Assessing the reliability of isoGDGTs lake-level proxies across Tibetan Plateau and Central Asian lakes Quantitative reconstruction of past lake-level changes remains challenging because robust hydrological proxies are scarce and many existing indicators…

Across Tibetan Plateau and Central Asian lakes, #TeamArchaea tetraether lipids are commonly used as lake-level proxies, but such hydrological proxies have shortcomings too, which motivates this new paper by J. Shang et al. (2026):
www.sciencedirect.com/science/arti...
#GDGTs #isoGDGTs
🧪 ⚒️
#PaleoSky

Second, I know that one day, we would know what #TeamArchaea hydroxylated tetraether lipids are capable of in the Southern Ocean—not just within the Antarctic Zone—and someone recently achieved a step toward this goal.
I will post more details on this soon!
(2/2)
#GDGTs
#isoGDGTs
🧪 ⚒️ 🌊 👩‍🔬
#PaleoSky

Here are @antarcticabella.bsky.social’s words about her new last-authored paper. 👇🏻
BTW why did I highlight the need for #TeamArchaea hydroxylated tetraether lipids to improve paleothermometry from #isoGDGTs?
First, Ishii et al. agree with this research direction!
(1/2)
#GDGTs
🧪 ⚒️ 🌊 👩‍🔬
#PaleoSky

New isoprenoid GDGT index as a water mass and temperature proxy in the Southern Ocean Abstract. The Southern Ocean plays a crucial role in the global carbon cycle, ocean heat transport, and Antarctic ice dynamics. Investigating past variability in the Southern Ocean, including temperat...

How to improve paleothermometry from #TeamArchaea tetraether lipids in the Southern Ocean? Involve hydroxylated #isoGDGTs or make the most of non-hydroxylated isoGDGTs?
Hana Ishii et al. (2026) @egu-cl.bsky.social picked the latter:
cp.copernicus.org/articles/22/...
@egu.eu
#GDGTs
🧪 ⚒️ 🌊 👩‍🔬
#PaleoSky

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity Global marine sediment traps record seasonal changes in archeal tetraether lipid export from two depth-differentiated ecological groups Contribution of shallow-clade archaeal tetraethers increase...

This is a #TeamArchaea GDGT paper that I could not wait to see published in a journal after peer-review!
Addison Rice et al. (2026) PALO @agu.org:
doi.org/10.1029/2025...
With @appysluijs.bsky.social among the co-authors.
#GDGTs #isoGDGTs
🧪 ⚒️ 🌊 👩‍🔬
With implications for #PaleoSky

Love seeing the archaeal work at EMBL highlighted! 🥰 Feels great to be part of a growing community pushing this fascinating biology forward! #teamArchaea #EMBL 🧫🤓🧪🌏

Stepwise Cooling Events in the Western Arctic at 8.2 and 4.2 ka: Proxy Development and Application RI-OH’ index is established as a reliable proxy for the reconstruction of sea surface temperature (SST) in the western Arctic Ocean RI-OH’-SST stepwise cooling in the northern Chukchi Sea at 9.1–...

K. Suzuki et al. have just given another win for oceanic paleothermometry based on archaeal hydroxylated tetraether lipids—OH-isoGDGTs—which they developed and applied in the western Arctic Ocean and the Bering Sea:
doi.org/10.1029/2025...
@agu.org
#AGUPubs
#OHisoGDGTs #TeamArchaea
🧪 ⚒️ 🌊
#PaleoSky

Ring Indices: The Potential Archaeal Lipid Indicator For Methane Seepage Intensity at Cold Seeps Cold seeps OH-GDGTs 1–2 derived from ANME rather than Thaumarchaeota Ring Index (RI) and RI-OH’ overcome methane index saturation, enhancing methane flux sensitivity (0.5–100×) Ring indices qual...

Ring indices of archaeal tetraether lipids—degrees of #GDGTs cyclization—are not just paleothermometers!
Here X. Xu et al. propose the dual use of such ring indices and GDGT-based Methane Index to trace methane seepage dynamics:
doi.org/10.1029/2025...
#TeamArchaea
🧪 ⚒️ 🌊
Implications for #PaleoSky

Archaeal tetraether lipids as tracers for past marine environmental change Archaea are single-celled microorganisms that are abundant in marine environments and play a key role in the carbon and nitrogen cycles. Archaea can biosynthesize a wide variety of isoprenoid membrane...

