The Version of Record of the new paper by Sai Ke et al. (2026) Organic Geochemistry is now online, so I re-up this paper too—with @arnaudhuguet.bsky.social as the last author! 👇🏻
#brGDGTs
#3OHFattyAcids
#TeamBacteria
🧪 ⚒️ 👩‍🔬
Implications for #PaleoSky

Mitigating edge effects in paleoclimate reconstructions: a comprehensive review and bias assessment of soil brGDGT-based temperature reconstructions Classical paleoclimate reconstructions rely on a space-for-time substitution approach, but past environmental conditions may extend beyond modern anal…

Here is a #TeamBacteria paper which reviews biases in continental temperature reconstructions based on branched tetraether lipids in soils and proposes an interesting constraint-based approach to improve such reconstructions:
www.sciencedirect.com/science/arti...
#brGDGTs
🧪 ⚒️ 👩‍🔬
#PaleoSky

Evaluation of bacterial membrane lipids (3-hydroxy fatty acids and branched GDGTs) as environmental proxies in lakes of the French Alps and southern Chile Revealing high-resolution paleoclimate records in lakes is essential for our understanding of the climate system. To date, the ubiquitous branched gly…

Second, this #TeamBacteria study led by Sai Ke:
www.sciencedirect.com/science/arti...
Involving two bacterial membrane lipid groups—3-hydroxy fatty acids and branched tetraether lipids—and last authored by @arnaudhuguet.bsky.social.
#IDWGS
#WomenInScienceDay
#brGDGTs
🧪 ⚒️ 👩‍🔬
(2/2)

Controls on brGDGT Production in the Seasonally Anoxic Water Column and Sediments of Rotsee (Lake Rot) MBT'5ME values in Rotsee are influenced by lake stratification while the isomer ratio (IR) more directly reflects epilimnion temperature MBT'5ME and IR are strongly correlated, providing a diagno...

Here is a paper led by a former PhD student and which further shows that indicators based on bacterial tetraether lipids in lakes consistently need refinement:
doi.org/10.1029/2025...
With @nemiahladd.bsky.social and @cindydejonge.bsky.social
#brGDGTs #TeamBacteria
🧪 ⚒️ 👩‍🔬
Implications for #PaleoSky

Global distribution of marine bacterial BrGDGTs in sediments: patterns and implications Branched glycerol dialkyl glycerol tetraethers (brGDGTs), originally linked to terrestrial bacteria for paleoenvironmental reconstructions, are now al…

Once again, marine tetraether lipids also include bacterial #brGDGTs!
See, for instance, this new marine brGDGT paper by @drxiaowj.bsky.social et al., just published in Geochimica et Cosmochimica Acta:
www.sciencedirect.com/science/arti...
#GDGTs #TeamBacteria
🧪 ⚒️ 🌊
With implications for #PaleoSky

Congrats to @aecpaleo.bsky.social on her new first authored paper, just published in @egubg.bsky.social!
doi.org/10.5194/bg-2...
With @cindydejonge.bsky.social and @sebjoannin.bsky.social.
Please also check out @sebjoannin.bsky.social’s post! 👇🏻
#brGDGTs #TeamBacteria
@egu.eu
🧪 ⚒️ 🦣 👩‍🔬
#PaleoSky

Divergent environmental controls on branched tetraethers along precipitation gradients in soils of the Tibetan Plateau Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are widely used for terrestrial paleotemperature reconstructions, yet their environmental con…

Yanwu Duan is the first author of two new papers which collectively support both #TeamBacteria and #TeamArchaea from the #GDGTs perspective.
Bacterial lipids #brGDGTs paper:
www.sciencedirect.com/science/arti...
Archaeal lipids #isoGDGTs paper:
www.sciencedirect.com/science/arti...
🧪 ⚒️
#PaleoSky

Boosted Regression Trees Machine Learning Method Improves the brGDGT‐Based Climate Reconstruction in Drylands Machine Learning methods reduce confounding effects and error in Branched glycerol dialkyl glycerol tetraether climate calibrations Boosted Regression Trees yields better results than Random Fore...

To all #TeamBacteria and team #brGDGTs members:
L. Dugerdil et al. (2025) PALO @agu.org have a new paper!
doi.org/10.1029/2025...
With @sebjoannin.bsky.social and @aecpaleo.bsky.social.
Also with my former PhD co-supervisor G. Ménot, who helped me to join team #GDGTs.
🧪 ⚒️ 🦣
#PaleoSky

How to use bacterial membrane lipids, named #brGDGTs, for reliable paleo-temperature reconstructions from Quaternary lake sediments?
The new paper quoted below further addresses this important question! 👇🏻
Congrats @geochemem.bsky.social and co-authors!
#GDGTs #TeamBacteria
🧪 ⚒️ 🦣 👩‍🔬
#PaleoSky

Utilizing Probability Estimates from Machine Learning and Pollen to Understand the Depositional Influences on Branched GDGT in Wetlands, Peatlands, and Lakes Abstract. Branched glycerol dialkyl glycerol tetraethers (brGDGTs) serve as critical molecular biomarkers for the quantitative reconstruction of past environments, ambient temperature and pH across va...

On this #InternationalWomensDay, let me highlight two 👩‍🔬.
First, @aecpaleo.bsky.social, who leads the following @egu.eu preprint:
egusphere.copernicus.org/preprints/20...
With @cindydejonge.bsky.social among other 👩‍🔬 co-authors.
#GDGTs #brGDGTs #TeamBacteria
🧪 ⚒️ 🦣
#PaleoSky
#IWD #IWD25 #IWD2025
(1/4)

Towards quantitative reconstruction of past monsoon precipitation based on tetraether membrane lipids in Chinese loess Abstract. Variations in the oxygen isotope composition (δ18O) of cave speleothems and numerous proxy records from loess–paleosol sequences have revealed past variations in East Asian monsoon (EAM) int...

On this #InternationalDayOfWomenAndGirlsInScience, here is a great story presented in two papers led by a 👩‍🔬 (Jingjing Guo) and last authored by another 👩‍🔬 (Francien Peterse).
Paper #1: doi.org/10.5194/cp-2...
Paper #2: doi.org/10.1016/j.or...
🧪 ⚒️ 🦣 👩‍🔬
#PaleoSky
#GDGTs #brGDGTs
#IDWGS #IDWGS2025

Terrestrial evidence for volcanogenic sulfate-driven cooling event ~30 kyr before the Cretaceous–Paleogene mass extinction Terrestrial proxy evidence for sulfur-induced cooling event linked to Deccan Trap eruptions 30 ka before K–Pg boundary.

Bacterial tetraether lipids as paleothermometers once again! #brGDGTs

Lauren O’Connor et al. (2024) Science Advances, with @docsabine.bsky.social:
doi.org/10.1126/scia...

🧪 ⚒️ 👩‍🔬
#PaleoSky

Nina Davtian (that's me!) at her work office, with the laptop screen showing the header of her co-authored article by De Jonge et al. (2024) GGG (https://doi.org/10.1029/2024GC011583) and her index finger showing where her name appears in the author list.

I am so glad to be one of the two ICTA-UAB representants—the other is Joan Villanueva—for the interlaboratory study led by @cindydejonge.bsky.social and @francien.bsky.social! #GDGTs #brGDGTs
Let's summarize this important study for #PaleoSky and ⚒️ people with the following thread! 👇🏻 (1/7)
🧪 👩‍🔬