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)
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!
Reposted by Dr. Nina Davtian (she/her/hers)
#OreCup is our first mini-Cup and our first collaboration. Give us feedback?
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 5:02 PM
#OreCup is our first mini-Cup and our first collaboration. Give us feedback?
Reposted by Dr. Nina Davtian (she/her/hers)
#OreCup finals are between a pair of bewitching ore minerals that glitter and gleam. But only one can have your vote.
Will it be native copper or molybdenite? You’re running out of time to choose!
Vote:
Will it be native copper or molybdenite? You’re running out of time to choose!
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 4:02 PM
#OreCup finals are between a pair of bewitching ore minerals that glitter and gleam. But only one can have your vote.
Will it be native copper or molybdenite? You’re running out of time to choose!
Vote:
Will it be native copper or molybdenite? You’re running out of time to choose!
Vote:
Reposted by Dr. Nina Davtian (she/her/hers)
Calm down Wales, calm down… Map shows the longest place names in Europe. HT @Maps_interlude
November 10, 2025 at 3:22 PM
Calm down Wales, calm down… Map shows the longest place names in Europe. HT @Maps_interlude
Reposted by Dr. Nina Davtian (she/her/hers)
Reposted by Dr. Nina Davtian (she/her/hers)
!New #OpenAcess paper alert!
Late Pleistocene atmospheric dust dynamics reconstructed from sediment included in ice wedges from #Batagay and Central Yakutia:
www.nature.com/articles/s41...
Late Pleistocene atmospheric dust dynamics reconstructed from sediment included in ice wedges from #Batagay and Central Yakutia:
www.nature.com/articles/s41...
East Siberian ice wedges recording dust transport variability during the Late Pleistocene - Nature Communications
Dust preserved in Siberian ice wedges reveals shifts in wind patterns during the last glacial stage. Long-range dust transport from China to the Arctic operated under similar mechanisms as today but w...
www.nature.com
November 10, 2025 at 1:07 PM
!New #OpenAcess paper alert!
Late Pleistocene atmospheric dust dynamics reconstructed from sediment included in ice wedges from #Batagay and Central Yakutia:
www.nature.com/articles/s41...
Late Pleistocene atmospheric dust dynamics reconstructed from sediment included in ice wedges from #Batagay and Central Yakutia:
www.nature.com/articles/s41...
Reposted by Dr. Nina Davtian (she/her/hers)
📣 We just released a new free resource at @climatecentral.org - a 72-slide deck introducing key facts about climate change, including its causes, impacts, and solutions. It also comes with speaker notes and links for local storytelling.
➡️ www.climatecentral.org/climate-matt... (English & Spanish)
➡️ www.climatecentral.org/climate-matt... (English & Spanish)
November 10, 2025 at 12:52 PM
📣 We just released a new free resource at @climatecentral.org - a 72-slide deck introducing key facts about climate change, including its causes, impacts, and solutions. It also comes with speaker notes and links for local storytelling.
➡️ www.climatecentral.org/climate-matt... (English & Spanish)
➡️ www.climatecentral.org/climate-matt... (English & Spanish)
Reposted by Dr. Nina Davtian (she/her/hers)
Nice contribution in @science.org Advances on the importance of reef ecosystems for biodiversity. Reefs were persistent hotspots of biodiversity throughout most of the Phanerozoic (last ~550 million years), it seems!
doi.org/10.1126/scia...
doi.org/10.1126/scia...
Reefal regions were biodiversity hotspots throughout the Phanerozoic
Geographic regions that support reefal environments have been key hotspots of marine animal diversity for over 400 million years.
doi.org
November 10, 2025 at 12:23 PM
Nice contribution in @science.org Advances on the importance of reef ecosystems for biodiversity. Reefs were persistent hotspots of biodiversity throughout most of the Phanerozoic (last ~550 million years), it seems!
doi.org/10.1126/scia...
doi.org/10.1126/scia...
Reposted by Dr. Nina Davtian (she/her/hers)
Freshwater Writing
How to handle freshwater fluxes from ice sheets in climate models, where there isn't an ice sheet model component? A new paper just out reveals all...
How to handle freshwater fluxes from ice sheets in climate models, where there isn't an ice sheet model component? A new paper just out reveals all...
Freshwater Writing
How to handle freshwater fluxes from ice sheets in climate models, where there isn't an ice sheet model component? A new paper just out reveals all...
sternaparadisaea.net
November 10, 2025 at 8:11 AM
Freshwater Writing
How to handle freshwater fluxes from ice sheets in climate models, where there isn't an ice sheet model component? A new paper just out reveals all...
How to handle freshwater fluxes from ice sheets in climate models, where there isn't an ice sheet model component? A new paper just out reveals all...
Reposted by Dr. Nina Davtian (she/her/hers)
We’re in the final stretch of #OreCup!
