Dr. Nina Davtian (she/her/hers)
@ninadavtian.bsky.social
@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
🇫🇷 -> 🇪🇸 -> 🇫🇷
Using biomarkers to study climate, ocean, and environment of the past.
@icta-uab.bsky.social alumna.
ORCID: https://orcid.org/0000-0002-3047-6064
🇫🇷 -> 🇪🇸 -> 🇫🇷
Pinned
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)
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)
Reposted by Dr. Nina Davtian (she/her/hers)
Arctic sea-ice extent just passed the border into the "record-low" domain.
Same for Barents, Baffin, Hudson, and Svalbard regions.
Second-lowest globally.
🌊❄️🥼🧪📉
Same for Barents, Baffin, Hudson, and Svalbard regions.
Second-lowest globally.
🌊❄️🥼🧪📉
November 27, 2025 at 11:59 AM
Arctic sea-ice extent just passed the border into the "record-low" domain.
Same for Barents, Baffin, Hudson, and Svalbard regions.
Second-lowest globally.
🌊❄️🥼🧪📉
Same for Barents, Baffin, Hudson, and Svalbard regions.
Second-lowest globally.
🌊❄️🥼🧪📉
Reposted by Dr. Nina Davtian (she/her/hers)
International environmental treaties cannot be reformed through rational design
doi.org/10.1038/d415...
doi.org/10.1038/d415...
International environmental treaties cannot be reformed through rational design
Letter to the Editor
doi.org
November 27, 2025 at 12:09 PM
International environmental treaties cannot be reformed through rational design
doi.org/10.1038/d415...
doi.org/10.1038/d415...
Reposted by Dr. Nina Davtian (she/her/hers)
World leaders must find the courage to end the fossil-fuel age www.nature.com/articles/d41...
World leaders must find the courage to end the fossil-fuel age
Despite the weak agreement seen at the COP30 climate conference, Brazil was right to prioritize discussing the eventual phase-out of fossil fuels. Others must now help to find a way forward.
www.nature.com
November 27, 2025 at 12:03 PM
World leaders must find the courage to end the fossil-fuel age www.nature.com/articles/d41...
Reposted by Dr. Nina Davtian (she/her/hers)
ICTA-UAB researcher Victoria Reyes-García receives the Rei Jaume I Award
"The care of nature is not the exclusive domain of environmental scientists; it belongs to society as a whol & there are contributions not only from the Western perspective but from other cultures”
www.uab.cat/web/sala-de-...
"The care of nature is not the exclusive domain of environmental scientists; it belongs to society as a whol & there are contributions not only from the Western perspective but from other cultures”
www.uab.cat/web/sala-de-...
November 27, 2025 at 11:33 AM
ICTA-UAB researcher Victoria Reyes-García receives the Rei Jaume I Award
"The care of nature is not the exclusive domain of environmental scientists; it belongs to society as a whol & there are contributions not only from the Western perspective but from other cultures”
www.uab.cat/web/sala-de-...
"The care of nature is not the exclusive domain of environmental scientists; it belongs to society as a whol & there are contributions not only from the Western perspective but from other cultures”
www.uab.cat/web/sala-de-...
Reposted by Dr. Nina Davtian (she/her/hers)
You can follow updates here:
www.beyondepica.eu/en/campaigns...
www.beyondepica.eu/en/campaigns...
26 November
www.beyondepica.eu
November 27, 2025 at 10:30 AM
You can follow updates here:
www.beyondepica.eu/en/campaigns...
www.beyondepica.eu/en/campaigns...
Reposted by Dr. Nina Davtian (she/her/hers)
Field update from Beyond EPICA:
"The camera's light reflected off the myriad of fine ice particulates suspended in the fluid, causing flashes of light and colour that danced and reformed, giving the impression of travelling through a cosmic kaleidoscope"
in other words...
youtu.be/ozhR9fxe1oU?...
