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)
🌍 Exciting news for #Paleoscience ECRs!
The PAGES ECN Discord server is now live, a global space to connect, collaborate, and exchange ideas with fellow early-career researchers.
💬 Discuss science
🤝 Build collaborations
📝 Join community activities
Join here: discord.gg/TmpknycWa4
#PAGES #ECR
The PAGES ECN Discord server is now live, a global space to connect, collaborate, and exchange ideas with fellow early-career researchers.
💬 Discuss science
🤝 Build collaborations
📝 Join community activities
Join here: discord.gg/TmpknycWa4
#PAGES #ECR
Join the PAGES Early-Career Network Discord Server!
Check out the PAGES Early-Career Network community on Discord - hang out with 21 other members and enjoy free voice and text chat.
discord.gg
November 11, 2025 at 4:11 PM
🌍 Exciting news for #Paleoscience ECRs!
The PAGES ECN Discord server is now live, a global space to connect, collaborate, and exchange ideas with fellow early-career researchers.
💬 Discuss science
🤝 Build collaborations
📝 Join community activities
Join here: discord.gg/TmpknycWa4
#PAGES #ECR
The PAGES ECN Discord server is now live, a global space to connect, collaborate, and exchange ideas with fellow early-career researchers.
💬 Discuss science
🤝 Build collaborations
📝 Join community activities
Join here: discord.gg/TmpknycWa4
#PAGES #ECR
Reposted by Dr. Nina Davtian (she/her/hers)
Climate indicators - Ocean heat content
November 11, 2025 at 3:56 PM
Climate indicators - Ocean heat content
Reposted by Dr. Nina Davtian (she/her/hers)
Climate indicators - Arctic sea ice extent
November 11, 2025 at 3:56 PM
Climate indicators - Arctic sea ice extent
Reposted by Dr. Nina Davtian (she/her/hers)
Climate indicators - Carbon dioxide
November 11, 2025 at 3:56 PM
Climate indicators - Carbon dioxide
Reposted by Dr. Nina Davtian (she/her/hers)
Climate indicators - Global mean temperature
November 11, 2025 at 3:56 PM
Climate indicators - Global mean temperature
Reposted by Dr. Nina Davtian (she/her/hers)
Last month was the 4th warmest October on record for the average global sea surface temperature... 🌊
Graphic using NOAA ERSSTv5 data. Methods described in doi.org/10.1175/JCLI....
Graphic using NOAA ERSSTv5 data. Methods described in doi.org/10.1175/JCLI....
November 11, 2025 at 2:31 PM
Last month was the 4th warmest October on record for the average global sea surface temperature... 🌊
Graphic using NOAA ERSSTv5 data. Methods described in doi.org/10.1175/JCLI....
Graphic using NOAA ERSSTv5 data. Methods described in doi.org/10.1175/JCLI....
Reposted by Dr. Nina Davtian (she/her/hers)
Project 3: Comparing biomineralisation mechanisms in marine calcifying organisms to understand their resilience. In this project the student will use micro-electrode observations to reveal the mechanisms of calcification in open water calcifiers (coccolithophores and foraminifera).
Comparing biomineralisation mechanisms in marine calcifying organisms to understand their resilience to global change at University of Southampton on FindAPhD.com
PhD Project - Comparing biomineralisation mechanisms in marine calcifying organisms to understand their resilience to global change at University of Southampton, listed on FindAPhD.com
www.findaphd.com
November 11, 2025 at 1:53 PM
Project 3: Comparing biomineralisation mechanisms in marine calcifying organisms to understand their resilience. In this project the student will use micro-electrode observations to reveal the mechanisms of calcification in open water calcifiers (coccolithophores and foraminifera).
Reposted by Dr. Nina Davtian (she/her/hers)
Project 2: Towards a less negative future for coral reefs: An anion perspective on coral calcification. In this project we will improve our understanding of how corals calcify by developing new skeletal tracers of the chemistry of the calcifying fluid www.findaphd.com/phds/project...
