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Reposted by Jesse Farmer

科学探求おしゃべり番組「ススメ！有孔虫」 @susume-foram.bsky.social · 4d

Tiny fossils called foraminifera lie buried in marine sediments.
Their shells display astonishing diversity from spiraling forms to chambered clusters and even architectures that resemble miniature buildings.
But what if this morphological variety could be explained by only a few simple rules? 1/n

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

This is a killer figure. Amazing work @anya-hess.bsky.social !

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

Shout out to the coauthors here: @oceanandclimate.bsky.social, @amglab.bsky.social, @oceansclimatecu.bsky.social, @alexauderset.bsky.social on bsky, Christina Ravelo, Fabian Batista, Stefano Bernasconi, Abby Ren, Gerald Haug, & Danny Sigman. And thanks to NSF and @maxplanck.de for support! (fin)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

Also, while it appears that T variations dominate the remineralized C signal in mixed-layer dwelling foram B isotopes, it would be super interesting to look at the shallow subsurface dweller d11B. Anybody willing/able to do d11B in G. tumida??? @chalkyoceans.bsky.social @mudwaterclimate.bsky.social

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

Last, a couple interesting (to me) followups. Our study diagnoses stable upwelling as the mean state of the Plio-Pleistocene tropical Pacific. But this does not rule out upwelling variations on shorter timescales. V interesting work by Kristin Kimble et al. & more to do at high res... (12/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

This is more confirmation of the tendency for ODZs to contract under global warming. Credit to Becky Robinson for originally postulating this for the Plio-Pleistocene on the basis of bulk sediment δ15N: www.sciencedirect.com/science/arti... (11/n)

Expansion of pelagic denitrification during early Pleistocene cooling

Bioavailable nitrogen is removed from the oceans in oxygen-deficient benthic and pelagic environments by denitrification. Future warming is predicted …

www.sciencedirect.com

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

The long-term N isotope increases in both the western & eastern equatorial Pacific indicate that the Pacific oxygen deficient zones expanded/intensified as climate cooled. We can nail down the Pacific ODZs here as @alexauderset.bsky.social's work rules out a similar change in the Atlantic... (10/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

The end result is that continual nutrient upwelling in the eastern equatorial Pacific over the last 5 million years emerges from an elegant balance between Plio-Pleistocene strengthening of the trade winds & strengthening of the thermal stratification due to stronger cooling of mode waters (9/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

We can be more quantitative about the impact of this thermal stratification breakdown. Thx to @oceansclimatecu.bsky.social, we ran a box model showing that the thermal stratification breakdown can effectively compensate for reduced wind forcing to maintain the same upwelling rate (8/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

Much discussion w/ Pat, Danny Sigman, & Christina Ravelo led to this figure. If the Pliocene subsurface had warmed more than the surface, & nutrient inventories are stable (red line), then its possible to maintain nutrients in the eastern equatorial Pacific surface even with warmer waters! (7/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

The high latitude oceans are largely salt stratified. Changes to this stratification are central to explanations for the ice ages. In contrast, the tropics are thermally stratified. Heather's data of amplified Pliocene subsurface warming seemed important for stratification... (6/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

When we first starting thinking in detail about the Pliocene tropical Pacific in the context of the N isotope records, @hl-ford.bsky.social's subsurface temperature data really resonated: agupubs.onlinelibrary.wiley.com/doi/full/10.... (5/n)

The evolution of the equatorial thermocline and the early Pliocene El Padre mean state

A 5 Myr record of subsurface temperatures from the western Pacific warm pool is presented Equatorial thermocline was warm, deep, and weakly tilted during the Pliocene El Padre mean state Thermoclin...

agupubs.onlinelibrary.wiley.com

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

My research has been much more high-latitude focused, so this was my onboarding to the equatorial Pacific. Also invaluable to have shared an office @ajacobel.bsky.social while at @lamont.columbia.edu and assimilate her (and Kassandra Costa's) encyclopedic knowledge of the eqPac... (4/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

@oceanandclimate.bsky.social thoroughly covered the N isotopes and their interpretation. Measuring many of the foram-bound N isotopes was 1) really fun, and 2) honestly critical salary support for my postdoc days. Really game-changing to have ECRs helping fellow ECRs - thx Pat! (3/n)

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

Great press release from @umassboston.bsky.social here. I have less hair & more gray than when this project started 😅.. but not as a result of this project particularly 🤪 www.umb.edu/news/recent-... (2/n)

Nitrogen In Fossils Indicates Climate Resilience in Pacific Ocean Upwelling

By studying the shells of ancient plankton, Jesse Farmer and his colleagues have explored the state of the tropical Pacific during the warm Pliocene Epoch. Their study, published this week in the jour...

www.umb.edu

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Jesse Farmer @jfarmersalmanac.bsky.social · 6d

Very excited to be a part of this epic journey with @oceanandclimate.bsky.social. Check out our #NSFfunded paper published in @science.org today & his thread below. After that, come back here for more... (1/n)

Patrick Rafter @oceanandclimate.bsky.social · 6d

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/...

