are driving the currents that drive the world ocean current. Image: EPOC/EU. Public domain.
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