"The camera's light reflected off the myriad of fine ice particulates suspended in the fluid, causing flashes of light and colour that danced and reformed, giving the impression of travelling through a cosmic kaleidoscope"
in other words...
youtu.be/ozhR9fxe1oU?...
DOUBLE RAINBOW OH MY GOD! 2001 EDITION!
YouTube video by Disasteradio
youtu.be
November 27, 2025 at 10:30 AM
Field update from Beyond EPICA:
"The camera's light reflected off the myriad of fine ice particulates suspended in the fluid, causing flashes of light and colour that danced and reformed, giving the impression of travelling through a cosmic kaleidoscope"
in other words...
youtu.be/ozhR9fxe1oU?...
"The camera's light reflected off the myriad of fine ice particulates suspended in the fluid, causing flashes of light and colour that danced and reformed, giving the impression of travelling through a cosmic kaleidoscope"
in other words...
youtu.be/ozhR9fxe1oU?...
Reposted by Dr. Nina Davtian (she/her/hers)
Bringing @imbrace-erc.bsky.social to this conference, inserting issues of social justice to discussions of #OneHealth and #PlanetaryHealth
📢 Save the date: ERC annual conference will take place on 28 January 2026! Its theme will be ‘One Health’.
Discover the programme and register now 👉 t.co/SBat1iYccr
#OneHealth
@scienceinnovation.ec.europa.eu @ecdc.europa.eu @efsa.europa.eu
Discover the programme and register now 👉 t.co/SBat1iYccr
#OneHealth
@scienceinnovation.ec.europa.eu @ecdc.europa.eu @efsa.europa.eu
November 27, 2025 at 10:21 AM
Bringing @imbrace-erc.bsky.social to this conference, inserting issues of social justice to discussions of #OneHealth and #PlanetaryHealth
Reposted by Dr. Nina Davtian (she/her/hers)
Et pour avoir un avant goût de ce que vous apprendrez, lisez
www.insu.cnrs.fr/fr/datation-...
www.insu.cnrs.fr/fr/datation-...
November 27, 2025 at 9:35 AM
Et pour avoir un avant goût de ce que vous apprendrez, lisez
www.insu.cnrs.fr/fr/datation-...
www.insu.cnrs.fr/fr/datation-...
Reposted by Dr. Nina Davtian (she/her/hers)
#Enseignants #SVT
Envie d'en savoir plus sur la datation des roches et des fossiles pour vos cours de #Terminale ?
Le CNRS vous propose un webinaire avec le paléontologue Abder El Albani le 03/12 à 18h
Déjà plus de 300 inscrits !
ℹ️ Infos et inscriptions
anneedesgeosciences.cnrs.fr/evenement/we...
Envie d'en savoir plus sur la datation des roches et des fossiles pour vos cours de #Terminale ?
Le CNRS vous propose un webinaire avec le paléontologue Abder El Albani le 03/12 à 18h
Déjà plus de 300 inscrits !
ℹ️ Infos et inscriptions
anneedesgeosciences.cnrs.fr/evenement/we...
November 27, 2025 at 9:33 AM
#Enseignants #SVT
Envie d'en savoir plus sur la datation des roches et des fossiles pour vos cours de #Terminale ?
Le CNRS vous propose un webinaire avec le paléontologue Abder El Albani le 03/12 à 18h
Déjà plus de 300 inscrits !
ℹ️ Infos et inscriptions
anneedesgeosciences.cnrs.fr/evenement/we...
Envie d'en savoir plus sur la datation des roches et des fossiles pour vos cours de #Terminale ?
Le CNRS vous propose un webinaire avec le paléontologue Abder El Albani le 03/12 à 18h
Déjà plus de 300 inscrits !
ℹ️ Infos et inscriptions
anneedesgeosciences.cnrs.fr/evenement/we...
Reposted by Dr. Nina Davtian (she/her/hers)
Most R scripts look like we’ve been operating with boxing gloves on. 🥊
What if you wrote code like a surgeon instead — small, precise, deliberate changes that actually fix the problem?