Native #Copper is an ore so integral to our history that we named several eras after it and its alloys
#Molybdenite spent centuries tricking us into thinking it was something else entirely
Vote:
Native #Copper is an ore so integral to our history that we named several eras after it and its alloys
#Molybdenite spent centuries tricking us into thinking it was something else entirely
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 12:01 PM
We’re in the final stretch of #OreCup!
Native #Copper is an ore so integral to our history that we named several eras after it and its alloys
#Molybdenite spent centuries tricking us into thinking it was something else entirely
Vote:
Native #Copper is an ore so integral to our history that we named several eras after it and its alloys
#Molybdenite spent centuries tricking us into thinking it was something else entirely
Vote:
Reposted by Dr. Nina Davtian (she/her/hers)
Reposted by Dr. Nina Davtian (she/her/hers)
🌟Congratulations to researchers Jun Borras, @estevecorbera.bsky.social, Ian Scoones & Anna Tsing on receiving an €8.33 million @erc.europa.eu Synergy Grant for #LAND project.
The project tackles a vital question: How can we learn to live on Earth in new ways?
+info ▶️ www.uab.cat/web/sala-de-...
The project tackles a vital question: How can we learn to live on Earth in new ways?
+info ▶️ www.uab.cat/web/sala-de-...
November 10, 2025 at 12:03 PM
🌟Congratulations to researchers Jun Borras, @estevecorbera.bsky.social, Ian Scoones & Anna Tsing on receiving an €8.33 million @erc.europa.eu Synergy Grant for #LAND project.
The project tackles a vital question: How can we learn to live on Earth in new ways?
+info ▶️ www.uab.cat/web/sala-de-...
The project tackles a vital question: How can we learn to live on Earth in new ways?
+info ▶️ www.uab.cat/web/sala-de-...
I think that this @natgeosci.nature.com paper—now published in the November issue of this journal—is worth checking out:
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
Earth system response to Heinrich events explained by a bipolar convection seesaw - Nature Geoscience
The onset of Southern Ocean convection following a slowing of the Atlantic Meridional Overturning Circulation during Heinrich events can help explain rapid CO2 increases and Antarctic warming during t...
doi.org
November 10, 2025 at 10:36 AM
I think that this @natgeosci.nature.com paper—now published in the November issue of this journal—is worth checking out:
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
doi.org/10.1038/s415...
🧪 ⚒️ 🦣 🌊
#PaleoSky
Reposted by Dr. Nina Davtian (she/her/hers)
⚒️ Article: The onset of Southern Ocean convection following a slowing of the Atlantic meridional overturning circulation during Heinrich Events can help explain rapid CO2 increases and Antarctic warming during these events
@pik-potsdam.bsky.social
www.nature.com/articles/s41...
@pik-potsdam.bsky.social
www.nature.com/articles/s41...
October 3, 2025 at 3:30 PM
⚒️ Article: The onset of Southern Ocean convection following a slowing of the Atlantic meridional overturning circulation during Heinrich Events can help explain rapid CO2 increases and Antarctic warming during these events
@pik-potsdam.bsky.social
www.nature.com/articles/s41...
@pik-potsdam.bsky.social
www.nature.com/articles/s41...
Reposted by Dr. Nina Davtian (she/her/hers)
⚒️ Article: Terrestrially-derived dissolved organic carbon is pervasive in the Arctic Ocean, especially within the Transpolar Drift current, and changing inputs could impact future marine carbon cycling
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Major terrestrial contribution to the dissolved organic carbon budget in the Arctic Ocean - Nature Geoscience
Terrestrially derived dissolved organic carbon is pervasive in the Arctic Ocean, especially within the Transpolar Drift current, and changing inputs could impact future marine carbon cycling, accordin...
www.nature.com
November 7, 2025 at 4:30 PM
⚒️ Article: Terrestrially-derived dissolved organic carbon is pervasive in the Arctic Ocean, especially within the Transpolar Drift current, and changing inputs could impact future marine carbon cycling
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Dr. Nina Davtian (she/her/hers)
⚒️ Article: Equatorial upwelling of phosphorus drives Atlantic N₂ fixation and 𝘚𝘢𝘳𝘨𝘢𝘴𝘴𝘶𝘮 blooms
@mpic.de
www.nature.com/articles/s41...
@mpic.de
www.nature.com/articles/s41...
Equatorial upwelling of phosphorus drives Atlantic N2 fixation and Sargassum blooms - Nature Geoscience
High near-surface nitrogen-fixation rates that promoted the recent growth of the Great Atlantic Sargassum Belt were tied to greater upwelling of phosphorus from the equatorial Atlantic, according to c...
www.nature.com
November 5, 2025 at 4:30 PM
⚒️ Article: Equatorial upwelling of phosphorus drives Atlantic N₂ fixation and 𝘚𝘢𝘳𝘨𝘢𝘴𝘴𝘶𝘮 blooms
@mpic.de
www.nature.com/articles/s41...
@mpic.de
www.nature.com/articles/s41...