Jordan Abell

Join the Laboratory of Tree-Ring Research at the University of Arizona for our 2026 Dendrochronology Intensive Summer Course (DISC)! Spend 3 great weeks (May 18th to June 5, 2026) in the field, lab, and classroom learning first-hand how tree-ring research is done! ltrr.arizona.edu/summerschool

Cosmic dust reveals dynamic shifts in central Arctic sea-ice coverage over the past 30,000 years Arctic sea-ice loss affects biological productivity, sustenance in coastal communities, and geopolitics. Forecasting these impacts requires mechanistic understanding of how Arctic sea ice responds to ...

Huge paper for the Arctic Ocean published today in @science.org - a new 30,000 year history of Arctic Ocean sea-ice cover reconstructed from the accumulation of cosmic dust-derived helium-3! www.science.org/doi/10.1126/... (1/n)

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. 🧪🌊
www.science.org/doi/10.1126/...

📣My department is hiring a hydrogeologist!📣 Note the priority application deadline of Nov. 15. Find me at #GSA2025 or email me if you have questions. We’re excited to find our next new colleague! Please share!

Reminder ! Only 2 days left …

Tenure-Track Junior Professor Chairs | Site Web IRD Procedures and timetable for pre-selections and auditions for junior professorships.

New job alert! We just opened a tenure-track Junior professor Chair at @cerege.bsky.social focused on the study of the critical zone in the Mediterranean and intertropical Africa. More info on the IRD website here:
en.ird.fr/tenure-track...
Contact me if you are interested!

A Nutrient Effect on the TEX86 Paleotemperature Proxy Nutrient stress alters GDGT distributions in marine sediments, resulting in elevated TEX86 ${\text{TEX}}_{86}$ values beyond those related to thermal effects Paleoclimate case studies from the Ar...

Now published in @agu.org Geophysical Research Letters!

What happens to marine archaea when they’re hungry? And what does that mean for the TEX₈₆ paleothermometer?

Full paper here: doi.org/10.1029/2025...

Thanks to my coauthors and mentors for their support — and stay tuned, more is coming!

The NSF cuts are nothing short of a scorched-earth attack on US science, orchestrated w/political cynicism & total disregard for US scientific leadership. A 7% success rate doesn’t incentivize innovation; it tells researchers to take their talent elsewhere.
nsf-gov-resources.nsf.gov/files/00-NSF...

Trump administration cuts to NSF will result in more than 200,000 FEWER people per year involved in basic science, training, and education - what should have been the next generation of US scientists. This isn't even eating your seed corn, it is setting your seed corn on fire and salting the earth.

My department at Lehigh University is hiring a Laboratory Facilities Technician. Beautiful research spaces, a great community, and lots of interesting science to do! For more info: tinyurl.com/2vm3h5p9 www.lehighoceans.org ees.cas.lehigh.edu #GeoJobs #OceanJobs #SciJobs

Extreme Indian summer monsoon states stifled Bay of Bengal productivity across the last deglaciation Nature Geoscience - Changes in terrestrial runoff into the Bay of Bengal during both extremely weak and strong Indian summer monsoon phases since the Last Glacial Maximum caused a collapse in...

New paper alert 🚨🚨 Here we posit a non-linear relationship between Indian Summer #Monsoon (ISM) intensity & marine productivity in the Bay of #Bengal: extremely weak & strong #ISM states of the last 22,000 yrs were *both* associated with sharp disruptions to primary production! (1/6)

rdcu.be/ejJD2

If you are at EGU and want to hear about my research on jet stream variability in the Pliocene, come along to session CL4.2 on Thursday. I am presenting at 11:10 ⛅

NOAA to decommission 14 datasets related to earthquakes, oceans, satellites, agency announces
nesdis.noaa.gov/about/docume...

"Effective today, sources tell Science, NSF’s division of grants and awards is returning all grant proposals previously approved for funding and awaiting final signoff to the program officers who oversaw the initial review. In the meantime ... NSF will not make any new awards." 😞

Deadline approaching - if you have questions drop us an email

Come work at SU EES! There is a growing community of postdocs here

Science people: how are you addressing current events at our scientific institutions in classes, if at all?