Towards a less negative future for coral reefs: An anion perspective on coral calcification at University of Southampton on FindAPhD.com
PhD Project - Towards a less negative future for coral reefs: An anion perspective on coral calcification at University of Southampton, listed on FindAPhD.com
www.findaphd.com
November 11, 2025 at 1:53 PM
Project 2: Towards a less negative future for coral reefs: An anion perspective on coral calcification. In this project we will improve our understanding of how corals calcify by developing new skeletal tracers of the chemistry of the calcifying fluid www.findaphd.com/phds/project...
Reposted by Dr. Nina Davtian (she/her/hers)
Project 1: Is the world already 1.5 C warmer? Insights into pre-industrial climate from corals. The aim here is to use the chemical composition of coral skeletons to reconstruct tropical temperature change over the last 250 years to improve our understanding of pre-industrial temperature.
Is the world already 1.5 oC warmer? Insights into pre-industrial climate from corals at University of Southampton on FindAPhD.com
PhD Project - Is the world already 1.5 oC warmer? Insights into pre-industrial climate from corals at University of Southampton, listed on FindAPhD.com
www.findaphd.com
November 11, 2025 at 1:53 PM
Project 1: Is the world already 1.5 C warmer? Insights into pre-industrial climate from corals. The aim here is to use the chemical composition of coral skeletons to reconstruct tropical temperature change over the last 250 years to improve our understanding of pre-industrial temperature.
Reposted by Dr. Nina Davtian (she/her/hers)
Fully funded PhD projects available in my group (Please share with interested parties, details here: www.thefosterlab.org/blog/2025/11...):
PhD Topics - Entry September 2026 — The Foster Lab
This year we are involved in 3 fully funded PhD projects via IGNITE our NERC DLA. The deadline is Thursday Jan 8th 2026 . 1. Is the world already 1.5 C warmer?...
www.thefosterlab.org
November 11, 2025 at 1:46 PM
Fully funded PhD projects available in my group (Please share with interested parties, details here: www.thefosterlab.org/blog/2025/11...):
Reposted by Dr. Nina Davtian (she/her/hers)
#EGU are very pleased to announce the 52 recipients of the 2026 Union #Medals and #Awards, Division Medals, and Division Outstanding Early Career Scientist Awards.
Winners are honoured for their important contributions to Earth, planetary and space sciences: https://www.egu.eu/5SIDGO/
Winners are honoured for their important contributions to Earth, planetary and space sciences: https://www.egu.eu/5SIDGO/
November 11, 2025 at 11:01 AM
#EGU are very pleased to announce the 52 recipients of the 2026 Union #Medals and #Awards, Division Medals, and Division Outstanding Early Career Scientist Awards.
Winners are honoured for their important contributions to Earth, planetary and space sciences: https://www.egu.eu/5SIDGO/
Winners are honoured for their important contributions to Earth, planetary and space sciences: https://www.egu.eu/5SIDGO/
Reposted by Dr. Nina Davtian (she/her/hers)
A particular interest of mine has been how Earth system processes, including terrestrial methane cycling, have been perturbed by past warming events. Our new paper, led by Wuhan colleagues, is another contribution to that understanding!
pubs.geoscienceworld.org/gsa/geology/...
pubs.geoscienceworld.org/gsa/geology/...
November 11, 2025 at 10:19 AM
A particular interest of mine has been how Earth system processes, including terrestrial methane cycling, have been perturbed by past warming events. Our new paper, led by Wuhan colleagues, is another contribution to that understanding!
pubs.geoscienceworld.org/gsa/geology/...
pubs.geoscienceworld.org/gsa/geology/...
Reposted by Dr. Nina Davtian (she/her/hers)
Monthly climate dashboard
Now with all global temperature datasets updated to September or October.
www.jkclimate.fr/MonthlyDashb...
Now with all global temperature datasets updated to September or October.
www.jkclimate.fr/MonthlyDashb...
November 11, 2025 at 8:50 AM
Monthly climate dashboard
Now with all global temperature datasets updated to September or October.
www.jkclimate.fr/MonthlyDashb...
