#isotope — Public Fediverse posts

Démystifier la saison des sucres
🔸En acériculture, les croyances populaires sont nombreuses, mais que dit la science ?
Par Pierre-Etienne Caza
https://actualites.uqam.ca/2026/demystifier-la-saison-des-sucres/
#sucre #érable #recherche #science #nature #eau #UQAM #thèse #acériculture #Québec #eau #arbre #racines #tronc #feuilles #biologie #botanique #deutérium #isotope #plantation #neige #froid #branches #sol #environnement #écologie

Climatic And Anthropogenic Controls On Late Holocene Sediment Transport To The Gulf Of Mexico By The Mississippi River
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https://doi.org/10.1016/j.earscirev.2026.105401 <-- shared paper
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#water #hydrology #hydrography #humanimpacts #human #settlement #anthropogenic #levees #engineering #spatialanalysis #spatialtemporal #erosion #weathering #Mississippi #River #Sediment #Provenance #Zircon #grainsize #alluvial #alluvium #hydrogeomorphology #headwater #coast #coastal #delta #geology #Holocene #geochemistry #Sr #Nd #isotope #Strontium #Neodymium #detrital #climate #GulfofMexico

RE: https://mstdn.social/@archaeology/115957273416138213

A great and detailed #study about early #medieval #migration events to #England from 400–1100 AD. The study concludes that, contrary to the #traditional #narrative, there was no abrupt migration event, but rather that England was settled #continuously. This is supported by #oxygen #isotope #analysis of human #teeth.

This text © #StefanFWirth 2026

The #copper #isotope #Cu-64 plays an important role in medicine: it is used in imaging processes and also shows potential for #cancer therapy. However, it does not occur naturally and must be produced artificially
#MolecularScience #Chemistry #sflorg
https://www.sflorg.com/2025/12/mols12052501.html

29-Oct-2025
study uses ancient plant to decode #Earth's #climate history
the study focuses on #horsetails — hollow-stemmed #plants that have thrived on Earth for more than 400 million years. The team’s findings reveal that #water traveling through these plants undergoes such intense natural #distillation that its #oxygen #isotope ratios resemble those found in meteorites or in extraterrestrial materials.

https://www.eurekalert.org/news-releases/1103877

#science #evolution #paleontology

⏰New paper⏰

Very excited to share our more recent paper published today in @nature Communications, where we show based on #clumped #isotope measurements in a giant sea #snail 🐚 that Europe experienced a monsoon-like climate during the #Eocene high-CO2 period.

https://www.nature.com/articles/s41467-025-64241-0

Earth’s 8th Continent Buried Under The Pacific Finally Mapped By Scientists [Zealandia / Te Riu-a-Māui - “Finally”? ~wink~]
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https://dailygalaxy.com/2025/10/earth-8th-continent-finally-mapped/ <-- shared (somewhat) technical article
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https://doi.org/10.1029/2023TC007961 <-- shared 2023 paper
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https://youtu.be/DDbc4K7bgnA?si=EZFmmPFybPLLyND7 <-- shared animation
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"KEY POINTS
• Basalts and pebbly to cobbly sandstones have been dredged from the Fairway Ridge, Coral Sea
• Dating of the rocks and interpretation of magnetic anomalies allow mapping of major geological units across North Zealandia
• This work completes offshore reconnaissance geological mapping of the entire 5 million square km Zealandia continent…”
#geology #doggerland #Zealandia #TeRiuaMaui #godwana #godwanaland #cretaceous #mapping #geologicmapping #spatialanalysis #model #modeling #NewZealand #SouthPacific #continent #sampling #sediment #dredging #petrography #geochemistry #isotope #analyses #research #cenozoic #intraplate #platetectonics #tectonics #eocene #remotesensing #geophysics #geomagnetism

For atomic nuclei, I understand that there is a stability benefit for having even numbers of protons or neutrons, and I understand why having too few neutrons would be destabilizing due to charge-charge repulsion, but why does having too *high* a number of neutrons also lead to nuclear instability? #science #chemistry #nuclear #isotope

“With the global #isotope market expected to grow from just over 13 billion Canadian dollars a year to over 45 billion Canadian dollars a year in the next decade, #Canada has a unique opportunity to lead and prosper.”

