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ninadavtian.bsky.social
Dr. Nina Davtian (she/her/hers)
@ninadavtian.bsky.social
3.9K followers 2.1K following 550 posts
@cnrs-insu.bsky.social researcher at @climatecerege.bsky.social. Using biomarkers to study climate, ocean, and environment of the past. @icta-uab.bsky.social alumna. ORCID: https://orcid.org/0000-0002-3047-6064 🇫🇷 -> 🇪🇸 -> 🇫🇷
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ninadavtian.bsky.social
Dr. Nina Davtian (she/her/hers) @ninadavtian.bsky.social · Nov 3
Hello! 👋🏻
Trained as a geologist, I do paleo-reconstructions using molecular fossils, aka biomarkers.
My favorite biomarkers are archaeal and bacterial membrane-spanning lipids—glycerol dialkyl glycerol tetraethers, GDGTs.
A 🧵 of 🧵 on my five most significant papers in chronological order: 👇🏻
(1/7)
White mug with two membrane-spanning lipids drawn on it. The molecule drawn in green is a bacterial membrane lipid whereas the molecule drawn in blue, red, and yellow is a famous archaeal membrane lipid named crenarchaeol. Mug acquired during the 2nd international GDGT workshop on 6–8 September 2023 at ETH Zürich, Switzerland. Photo taken by Nina Davtian (it's me!).
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Reposted by Dr. Nina Davtian (she/her/hers)
natgeosci.nature.com
Nature Geoscience @natgeosci.nature.com · 5d
⚒️ Comment: The Greenlandification of Antarctica

www.nature.com/articles/s41...
Antarctica surrounded by time-series comparing the temporal evolution of parameters of Greenland and Antarctica
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Reposted by Dr. Nina Davtian (she/her/hers)
andy-baker.bsky.social
Andy Baker @andy-baker.bsky.social · 2h
MOFs are in the news, thanks to a Nobel Prize for #Chemistry.

MOFs = metal organic frameworks, complex molecules. They can help break down environmental contaminants such as #PFAS, or PAHs such as naphthalene, as published by Ze Li this year:
www.sciencedirect.com/science/arti...
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Reposted by Dr. Nina Davtian (she/her/hers)
jcamthrash.bsky.social
Cameron Thrash @jcamthrash.bsky.social · 7h
Direct single-molecule detection and super-resolution imaging with a low-cost portable smartphone-based microscope www.nature.com/articles/s41... #jcampubs
Direct single-molecule detection and super-resolution imaging with a low-cost portable smartphone-based microscope - Nature Communications
Loretan and colleagues present a low-cost smartphone-based microscope capable of detecting single-molecule fluorescence. This approach opens doors to personalised and widely distributed applications in diagnostics, biosensing, and science education.
www.nature.com
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Reposted by Dr. Nina Davtian (she/her/hers)
agu.org
AGU (American Geophysical Union) @agu.org · 7h
💡The Scientific Program for #AGU25 is now available! 📓➡️ Review the schedule and be sure to register by 6 November to take advantage of early-bird rates: buff.ly/PT0Ootk
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Reposted by Dr. Nina Davtian (she/her/hers)
kellyhereid.bsky.social
Kelly Hereid @kellyhereid.bsky.social · 4h
Sheesh - a tsunami big enough to push coral boulders 100s of m inland in the British Virgin Islands around the year 1400, likely sourced from an earthquake on the Puerto Rico Trench.
thirstygecko.bsky.social
Kevin Anchukaitis @thirstygecko.bsky.social · 4h
This is cool - new paper from Hali Kilbourne et al. 'Dating a Medieval Tsunami With Uranium-Series Techniques on Caribbean Corals' agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Dating a Medieval Tsunami With Uranium‐Series Techniques on Caribbean Corals
Uranium-series analyses provide dates for 15 annually banded coral skeletons on the low Caribbean island of Anegada A subset of the corals was likely washed ashore in a Puerto Rico Trench tsunami...
agupubs.onlinelibrary.wiley.com
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Reposted by Dr. Nina Davtian (she/her/hers)
thirstygecko.bsky.social
Kevin Anchukaitis @thirstygecko.bsky.social · 4h
This is cool - new paper from Hali Kilbourne et al. 'Dating a Medieval Tsunami With Uranium-Series Techniques on Caribbean Corals' agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Dating a Medieval Tsunami With Uranium‐Series Techniques on Caribbean Corals
Uranium-series analyses provide dates for 15 annually banded coral skeletons on the low Caribbean island of Anegada A subset of the corals was likely washed ashore in a Puerto Rico Trench tsunami...
agupubs.onlinelibrary.wiley.com
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Reposted by Dr. Nina Davtian (she/her/hers)
ianhall.bsky.social
Ian Hall @ianhall.bsky.social · 3h
Four things to know about climate change and human migration