Now with all global temperature datasets updated to September or October.
www.jkclimate.fr/MonthlyDashb...
Reposted by Dr. Nina Davtian (she/her/hers)
The #Python and #MATLAB Recipes for Earth Sciences books are back in the top 100 at Springer Earth and Environment, the last two editions each. Thank you all for continuing to buy the books, even though they can usually be downloaded from university libraries!
www.springernature.com/de/bookselle...
www.springernature.com/de/bookselle...
November 11, 2025 at 8:00 AM
The #Python and #MATLAB Recipes for Earth Sciences books are back in the top 100 at Springer Earth and Environment, the last two editions each. Thank you all for continuing to buy the books, even though they can usually be downloaded from university libraries!
www.springernature.com/de/bookselle...
www.springernature.com/de/bookselle...
Reposted by Dr. Nina Davtian (she/her/hers)
This is great news: www.theguardian.com/world/2025/n.... Not least because it removes one of the common denialist retorts “what’s the point if China aren’t doing it” - they clearly are and so should we
China’s CO2 emissions have been flat or falling for past 18 months, analysis finds
World’s biggest polluter on track to hit peak emissions target early but miss goal for cutting carbon intensity
www.theguardian.com
November 11, 2025 at 7:00 AM
This is great news: www.theguardian.com/world/2025/n.... Not least because it removes one of the common denialist retorts “what’s the point if China aren’t doing it” - they clearly are and so should we
Reposted by Dr. Nina Davtian (she/her/hers)
People who post long threads: you might want to consider making it clear what the hell/who the hell you're talking about when you make a key point so if it's retweeted a coherent version of your message gets out.
November 10, 2025 at 11:46 PM
People who post long threads: you might want to consider making it clear what the hell/who the hell you're talking about when you make a key point so if it's retweeted a coherent version of your message gets out.
Reposted by Dr. Nina Davtian (she/her/hers)
Impossible to ignore what’s happening to #Arctic temperatures in the month of November...
Data from @copernicusecmwf.bsky.social ERA5 reanalysis.
Data from @copernicusecmwf.bsky.social ERA5 reanalysis.
November 11, 2025 at 12:10 AM
Impossible to ignore what’s happening to #Arctic temperatures in the month of November...
Data from @copernicusecmwf.bsky.social ERA5 reanalysis.
Data from @copernicusecmwf.bsky.social ERA5 reanalysis.
Reposted by Dr. Nina Davtian (she/her/hers)
My new video…
Unexpected Outgassing of C02 in Southern Ocean means Carbon Sink is LESS than We Thought…
youtu.be/mJecOCumlds?...
#climate #ClimateCrisis #ClimateTech #GHG #oceans #Antarctica #CO2
Unexpected Outgassing of C02 in Southern Ocean means Carbon Sink is LESS than We Thought…
youtu.be/mJecOCumlds?...
#climate #ClimateCrisis #ClimateTech #GHG #oceans #Antarctica #CO2
Unexpected Outgassing of C02 in Southern Ocean means Carbon Sink is LESS than we Thought…
YouTube video by Paul Beckwith
youtu.be
November 11, 2025 at 3:03 AM
My new video…
Unexpected Outgassing of C02 in Southern Ocean means Carbon Sink is LESS than We Thought…
youtu.be/mJecOCumlds?...
#climate #ClimateCrisis #ClimateTech #GHG #oceans #Antarctica #CO2
Unexpected Outgassing of C02 in Southern Ocean means Carbon Sink is LESS than We Thought…
youtu.be/mJecOCumlds?...
#climate #ClimateCrisis #ClimateTech #GHG #oceans #Antarctica #CO2
Reposted by Dr. Nina Davtian (she/her/hers)
JGR–Oceans is seeking Editors and Associate Editors across all areas of ocean science—with particular interest in expertise related to Lagrangian dynamics, ocean color remote sensing, air–sea coupling, sea level, circulation theory, and ocean change. Join us in shaping the future of ocean research!