#FirstNations #cancertreatment #health #nuclear #Ontario #BrucePower

https://www.windspeaker.com/news/windspeaker-news/bruce-power-saugeen-ojibway-nation-and-canada-fight-cancer-together-isotope

Proud to be on this publication in GCA by Barbora Krizova et al. We show #clumped #isotope reordering in #Cretaceous rudist bivalves is location-specific. Understanding burial history is essential for selecting shell material for #paleoclimate #reconstructions. https://www.sciencedirect.com/science/article/pii/S0016703725004193

The #clumped #isotope paleo temperature proxy is one of the most reliable means of temperature reconstruction in #geology. This new study shows that it can be applied equally on various carbonate minerals (calcite, aragonite, dolomite, witherite and siderite).

https://www.sciencedirect.com/science/article/pii/S0016703725003072

Check out our latest #preprint in which we use a combination of #clumped and #oxygen #isotope measurements to reconstruct extreme summer temperatures experienced by #fossil #rudist bivalves from the Late #Cretaceous in Oman. All feedback is welcome!
https://egusphere.copernicus.org/preprints/2025/egusphere-2025-2308/

I remember Jeremy McCormack presenting this nice #zinc #isotope dataset @ EGU this year showing how #Miocene sharks had diverse roles in the marine foodweb. Great study, glad to see it found a nice home in EPSL!
https://www.sciencedirect.com/science/article/pii/S0012821X25001918

Pretty cool study showing that #isotope #analyses in #primate #teeth can be used to reconstruct the #season of birth and changes in the #hydrology in the animal's environment.
www.sciencedirect.com/science/article/pii/S001670372500287X

This phenomenal study by Alexandre Pohl and colleagues investigates in a very comprehensive way how estimates of the #oxygen #isotope composition of seawater bias our #climate reconstructions, one of the most important uncertainties in #paleoclimate research.

https://www.sciencedirect.com/science/article/pii/S0012821X25002171

Amino acid-specific #isotope analysis is really shaping up like a very promising tool for #paleo #ecology and #environmental studies!
https://www.sciencedirect.com/science/article/pii/S0031018225003256

A very cool study using #clumped #isotope measurements in #oyster shells from the Early #Cretaceous showing high and variable #seasonality in response to climate changes caused by atmospheric #CO2 shifts. #mollusk shells again demonstrated as useful climate archives!
https://www.science.org/doi/10.1126/sciadv.adr9417

#isotope enabled #climate #modelling brings reconstructions and models together more closely for the Late #Cretaceous, a warm period with high #greenhouse gas concentrations in the atmosphere (and dinosaurs!)
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024PA005002

#QuizOfTheDay: Which of the following #Radioactive #Isotope is used for determining the age of an object containing organic material / archeological specimens in fossils?

A. Carbon-14
B. Uranium-238
C. Rubidium-87
D. Nitrogen-14

https://knowledgezone.co.in/resources/quiz?qId=642c0dc63c77d46a625c2880

Nice study testing models for #solid #state #reordering of #clumped #isotope values in #carbonate.
https://www.sciencedirect.com/science/article/pii/S0016703725001012

Exploring macroevolutionary links in multi-species #planktonic #foraminifera Mg∕Ca and stable #oxygen #isotope from 15 Ma to recent @EGU_BioGeo https://bg.copernicus.org/articles/22/1095/2025/

Great paper by Gray and Brandon @G-cubed @Agu on the #clumped #isotope #temperature relationship in gar fish scales. I especially enjoyed reading about the treatment of effective vs mean temperatures and seasonal bias in these calibration studies.
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024GC011714

"Good god! Do you realize what you've done?"

"Not quite."

"You've duplicated the pope! Except the new one is a bit heavier."

"True. That's because he is an isopope."

#pope #doppelganger #duplicate #isotope #isopope #nonsense

A long-term #drought reconstruction based on #oxygen #isotope tree ring data for central and eastern parts of Europe (Romania) https://bg.copernicus.org/articles/22/55/2025/

No better way to start the new #research year than with a new paper! Enjoy our review on #isotope #sclerochronology on #molluscs led by Andy Johnson! 🥳🍾
https://www.sciencedirect.com/science/article/pii/S0277379124005705

Despite increased millet farming, herders in Xinjiang's Keriya Valley #ancientchina stuck to traditional grazing 🐑 #isotope #palaeodiet study reveals. Most animals grazed on C3 plants in oases during #BronzeAge /#IronAge, but some surprising C4 signals in cattle & camel remains. 🏺 #archaeology

Dietary reconstruction of dome...