As the expert on GDGTs at @cerege.bsky.social @climatecerege.bsky.social, it means a lot to me to be part of the Tier II authors, who led the development of the different sections and figures of this review.
🔗 to the ESSOpenArchive preprint:
doi.org/10.22541/ess...
#TeamArchaea
🧪 ⚒️ 🌊
#PaleoSky
(4/4)

I am so happy to co-author this #preprint review on archaeal tetraether lipids, aka #GDGTs, as marine paleoenvironmental indicators led by @lipidorama.bsky.social and @climategordon.bsky.social:
doi.org/10.22541/ess...
@cerege.bsky.social
@climatecerege.bsky.social
#TeamArchaea
🧪 ⚒️ 🌊
#PaleoSky
(1/4)

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

The first application of RI-OH lipid biomarkers to reconstruct the upper water column thermal structure. An example from the tropical Indian Ocean (Bay of Bengal) during the past 24 kyr Millennial-scale upper-ocean thermal structure variations of the northern tropical Indian Ocean are a robust indicator of past southwest monsoon (SWM)…

Archaeal hydroxylated glycerol dialkyl glycerol tetraether lipids, while initially used for paleotemperature reconstructions in polar oceans, are useful in tropical oceans as well!
See this example from the Bay of Bengal:
www.sciencedirect.com/science/arti...
#isoGDGTs #TeamArchaea
🧪 ⚒️ 🌊 🦣
#PaleoSky

Temperature-dependent spatial and temporal trends in archaeal lipid distributions - Communications Earth & Environment Isoprenoid glycerol dialkyl glycerol tetraethers, an archaeal lipid, are linked to global carbon dioxide concentrations and temperature dependent structural properties regulate their global spatial di...

This newly published study is in favor of a (further) consideration of isoGDGT-0 and crenarchaeol in addition to isoGDGT-1 to isoGDGT-3 and crenarchaeol isomer for paleo-reconstructions.
Siqi Zhao et al. (2025) @commsearth.nature.com
doi.org/10.1038/s432...
🧪 ⚒️ 🌊 👩‍🔬
#PaleoSky
#GDGTs #TeamArchaea

@birb pubmed.ncbi.nlm.nih.gov/rss/search/16EwU9ZeEIANz...

#TeamArchaea #PubMed

The last paper from Devika Varma’s PhD thesis is now published in Org. Geochem.:
www.sciencedirect.com/science/arti...
Many thanks to @islatope.bsky.social for the invitation to review this paper—yes, I signed the review report.
🧪 ⚒️ 🌊 👩‍🔬
With implications for #PaleoSky
#GDGTs #isoGDGTs #TeamArchaea

Yay! Another victory for #archaeal membrane-spanning tetraether #lipids as paleothermometers!
Zhou and Dong (2025) EPSL:
doi.org/10.1016/j.ep...
🧪
With implications for ⚒️ 🌊 and #PaleoSky
#TeamArchaea #GDGTs #iGDGTs #isoGDGTs

Investigating paleotemperature proxies based on archaeal hydroxylated tetraether lipids Understanding past sea surface temperatures (SSTs) is crucial for reconstructing Earth's climate history. Devika Varma has focused her PhD research pr…

Second, Devika Varma, who recently defended her PhD thesis. Her PhD work at @niozsearesearch.bsky.social aimed to investigate paleotemperature indicators based on archaeal hydroxylated tetraether lipids (OH-isoGDGTs):
www.nioz.nl/en/news/inve...
#GDGTs #isoGDGTs #TeamArchaea
🧪 ⚒️ 🌊
#PaleoSky
(2/4)

Congrats to Tobias Zachs for leading this project, together with @team1rocket.bsky.social and @xujwet.bsky.social, and collaborators @sshamphavi.bsky.social @1nussi1.bsky.social @archaellum.bsky.social 🧵5/5 #teamarchaea #T6SS #cryoEM #cryoFIB

EGU24-17926 abstract QR code

My regular poster presentation will contribute to the CL5.4 session convened by e.g. @olakwiecen3.bsky.social and @cindydejonge.bsky.social.

It goes without saying that I will contribute for both #TeamArchaea (regular and hydroxylated #iGDGTs) and #TeamBacteria (#brGDGTs) at #EGU24 this year! (3/5)