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 ...

www.science.org

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Reposted by Jesse Farmer

Lauren Rosenthal @laurenthal.bsky.social · 9d

Electricity now costs 267% more (!!) for 1 month vs. what it cost 5 years ago near data center hotspots. Awesome reporting from Josh Saul @dinabass.bsky.social Leonardo Nicoletti @naurtorious.bsky.social Demetrios Pogkas (gift link) www.bloomberg.com/graphics/202...

AI Data Centers Are Sending Power Bills Soaring

Wholesale electricity costs as much as 267% more than it did five years ago in areas near data centers. That’s being passed on to customers.

www.bloomberg.com

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Jesse Farmer @jfarmersalmanac.bsky.social · 12d

I received a GRFP as a 2nd year PhD student. It opened up an avenue of research that my lab is still focused on today. And I’ve got two awesome 2nd year students who were assembling competitive GRFP applications.

I’m done with this program.

Science Magazine @science.org · 12d

NSF today released instructions for the next round of applicants to its Graduate Research Fellowship Program. A key group—second-year Ph.D. students—is no longer eligible, and students who are still able to apply will face an unusually narrow timeframe. https://scim.ag/3KlQkQk

‘Completely shattered.’ Changes to NSF’s graduate student fellowship spur outcry

The announcement comes months later than usual, leaving many would-be applicants stranded

www.science.org

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Reposted by Jesse Farmer

Brandon Bishop @brandontbishop.bsky.social · 14d

Really cool paper looking at the onset/ongoing initiation of subduction of the Caribbean plate beneath the Isthmus of Panama.

And another call for the paleo and bio people to deal with North America and South America being in contact with each other since at least the Miocene, not the Pleistocene.*

Breaking the Caribbean Plate: Subduction Initiation Beneath the Northern Margin of Panama

We present a newly relocated earthquake catalog for Northwestern South America and eastern Panama This catalog includes the 25 May 2025 Mw 6.5 earthquake and aftershocks that show subduction of t...

agupubs.onlinelibrary.wiley.com

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Jesse Farmer @jfarmersalmanac.bsky.social · 14d

Good stuff! We revisited the marine records earlier this year w/ new proxy data). Strong evidence of Pac-Caribbean separation at/after 4.1 million years ago. Still lots to sort out re: tectonic-oceanographic-biotic dependencies!
agupubs.onlinelibrary.wiley.com/doi/full/10....

Early Pliocene Shoaling of the Central American Seaway Reconstructed From Foraminifera‐Bound Nitrogen and Oxygen Isotopes

Foraminifera-bound nitrogen isotopes trace the early Pliocene restriction of nutrient exchange across the Central American Seaway Geochemical data indicate four phases of seaway shoaling between ...

agupubs.onlinelibrary.wiley.com

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Reposted by Jesse Farmer

Gavin Schmidt @climateofgavin.bsky.social · 21d

A quick summary by me of a new instance of an old story.

@realclimate.org Time and Tide Gauges wait for no Voortman www.realclimate.org/index.php/ar...

RealClimate: Time and Tide Gauges wait for no Voortman

RealClimate: Here we go again. An obscure, methodologically poor, paper published with little to no review makes a convenient point and gets elevated into supposedly 'blockbusting' science by the merc...

www.realclimate.org

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Reposted by Jesse Farmer

Jessica Tierney @leafwax.bsky.social · 22d

The special issue @quantamagazine.bsky.social on Climate Science just dropped and I know what my weekend readings is gonna be 👍🏻 www.quantamagazine.org/how-we-came-...

How We Came To Know Earth | Quanta Magazine

Climate science is the most significant scientific collaboration in history. This series from Quanta Magazine guides you through basic climate science — from quantum effects to ancient hothouses, from...

www.quantamagazine.org

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Reposted by Jesse Farmer

Kelly Hereid @kellyhereid.bsky.social · 22d

I would just like to point out that this is a spectacular choice of cover image for this story.

Yale Climate Connections @climateconnections.bsky.social · 23d

🔥 The world’s top climate scientists have found that global warming is accelerating. Oceans are rising faster than ever, and the 1.5°C target is slipping away, but there’s still a narrow path forward. #ClimateAction

Climate change is accelerating, scientists find in ‘grim’ report » Yale Climate Connections

They warn that humanity is just three years from overshooting the Paris Agreement’s 1.5°C target, with seas rising faster than ever. But the report also contains a little bit of good news.

yaleclimateconnections.org

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Reposted by Jesse Farmer

Prof. Sonia I Seneviratne @soniaseneviratne.bsky.social · 28d

Hot off the press: We can provide for the first time a systematic attribution of recent #heatwaves to the emissions of #carbon_majors. Essential new #Nature article coordinated by @yannquilcaille.bsky.social at @ethz.ch, with numerous contributors @usyseth.bsky.social:
www.nature.com/articles/s41...

www.nature.com

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Jesse Farmer @jfarmersalmanac.bsky.social · Sep 6

Congratulations to @paleonotthediet.bsky.social for a banner week at ICP15! Really excited to see tons of cool data from Exp 383 that will be hitting the presses soon…

Shalan McDonagh @paleonotthediet.bsky.social · Sep 6

Especially honored to have received Honorable Mention in the Biogeochemical and Climate session. Could not have done it without my advisor @jfarmersalmanac.bsky.social and colleagues for their guidance and support. Already looking forward to #ICP16

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