That’s the mindset behind “Code like a surgeon”. 🧵⬇️
What if you wrote code like a surgeon instead — small, precise, deliberate changes that actually fix the problem?
That’s the mindset behind “Code like a surgeon”. 🧵⬇️
November 27, 2025 at 9:04 AM
Most R scripts look like we’ve been operating with boxing gloves on. 🥊
What if you wrote code like a surgeon instead — small, precise, deliberate changes that actually fix the problem?
That’s the mindset behind “Code like a surgeon”. 🧵⬇️
What if you wrote code like a surgeon instead — small, precise, deliberate changes that actually fix the problem?
That’s the mindset behind “Code like a surgeon”. 🧵⬇️
Reposted by Dr. Nina Davtian (she/her/hers)
Présentes dans nos smartphones 🤳, ampoules LED 💡 ou batteries électriques 🔋, les terres rares sont des métaux très convoités. Le géochimiste Clément Levard (CNRS) résume 3 points clés pour comprendre pourquoi leur approvisionnement est un enjeu majeur.
Trois choses à savoir sur les terres rares
Présentes dans de multiples objets du quotidien, comme les smartphones mais aussi les ampoules LED, les batteries électriques ou les éoliennes, les terres rar
www.cnrs.fr
November 27, 2025 at 8:39 AM
Présentes dans nos smartphones 🤳, ampoules LED 💡 ou batteries électriques 🔋, les terres rares sont des métaux très convoités. Le géochimiste Clément Levard (CNRS) résume 3 points clés pour comprendre pourquoi leur approvisionnement est un enjeu majeur.
Reposted by Dr. Nina Davtian (she/her/hers)
As weird as it may sound, the amount of organic matter produced by photosynthesis at the sea surface isn't enough to support the communities at the lightless depths. Dark inorganic carbon fixation (chemoautotrophy) fills just over a third of that gap. 🧪🌊
Link: os.copernicus.org/articles/21/...
Link: os.copernicus.org/articles/21/...
November 22, 2025 at 3:21 PM
As weird as it may sound, the amount of organic matter produced by photosynthesis at the sea surface isn't enough to support the communities at the lightless depths. Dark inorganic carbon fixation (chemoautotrophy) fills just over a third of that gap. 🧪🌊
Link: os.copernicus.org/articles/21/...
Link: os.copernicus.org/articles/21/...
Reposted by Dr. Nina Davtian (she/her/hers)
"...chemoautotrophs have competitive advantages under nutrient-limited conditions due to their small size and ability to utilize both organic and inorganic nutrients."
A glimpse into the base of the foodwebs in a future oligotrophic/warm ocean. 🧪🌊
Link: www.sciencedirect.com/science/arti...
A glimpse into the base of the foodwebs in a future oligotrophic/warm ocean. 🧪🌊
Link: www.sciencedirect.com/science/arti...
November 27, 2025 at 6:56 AM
"...chemoautotrophs have competitive advantages under nutrient-limited conditions due to their small size and ability to utilize both organic and inorganic nutrients."
A glimpse into the base of the foodwebs in a future oligotrophic/warm ocean. 🧪🌊
Link: www.sciencedirect.com/science/arti...
A glimpse into the base of the foodwebs in a future oligotrophic/warm ocean. 🧪🌊
Link: www.sciencedirect.com/science/arti...
Reposted by Dr. Nina Davtian (she/her/hers)
🧪
A Shakespearean take on the excesses seen in certain geochemical species in the ocean ...
agupubs.onlinelibrary.wiley.com/doi/full/10....
A Shakespearean take on the excesses seen in certain geochemical species in the ocean ...
agupubs.onlinelibrary.wiley.com/doi/full/10....
