Joey Schnaubelt

Extremely poleward shift of Antarctic Circumpolar Current by eccentricity during the Last Interglacial - Nature Communications The Antarctic Circumpolar Current (ACC) since the Last Interglacial is reconstructed, showing orbital-scale shifts in ACC position driven by eccentricity and precession, possibly counteracting the predicted southward shift due to global warming.

Extremely poleward shift of Antarctic Circumpolar Current by eccentricity during the Last Interglacial

www.nature.com/articles/s41...

Enhanced deep Southern Ocean stratification during the lukewarm interglacials - Nature Communications Lead (Pb) isotopes from a ferromanganese crust reveal that during lukewarm interglacials before the Mid-Brunhes Event, stronger deep Southern Ocean stratification limited CO2 release, helping keep atmospheric CO2 levels lower.

A new paleoclimate study links stronger ocean stratification to past ‘lukewarm’ interglacials, but points to lower ocean carbon sequestration in the future.
www.nature.com/articles/s41...

#climatechange #oceans #stratification #sequestration #paleoclimate #interglacial

Plots illustrating the bipolar convection seesaw mechanism

⚒️ Article: The onset of Southern Ocean convection following a slowing of the Atlantic meridional overturning circulation during Heinrich Events can help explain rapid CO2 increases and Antarctic warming during these events

@pik-potsdam.bsky.social‬

www.nature.com/articles/s41...

Antarctica surrounded by time-series comparing the temporal evolution of parameters of Greenland and Antarctica

⚒️ Comment: The Greenlandification of Antarctica

www.nature.com/articles/s41...

Persistent eastern equatorial Pacific Ocean upwelling since the warm Pliocene Upwelling generates a nutrient-rich “cold tongue” in the eastern equatorial Pacific Ocean (EEP), with impacts on global climate, oceanic biological productivity, and the carbon cycle. The cold tongue ...

Today, we published a study long in the making on how upper and subsurface tropical Pacific waters responded (and maybe will adjust) to warmer global climate. Here’s the story of how we got here after 15 years. many authors but shout out @jfarmersalmanac.bsky.social
🌊
www.science.org/doi/10.1126/...

Glaciers in California’s Sierra Nevada are likely disappearing for the first time in the Holocene The projected loss of glaciers in California’s Sierra Nevada is likely unprecedented in at least the past 30,000 years.

Very cool work (with a very sobering result) led by Andy Jones (a paleoCAMP alumnus!) in Science Advances: 'Glaciers in California’s Sierra Nevada are likely disappearing for the first time in the Holocene' www.science.org/doi/10.1126/...

Increased future ocean heat uptake constrained by Antarctic sea ice extent Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...

🚨🌊 New highlight paper out today in Earth System Dynamics!

We find an observational constraint implying more future global ocean heat uptake, cloud feedback, and warming than the CMIP6 mean.

This contrasts with previous estimates based on past warming trends.

🔗 esd.copernicus.org/articles/16/...

Twelve polar stereographic maps showing 2-m air temperature anomalies in the Arctic from September 2024 to August 2025. Blue shading is shown for colder anomalies, and red shading is shown for warmer anomalies. All months are warmer than average overall. Anomalies are computed relative to a 1981-2010 baseline.

The regional temperature anomalies across the #Arctic over the last 12 months...

Data from ERA5 reanalysis at doi.org/10.24381/cds...

Ocean stratification in a warming climate - Nature Reviews Earth & Environment Ocean stratification — density-related layering of seawater — influences oceanographic and climatic processes. This Review outlines observed and projected changes in stratification, noting a 0.8% dec−1 increase in 0–2,000 m stratification from 1960–2024, and a further 1.4% dec−1 increase by 2100 under SSP2-4.5.

"Ocean stratification in a warming climate" | Our ( Lijing Cheng et al) new review article in @nature.com Reviews Earth & Environment: www.nature.com/articles/s43...

Marc-Andre Fleury's Penguins reunion — and sendoff — was absolutely perfect.

http://dlvr.it/TNLQ1X

Seasonal and interannual variability in freshwater sources for Greenland's fjords Abstract. The magnitude, source, release location, and timing of freshwater that ends up in the numerous Greenland fjords is of special interest for ice–ocean interactions and ecosystems. In this stud...