Ask not what your journal can do for you—ask what you can do for your journal 🌊
JGR:Oceans is now looking for new Editors and Associate Editors, if you're interested get in touch. We don't bite! 😀
JGR:Oceans is now looking for new Editors and Associate Editors, if you're interested get in touch. We don't bite! 😀
November 11, 2025 at 3:10 AM
JGR–Oceans is seeking Editors and Associate Editors across all areas of ocean science—with particular interest in expertise related to Lagrangian dynamics, ocean color remote sensing, air–sea coupling, sea level, circulation theory, and ocean change. Join us in shaping the future of ocean research!
Reposted by Dr. Nina Davtian (she/her/hers)
It's #PalaeoPercs day! Join us at 1000 UTC to learn more about stromatolites and research opportunities in China with Viplove Rajurkar from Tongji University, China!
November 11, 2025 at 5:20 AM
It's #PalaeoPercs day! Join us at 1000 UTC to learn more about stromatolites and research opportunities in China with Viplove Rajurkar from Tongji University, China!
Reposted by Dr. Nina Davtian (she/her/hers)
It’s the final hours of #OreCup. Did you vote?
Vote in Ore Cup FINALS — Mineral Cup & Ore Cup
Pick the Ore Mineral of the Year! Voting for Copper vs Molybdenite will remain open for 48 hours. Credit: David M. Maietta and Harold Moritz
www.mineralcup.org
November 10, 2025 at 8:01 PM
It’s the final hours of #OreCup. Did you vote?
Reposted by Dr. Nina Davtian (she/her/hers)
A journey into the sensory world of ancient Arabia: incense, ritual, trade, memory & scent 🌿🔥🏺🧪
www.dainst.org/en/newsroom/...
www.dainst.org/en/newsroom/...
DAI - Scents of Arabia
www.dainst.org
November 10, 2025 at 7:45 PM
A journey into the sensory world of ancient Arabia: incense, ritual, trade, memory & scent 🌿🔥🏺🧪
www.dainst.org/en/newsroom/...
www.dainst.org/en/newsroom/...
Reposted by Dr. Nina Davtian (she/her/hers)
Here is a map view of the record high temperatures in October 2025 across the #Antarctic. Compare this blob of anomalies greater than 5°C with the Arctic from my earlier post. Yikes!
Data from doi.org/10.24381/cds... using a 1981-2010 reference period.
Data from doi.org/10.24381/cds... using a 1981-2010 reference period.
November 10, 2025 at 5:56 PM
Here is a map view of the record high temperatures in October 2025 across the #Antarctic. Compare this blob of anomalies greater than 5°C with the Arctic from my earlier post. Yikes!
Data from doi.org/10.24381/cds... using a 1981-2010 reference period.
Data from doi.org/10.24381/cds... using a 1981-2010 reference period.
Reposted by Dr. Nina Davtian (she/her/hers)
Baseline reading not available, data too variable 09-Nov-2025
keelingcurve.ucsd.edu
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
November 10, 2025 at 5:51 PM
Baseline reading not available, data too variable 09-Nov-2025
keelingcurve.ucsd.edu
keelingcurve.ucsd.edu
Reposted by Dr. Nina Davtian (she/her/hers)
Remember that the #OreCup final match between #Copper and #Molybdenite is running an extra-long 48 hours to catch weekday voters.
Twiddling your thumbs waiting? Give us feedback on our first mini-cup!
Twiddling your thumbs waiting? Give us feedback on our first mini-cup!
Ore Cup Players Survey — Mineral Cup & Ore Cup
This is our first Ore Cup, our first week-long mini-cup, and our first collaboration with the International Mineralogical Association. We’d love to get your feedback on what worked, what didn’t, and…
www.mineralcup.org
November 10, 2025 at 5:15 PM
Remember that the #OreCup final match between #Copper and #Molybdenite is running an extra-long 48 hours to catch weekday voters.
Twiddling your thumbs waiting? Give us feedback on our first mini-cup!
Twiddling your thumbs waiting? Give us feedback on our first mini-cup!