phys.org/news/2025-10...
Four things to know about climate change and human migration
Climate change is making some regions less habitable for humans, whether by raising sea levels, hurting crop yields, or intensifying droughts, storms, and wildfires. Yet, if you ask people why they're...
phys.org
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Reposted by Dr. Nina Davtian (she/her/hers)
The Keeling Curve @keelingcurve.bsky.social · 5h
424.06 parts per million (ppm) CO2 in air 07-Oct-2025
keelingcurve.ucsd.edu
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
keelingcurve.ucsd.edu
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Reposted by Dr. Nina Davtian (she/her/hers)
cnrs.fr
CNRS @cnrs.fr · 8h
Existe-t-il des océans enfouis à l’intérieur de notre planète ? 🤔 Nathalie Bolfan-Casanova, géologue au CNRS, travaille sur des roches remontées de très grande profondeur pour analyser la composition de la Terre. 🌏
Brève de science : sonder les profondeurs
Existe-t-il des océans enfouis à l’intérieur de notre planète ?
www.cnrs.fr
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Reposted by Dr. Nina Davtian (she/her/hers)
astropierre.com
Astropierre @astropierre.com · 13h
Changement climatique, effondrement de la biodiversité... Et si nous étions entrés dans une nouvelle ère géologique, l’ #Anthropocène ?

Une synthèse graphique réalisée par Claire Marc avec la précieuse aide de Jérôme Gaillardet @ipgp.bsky.social

#vulgarisation #SVT #Terminale

Thread à dérouler ⬇️
Infographie "Pourquoi parler de l'Anthropocène ?"
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Reposted by Dr. Nina Davtian (she/her/hers)
zacklabe.com
Zack Labe @zacklabe.com · 10h
Last month observed above average temperatures across large portions of both the #Greenland and #Antarctic Ice Sheets. Anywhere in dark red shading is more than 5°C warmer than the 1981-2010 climatological average.

Data available from doi.org/10.24381/cds...
Map of Greenland showing 2-m air temperature anomalies in September 2025. Red shading is shown for warmer than average temperatures, and blue shading is shown colder than average temperatures. Anomalies are calculated relative to 1981-2010. Polar stereographic map of 2-m air temperature anomalies in the Antarctic for September 2025. Red shading is shown for warmer anomalies, and blue shading is shown for colder anomalies. There is a sharp gradient in temperature anomalies across the region. Anomalies are calculated relative to a 1981-2010 baseline.
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Reposted by Dr. Nina Davtian (she/her/hers)
linusvogt.bsky.social
Linus Vogt @linusvogt.bsky.social · 6d
🚨🌊 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/...
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...
esd.copernicus.org
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Reposted by Dr. Nina Davtian (she/her/hers)
jonbakerocean.bsky.social
Jon Baker @jonbakerocean.bsky.social · 10h
🎥 My recent ClimTip talk on our Nature paper is now online!

We find that an AMOC collapse is unlikely this century as Southern Ocean winds pull deep waters to the surface, stabilising it in a weakened state.

Still, the global ocean circulation is expected to change greatly as the planet warms 🌊
Will the AMOC Collapse? Insights from Climate Models | Jonathan Baker | ClimTip Webinar
YouTube video by ClimTip
www.youtube.com
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Reposted by Dr. Nina Davtian (she/her/hers)
tinyicybubbles.bsky.social
Thomas Bauska @tinyicybubbles.bsky.social · 11h
Updated a classic.
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Reposted by Dr. Nina Davtian (she/her/hers)
soniachaabane.bsky.social
Sonia Chaabane @soniachaabane.bsky.social · 13h
🌊🎙️ Nouveau podcast : @nicolas-roche.bsky.social, les procédés innovants de dépollution des eaux usées.
Plongez dans les coulisses de la dépollution, découvrez des technologies audacieuses pour préserver l’eau.
👉 À écouter absolument : youtu.be/I_ne_JOtRdw?...