Movin' on up - we're an R1 now! Just an official recognition of the great work being done at Lehigh!

Power by Proxy: Participation as a Resource in Global Governance - The Review of International Organizations Member state participation is essential in global governance, affording international organizations (IOs) legitimacy and translating member state preferences into institutional attention. We contend t...

Some IOs - like the IMF, UNSC, and the WHO - group small states together in 'proxy' systems, while powerful states speak for themselves. In new (open access!) work with @rickyclark.bsky.social and Ayse Kaya in @the-peio.bsky.social, we focus on the case of climate change in the IMF. 1/3

It was a pleasure to collaborate on this fascinating work, now published in AGU Advances! 📖
Pliocene Warmth and Patterns of Climate Change Inferred From Paleoclimate Data Assimilation agupubs.onlinelibrary.wiley.com/doi/10.1029/...
#DRIscience #AGUPubs #OpenAccess @agu.org
@aguadvances.bsky.social

I'm looking for #postdoc opportunities! 👷‍♂️⛏️
I’m a researcher specialising in #geoarchaeology, #sedimentology, and #taphonomy. With 40+ field seasons and a passion for site formation processes, I’m excited to bring my expertise to new collaborations. Complete CV below 👇#geology

Wind erosion in northern China: Insights from the western Qaidam fold belt, Loess Plateau, and Hami Basin Pliocene – Quaternary wind erosion profoundly modified the physiography of northern China at a large range of spatial (10 m to >100 km) and temporal (…

‼️ New paper ‼️

Combining over a decade of research by our groups along with previous work, Kapp et al. provide new insights into the interplay of wind, tectonics, surficial geology, and dust dynamics during the late Neogene and Quaternary in northern China.

www.sciencedirect.com/science/arti...

Shifting Antarctic Circumpolar Current south of Africa over the past 1.9 million years Shifts in the world’s largest ocean current are closely linked to Southern Ocean upwelling during warm intervals in Earth’s past.

Blwyddyn Newydd Dda / Happy New Year 2025!

Great to see our latest IODP EXP 361 paper out today:

Shifting Antarctic Circumpolar Current south of Africa over the past 1.9 million years www.science.org/doi/10.1126/...

We are hiring! Full details at the link below. We are looking for 2 postdocs to work on reconstructing past sea surface temperatures and sea ice distributions as part of the "Past 2 Future" consortium seeking to improve climate models with palaeoclimate data durham.taleo.net/careersectio...

I’m recruiting grad students for Fall 2024. If you’re interested in #paleotempestology or #paleoclimatology (preferably using sediment or tree rings but happy to explore other archives) and will be at #AGU24, please get in touch! (Get in touch even if you’re not going to be at #AGU2024.) @agu.org

I’m recruiting a PhD student to join my lab @ Clemson Uni in Fall ‘25. If you are interested in #paleotempestology or #paleoclimatology, esp. over the late Holocene or Common Era, please reach out! Must have experience working with paleoclimate proxies, preferably sediments or tree rings.

Award details | Funding and scholarships for students | University of Exeter

🚨PhD project in paleoclimatology🚨

Come join our friendly team to investigate:

“Tracking the biological response to the ancient South Asian monsoon: lessons from the past to inform the future”

Sediment, foraminifera, geochemistry, biology…

Pass it on!

🧪⚒️🌊🌍

www.exeter.ac.uk/study/fundin...

Carbon Cycle and Circulation Change in the North Pacific Ocean at the Initiation of Northern Hemisphere Glaciation Constrained by Boron‐Based Proxies in Diatoms δ11B and [B] in diatom frustules reveal a surface water increase of 0.3–0.5 pH units in the subarctic Pacific Ocean over the iNHG These changes would have lowered atmospheric pCO2 and contributed...

Want a distraction from todays news? Then why not read this: agupubs.onlinelibrary.wiley.com/doi/full/10.... by Hannah Donald, @geaswann.bsky.social, @mudwaterclimate.bsky.social and me! We use boron isotopes in diatoms to constrain pH change in the N Pacific during the iNHG 2.7 million years ago🧪⚒️🌊