To Ba or Not to Ba: Evaluating Water Column Excess Particulate Barium as a Proxy for Water Column Respiration
Barite formation in the mesopelagic zone appears to have a mechanistic relationship with organic C respiration rates Higher particulate excess Ba concentrations in the East Pacific than in the No...
agupubs.onlinelibrary.wiley.com
November 26, 2025 at 7:10 PM
🧪
A Shakespearean take on the excesses seen in certain geochemical species in the ocean ...
agupubs.onlinelibrary.wiley.com/doi/full/10....
A Shakespearean take on the excesses seen in certain geochemical species in the ocean ...
agupubs.onlinelibrary.wiley.com/doi/full/10....
Reposted by Dr. Nina Davtian (she/her/hers)
My piece in Forbes on how "climate change sounds" using really interesting convergence of data science, technology, climate science, and music. Data sonification is a thing, and you will learn about it in this piece.
www.forbes.com/sites/marsha...
www.forbes.com/sites/marsha...
How Climate Change Sounds Using Data Sonification
How data sonification allows people to "feel" and "experience" climate change through sound.
www.forbes.com
November 26, 2025 at 8:20 PM
My piece in Forbes on how "climate change sounds" using really interesting convergence of data science, technology, climate science, and music. Data sonification is a thing, and you will learn about it in this piece.
www.forbes.com/sites/marsha...
www.forbes.com/sites/marsha...
Reposted by Dr. Nina Davtian (she/her/hers)
Great opportunity here to study the Earth system during the often overlooked early Miocene. Application details here!
Applications for Participation in IODP3 Expedition 505S are now open!
Deadline January 23rd 2026 - lnkd.in/etiWvk2z
If you are a researcher/science communicator interested in contributing to understanding an enigma in the early Miocene Earth system then please consider applying this expedition!
Deadline January 23rd 2026 - lnkd.in/etiWvk2z
If you are a researcher/science communicator interested in contributing to understanding an enigma in the early Miocene Earth system then please consider applying this expedition!
November 27, 2025 at 12:23 AM
Great opportunity here to study the Earth system during the often overlooked early Miocene. Application details here!
Reposted by Dr. Nina Davtian (she/her/hers)
I have the first paper in my 2026 folder! Altyeb et al present a compilation of Last Interglacial (MIS 5e) sea level proxies along the Egyptian Coast of the Red Sea. It looks like the northern part of the coast is affected by tectonics. doi.org/10.1016/j.qu...
Redirecting
doi.org
November 27, 2025 at 4:47 AM
I have the first paper in my 2026 folder! Altyeb et al present a compilation of Last Interglacial (MIS 5e) sea level proxies along the Egyptian Coast of the Red Sea. It looks like the northern part of the coast is affected by tectonics. doi.org/10.1016/j.qu...
Reposted by Dr. Nina Davtian (she/her/hers)
With our season underway we're sharing Antarctic terms and phrases so that you too can #TalklikeanAntarctican! First up is: Going south - Travelling to Antarctica. Our drillers have already arrived in Antarctica, and the first of our on-ice scientists are going south today! 🎨 @icebirdstudio
November 27, 2025 at 5:12 AM
With our season underway we're sharing Antarctic terms and phrases so that you too can #TalklikeanAntarctican! First up is: Going south - Travelling to Antarctica. Our drillers have already arrived in Antarctica, and the first of our on-ice scientists are going south today! 🎨 @icebirdstudio
Reposted by Dr. Nina Davtian (she/her/hers)
🌊 Observed large-scale and deep-reaching compound ocean state changes over the past 60 years
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Observed large-scale and deep-reaching compound ocean state changes over the past 60 years - Nature Climate Change
It is important to understand the combined effects of multiple changes on the ocean. Here the authors use time of emergence to highlight the increases in impacts of individual and compound changes glo...
www.nature.com
November 27, 2025 at 5:39 AM
🌊 Observed large-scale and deep-reaching compound ocean state changes over the past 60 years
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Dr. Nina Davtian (she/her/hers)
Thanks to Fei Chai and Minhan Dai (Xiamen University) for their invitation to give a seminar on "Ocean science meets diplomacy" based of the links between the One Ocean Science Congress #OOSC and #UNOC3.