Last week I published my first PhD paper on the sources of freshwater for Greenland's fjords (tc.copernicus.org/articles/19/...)

a man in a suit and tie is running down a sidewalk with the words let me in written on it . ALT: a man in a suit and tie is running down a sidewalk with the words let me in written on it .

Trying to find out who the Emiliani lecture is like…

YouTube video by CTV News Climate change was made up by ‘stupid people’: Trump

Trump says climate change predictions were made by "stupid people". I guess I'm a stupid person who now has a chip on my shoulder to make good climate science and show the real stupid people are the ones in the government who are actively trying to burn the world. www.youtube.com/shorts/hhax2...

Rivers in the Sky, Arctic Warming, and What this Means for the Greenland Ice Sheet - UConn Today Characterizing weather extremes from the past to add context to future impacts

Nice article about our recent paper on atmospheric rivers impacting Greenland. 🥼🧪⚒️❄️

Atmospheric River Impacts on the Greenland Ice Sheet Through the Last Interglacial Atmospheric rivers are dynamically coupled to orbit through latitudinal shifts in wind belts and seasonal shifts in moisture availability High latitude moisture controls the frequency, intensity,...

Our paper is out today in @aguadvances.bsky.social 🥳! My coauthors and I use a simulation spanning the Last Interglacial (~130,000 - ~115,000 years ago) to show how changes in Earth's orbit impact atmospheric river behavior and the ensuing impacts on the Greenland ice sheet. 🧪🥼⚒️❄️

🧵

Please send water

Meet the 2025 Ig Nobel Prize winners The annual award ceremony features miniature operas, scientific demos, and the 24/7 lectures.

Amusing coverage of the IgNobel awards
search.app/bekac

With Rice University, a new project called the SCI-SWIM will help our Community Earth System Model trace where water comes from by focusing on stable water isotopes that give clues to the origins of water, from ice sheets to the ocean and everything in between.
news.ucar.edu/133039/new-m...

Thanks man!

Southern Ocean CO2 outgassing and nutrient load reduced by a well-ventilated glacial North Pacific - Nature Communications A better-ventilated North Pacific could have reduced the carbon of water upwelled in the Southern Ocean, reducing outgassing and revealing a remote influence on Southern Ocean biogeochemistry in glaci...

Southern Ocean CO2 outgassing and nutrient load reduced by a well-ventilated glacial North Pacific

www.nature.com/articles/s41...

Also, publishing in @aguadvances.bsky.social was a pleasure. Would recommend!

Thanks to my coauthors (Clay Tabor, Bette Otto-Bliesner, and Juan Lora) for all their help! Also, I want to highlight the original paper for this simulation, which estimated ~3 m of sea level rise from Greenland during the Last Interglacial (agupubs.onlinelibrary.wiley.com/doi/full/10....).

Using the CESM2 Large Ensemble, we find that some of the drivers of elevated atmospheric river activity between the Last Interglacial and future are the same. We can expect to see more summertime storms impacting the Greenland ice sheet in the future, likewise driving extreme melt...

The Last Interglacial was warm due to orbital change, while the future will be warm due to elevated greenhouse gas concentrations. But the Last Interglacial is still a great analogue for future change due to the warmer Arctic...

The preference for summertime storms drives enhanced melt over the ice sheet when the Arctic is warmer. This simulation featured a dynamic Greenland ice sheet, which allowed us to show that storms drive extreme melt at low elevations but ice accumulation up high...

When the Arctic is the warmest, atmospheric rivers that impact Greenland tend to form in the North Atlantic and Pacific, while later they form southward. Notably, the orbital configuration brings more summer storms to the ice sheet early on...

Atmospheric rivers are famous for bringing intense precipitation to the western US and western Europe, but they also drive extreme precipitation and melt events over ice sheets. So we wanted to know how these storms were impacting Greenland, which was smaller during the Last Interglacial...

This drives a poleward shift in atmospheric rivers which is driven in part by thermodynamic changes (moisture) across the Arctic and dynamic changes (winds) across the mid-to-high latitudes. Storms shift southward late in the Last Interglacial when orbit is similar to today...

Warmer high latitudes lead to increased moisture over the Arctic, a poleward shift of the prevailing winds, and a weakened Arctic cyclone. All of which are important for moisture transport towards the Arctic...

Earth's orbit was more eccentric during the Last Interglacial and, early in the Last Interglacial, perihelion was close the the summer solstice. This warmed high latitudes and ultimately contributed to the 5-10 m increase in global mean sea level at the Last Interglacial...