@cerege.bsky.social
Nicolas Roche, les procédés innovants de dépollution des eaux usées
YouTube video by Aix Marseille Université
youtu.be
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Reposted by Dr. Nina Davtian (she/her/hers)
climatereefs.bsky.social
Tropical Climate Variability & Coral Reefs (SPP 2299) @climatereefs.bsky.social · 13h
Next talk by Mandy Freund @climatefreund.bsky.social about "ENSO during the past millennium"
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Reposted by Dr. Nina Davtian (she/her/hers)
climatereefs.bsky.social
Tropical Climate Variability & Coral Reefs (SPP 2299) @climatereefs.bsky.social · 15h
Ben Henley @benhenley.bsky.social kicking off the 3rd day of the #SPP2299 "Meeting & Status Seminar 2025" with a keynote on "Heighest ocean heat in four centuries places Great Barrier Reef in danger"
@marumunibremen.bsky.social
@dfg.de
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Reposted by Dr. Nina Davtian (she/her/hers)
planet-terre.bsky.social
Planet-Terre @planet-terre.bsky.social · 16h
Les nucléides cosmogéniques, des outils pour comprendre la dynamique de la surface terrestre
– Origine, mesure des nucléides cosmogéniques. Applications : durée d’exposition, taux de dénudation, profils, enfouissement
– par Vincent Godard #géologie #teamSVT planet-terre.ens-lyon.fr/ressource/nu...
Affiche de présentation d’une conférence traitant des nucléides cosmogéniques, origine, mesure, application.
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Reposted by Dr. Nina Davtian (she/her/hers)
zacklabe.com
Zack Labe @zacklabe.com · 23h
The Relative Oceanic Niño Index (RONI) continues to show our gradual shift to more La Niña-like conditions in the equatorial Pacific Ocean. Seasonal forecast models still highlight a La Niña emerging through this coming boreal winter

Graphic updated in near-real time at zacklabe.com/climate-chan...
Time series of the relative oceanic nino index (RONI) from 1950 to 2025. Labels are shown for El Nino or La Nina conditions. There is significant variability over time.
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Reposted by Dr. Nina Davtian (she/her/hers)
ianhall.bsky.social
Ian Hall @ianhall.bsky.social · 1d
Extremely poleward shift of Antarctic Circumpolar Current by eccentricity during the Last Interglacial

www.nature.com/articles/s41...
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.
www.nature.com
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Reposted by Dr. Nina Davtian (she/her/hers)
hausfath.bsky.social
Zeke Hausfather @hausfath.bsky.social · 1d
Renewables (primarily solar and wind) have grown dramatically over the past five years while other electricity sources have been relatively flat. Renewables are on track to generate more electricity than coal in 2025 (and already have over H1 of the year):
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Reposted by Dr. Nina Davtian (she/her/hers)
marbenavides.bsky.social
Mar Benavides @marbenavides.bsky.social · 1d
www.nature.com/articles/s41...
Meta-analysis shows that planting nitrogen-fixing species increases soil organic carbon stock - Nature Ecology & Evolution
This meta-analysis finds that planting nitrogen-fixing species increases soil carbon compared with non-nitrogen-fixing species. Using nitrogen-fixing species for forestation, agriculture and land regeneration might therefore offer a nature-based solution to mitigate climate change.
www.nature.com
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Reposted by Dr. Nina Davtian (she/her/hers)
The Keeling Curve @keelingcurve.bsky.social · 1d
424.09 parts per million (ppm) CO2 in air 06-Oct-2025
keelingcurve.ucsd.edu
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
keelingcurve.ucsd.edu
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Reposted by Dr. Nina Davtian (she/her/hers)
oceanandice.bsky.social
Prof Michael Meredith 🌊🧪🥼❄️ @oceanandice.bsky.social · 1d
🌊 PhD studentship alert! Study how glaciers create internal tsunamis beneath the ice.
Join a project with Newcastle Univ., BAS & SAMS — combining tank experiments + models to reveal how calving glaciers stir the ocean.
🔗 iapetus.ac.uk/studentships...
#PhD #Oceanography #Glaciology
Modelling internal tsunamis generated by glacial calving
iapetus.ac.uk
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Reposted by Dr. Nina Davtian (she/her/hers)
nagissa.bsky.social
Nagissa Mahmoudi @nagissa.bsky.social · 1d
Interested in life’s co-evolution with planetary environments?
🌎🦠🧪

I'm looking for a postdoc to join my group at #McGill and happy to sponsor applicants for the TSI fellowship.

Please reach out if interested!

academicjobsonline.org/ajo/jobs/30777
McGill University, Trottier Space Institute
Job #AJO30777, Trottier Space Institute Postdoctoral Fellow, Trottier Space Institute, McGill University, Montreal, Quebec, CA
academicjobsonline.org
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