Further reading: aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
Further reading: aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
November 27, 2025 at 5:52 AM
Thanks to Fei Chai and Minhan Dai (Xiamen University) for their invitation to give a seminar on "Ocean science meets diplomacy" based of the links between the One Ocean Science Congress #OOSC and #UNOC3.
Further reading: aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
Further reading: aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Dr. Nina Davtian (she/her/hers)
Good morning! A stormy sunrise, raining with a big storm coming behind me.
Enjoy your 10 minutes of #OceanDevotion peace & calm here: youtu.be/BmD0R3IpOLE?...
Enjoy your 10 minutes of #OceanDevotion peace & calm here: youtu.be/BmD0R3IpOLE?...
November 26, 2025 at 9:25 PM
Good morning! A stormy sunrise, raining with a big storm coming behind me.
Enjoy your 10 minutes of #OceanDevotion peace & calm here: youtu.be/BmD0R3IpOLE?...
Enjoy your 10 minutes of #OceanDevotion peace & calm here: youtu.be/BmD0R3IpOLE?...
Reposted by Dr. Nina Davtian (she/her/hers)
In geology, if something doesn't show activity for 15 thousands of years, this doesn't meat it isn't active. Even million years of no signs of activity doesn't mean the system is dead.
🧪⚒️
🧪⚒️
Here's the GVP page of Hayli Gubbi in Ethiopia: volcano.si.edu/volcano.cfm?.... Plume from the eruption can be seen in this Aqua/MODIS image cross the Red Sea to the Arabian Peninsula. #eruption #volcano
November 23, 2025 at 9:00 PM
In geology, if something doesn't show activity for 15 thousands of years, this doesn't meat it isn't active. Even million years of no signs of activity doesn't mean the system is dead.
🧪⚒️
🧪⚒️
Reposted by Dr. Nina Davtian (she/her/hers)
Sea surface temperatures are rising around the perimeter of the #Arctic Ocean in November. Long-term trends ➡️ decreasing ice and warming atmosphere+ocean
[For more information: doi.org/10.25923/9z9.... Data from NOAA OISSTv2.1]
[For more information: doi.org/10.25923/9z9.... Data from NOAA OISSTv2.1]
November 26, 2025 at 9:06 PM
Sea surface temperatures are rising around the perimeter of the #Arctic Ocean in November. Long-term trends ➡️ decreasing ice and warming atmosphere+ocean
[For more information: doi.org/10.25923/9z9.... Data from NOAA OISSTv2.1]
[For more information: doi.org/10.25923/9z9.... Data from NOAA OISSTv2.1]
Reposted by Dr. Nina Davtian (she/her/hers)
Big shoutout to @geodatarankings for showing us this basic geography trivia in map form: what countries are home to 100+ people?
November 26, 2025 at 8:42 PM
Big shoutout to @geodatarankings for showing us this basic geography trivia in map form: what countries are home to 100+ people?
Reposted by Dr. Nina Davtian (she/her/hers)
#Communiqué 🗞️ Pour sa 4ème édition, les médailles de la médiation scientifique du @cnrs.fr et de @franceuniversites.bsky.social distinguent 4 projets qui, par leur créativité et leur engagement, contribuent à nourrir le dialogue entre la science et la société.
👉 www.cnrs.fr/fr/presse/le...
👉 www.cnrs.fr/fr/presse/le...
November 26, 2025 at 7:30 PM
#Communiqué 🗞️ Pour sa 4ème édition, les médailles de la médiation scientifique du @cnrs.fr et de @franceuniversites.bsky.social distinguent 4 projets qui, par leur créativité et leur engagement, contribuent à nourrir le dialogue entre la science et la société.
👉 www.cnrs.fr/fr/presse/le...
👉 www.cnrs.fr/fr/presse/le...