@jfarmersalmanac
Assistant Professor of Geology & Paleoclimate @ UMass Boston's School for the Environment. Climate change, nitrogen cycle, carbon cycle, surfing (not necessarily in that order). https://jfarmersalmanac.com
π£ Our latest IODP Expedition 361 paper:
Southern Ocean carbon stratification across the MPT
π What controlled ice-age CO2?
Our new record reveals recurring deep carbon release β and a surprising decoupling after ~0.3 Ma.
Check it out π
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Fantastic work by Aidan Starr, @ianhall.bsky.social & colleagues published in Paleo Paleo yesterday: Subsurface-to-deep C isotope gradients in the Southern Ocean across the MPT! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Detail of a research ship on the ocean with orange light on the horizon where water meets the dark sky and the text Marine/Large Programs
Job alert! Marine/Large Programs division of @lamont.columbia.edu seeks research scientist to serve as Science Program Officer for @us-sciod.bsky.social Coordination Office to conduct research, data collection/analysis, and outreach. Please share! β‘οΈ https://academic.careers.columbia.edu/#!/177103
If you're interested in ocean carbonate chemistry, check out this new paper π A comprehensive overview of 68 existing ocean carbonate chemistry data products and datasets including cruise data compilations, gap-filled products, model simulations, ..
Please share!
essd.copernicus.org/articles/18/...
Myself and @davidho.bsky.social are convening a panel discussion at #OSM26 on "Ocean science in a time of political uncertainty". Please join us there!
More on NSF funding data
A deeper dive into the numbers of awards by Directorate.
1/9
A suite of benthic Ξ΄18O stacks intended as updates to the LR04 has been published. We compiled new data, updated the chronology, and provided regional stacks. gchron.copernicus.org/articles/8/8...
βοΈ Article: South Pacific carbon uptake controlled by West Antarctic Ice Sheet dynamics
@icbm-uol.bsky.social @awi.de @climate.columbia.edu @lamont.columbia.edu @gisela-winckler.bsky.social
www.nature.com/articles/s41...
At the end of the day, the Black Lives Matter era was about whether people should be killed in the street, and lots of people decided yeah and put those little blue flags on their cars. It spread to everyone because it stopped for no one.
Tomorrowβs front page of the Minnesota Star Tribune: Jan. 23, 2026
π¨New paper out with @alexauderset.bsky.social! We show that the Arabian Sea oxygen minimum zone (OMZ) was better oxygenated during the warm Miocene Climate Optimum than today, but its path to full deoxygenation was slow and complex.
Link to paper: www.nature.com/articles/s43...
We're delighted to announce our latest paper, which argues that seawater chemistry changes may have played a key role in driving the long-term carbon cycle:
www.pnas.org/doi/10.1073/...
Made the cover! This was an awesome program ran by Laurie Juranek and Emily Eidam, and fantastic to see the results of their efforts published.
Congrats to Flavia and colleagues on an important (and really tough-to-get) result!
**Undergraduate Summer Internship Opportunity!
I'm excited to launch the Accessible Ichthyoliths Internship Program starting summer 2026!
Seeking undergraduates interested in contributing to accessible paleo research and communication.
More info here: www2.whoi.edu/site/paleofi...
Please share!
Time series of global temperature anomalies from 1980 to present with predictions for 2025 (made in Dec 2024), and 2026, along with the YTD estimate for the 2025 (with only one month to go).
Scientists are supposed to be happy when their predictions are skillful, right?
Why do I not feel happy?
βοΈ Article: Antarctic Bottom Water progressively filled more of the deep Southern Ocean through the last deglaciation, potentially contributing to the increase in atmospheric CO2
www.nature.com/articles/s41...
Also published yesterday in Nature : Emerging climate impact on carbon sinks in a consolidated carbon budget.
www.nature.com/articles/s41...
(might not be open access sorry)
1/2
We just published the Global Carbon Budget 2025, with a mix of bad news (CO2 emissions continue to grow) and encouraging news (35 countries saw emissions decline over the past decade while growing their economies).
Read the highlights in a short article:
theconversation.com/the-worlds-c...
A magical record! Now 3,000,000 years long! Repost this quote and see if it increases by another order of magnitude.
Lolβed at this earlier. Unfortunately adding zeroes means the proxy will fall apart because most of the excess 230Th will have decayed away by 300 ka π€¦ββοΈπ€·ββοΈ
TY Evan! All credit to Alex Phillips here - we had a rough idea and she turned it into a beautiful illustration. Definitely worth pinging her if youre ever looking for technical grapgic design help - bren.ucsb.edu/people/alexa...
Agree 100%. Send me an email and Iβll send you a pdf (Iβm not hard to find).
Great idea, prob going to need some new materialsβ¦ Iβd be skeptical about the lipid preservation in these 31-year old cores!
Excited to see this, Shannon!!
No astronomy per se in this week's issue of @science.org, but there is a fascinating study by Pavia et al. that uses cosmic dust to trace sea ice coverage in the Arctic. 3He from micrometeorites records when the ocean was ice free, over the last 30,000 years. π§ͺπ
www.science.org/doi/10.1126/...
Frankie & I are extending these paired sea-ice and N cycling proxies to last interglacial. In the interim, I think it's truly open season on the Arctic now. The last 30 kyr chronologies are robust & ready for the full spectrum of new paleo proxies. Reach out if you need materials to test! (8/8)
In the Materials and methods, we evaluate the primary age concerns for the Arctic (hiatuses, authigenic calcite) and rule out both. Foram-bound N isotopes are an exceedingly important tool for clarifying the age of Arctic sediments, and thereby allowing the application of tools like 230Th_xs (7/n)
Using one of the flux proxies, excess 230Th, requires strong constraints on sediment ages. This has been a problem in the Arctic for some time. If you're interested in this question, check out the Materials and methods: (6/n)
www.science.org/doi/suppl/10...
The power of this approach is it doesn't require any fossils or biomarkers: it's a completely abiotic proxy of relative sea-ice extent. And it should be applicable anywhere in the Arctic Basin (or even Antarctic?) in sediment cores > 1000 m water depth (5/n).