First 2026 issue @pnas.org features @khorikawa.bsky.social et al.'s work on deep marine sediment from #AmundsenSea. #Pliocene muds contain material from bedrock sources as far inland as #EllsworthWhitmore Mountains: a sign of major #WAIS retreat & #glacial- #deglacial switching ow.ly/wHeq50XTv2n

Model simulation of the #MPWP glacial-deglacial switching (more than 5 deep retreats to #EllsworthMountains province) is breathtaking in this animation by ARHalberstadt : youtu.be/uu2vlzrP2vk

The #ThwaitesGlacier region has a prior history of dramatic #glacial-deglacial switching in the #Pliocene www.pnas.org/doi/10.1073/...

Evidence of rapid glacial-deglacial switching, from a high resolution record from #Pliocene marine sediments, foretells #WestAntarctica 's future theconversation.com/west-antarct...

Increased seismicity and magmatism in #WestAntarctica - two of the consequences of #glacial-deglacial switching in the #Pliocene and in the near future #AmundsenSea theconversation.com/west-antarct...

I guess that is a key question ... is sed delivery to the slope primarily during glacial max (when grounding zone near/at shelf edge) or during early deglacial/retreat when meltwater is doing a lot of sed transport work ... and, as always, maybe both and it depends

VGSP Hunter Allen from Northern Arizona University is working on cores from lakes across Alaska as part of a large project studying glacial-fed lakes. Hunter uses these sediment cores that span the deglacial to the Holocene, trying to identify how changes in past climate impacted glaciers.

The Hawaiian Drowned Reefs expedition was one of the coolest things #IODP did before the program ended. Now all the site reports and core descriptions are online.
(And I just need to get around to reading them) 🧪⚒️🌊

... still sad I didn't get to join it.

link: publications.iodp.org/proceedings/...

At the end of St nami’s of Atmosphere and Oceans, I am tacking on a short course on Earth’s Climate: Past, Present and Future. Following Bill Ruddiman’s book closely. From Tectonic and Orbital timescales to millennial and modern timescales. Glacial/deglacial processes.

youtube.com/playlist?lis...

Terra entrará em nova Era do Gelo em cerca de 10 mil anos
Créditos da imagem: Stephen Barker et al.
www.inovacaotecnologica.com.br/noticias/not... via @inovacaotecnologica.com.br

Here’s a short course on Earth’s Climate: Past, present and future based on Bill Ruddiman’s nice book. The full course is there as well. We look at timescales from tectonic to million years to glacial/deglacial, historic, modern climate & future climate change. #climate

youtube.com/playlist?lis...

For a few years, I studied what climate information was locked within glacial to deglacial wood deposits from the Midwest. The North American megafauna collapsed across that same period.

So, here is my favorite sign in Michigan's UP; the name is after mammoth bones found in an early mine shaft.

We use the CESM1.2 model (which realistically simulates observed extreme El Niño events) & force it under background climate conditions of the Last Glacial Maximum ~21000 years ago and the subsequent deglacial transition into the Holocene. See below; some takeaways of this figure: