📣 Registration is now open for experts to review the First Order Draft of the Working Group I contribution to IPCC’s Seventh Assessment Report. Interested experts can register until 25 Sept 2026 🔗 https://bit.ly/4vi25cq The review starts 10 August until 2 October. More 🔗 https://bit.ly/WGI7Fod

📣 Registration is now open for experts to review the First Order Draft of the Working Group I contribution to IPCC’s Seventh Assessment Report. Interested experts can register until 25 Sept 2026 🔗 https://bit.ly/4vi25cq The review starts 10 August until 2 October. More 🔗 https://bit.ly/WGI7Fod

NOAA Climate & Global Change Postdoctoral Fellowship applications are now open! cpaess.ucar.edu/cgc/annual-r... I was one about 350 years ago, and cannot not speakly highly enough of this program. Applications due October 16, 2026

Check out our new community-level review of archaeal lipids in marine systems, with a focus on paleoenvironmental reconstruction

Ronnie Rattanasriampaipong@paleolipidrr.bsky.social · 4w ago

Excited to see this review paper published! OpenAccess: doi.org/10.1029/2025... We provide an updated view on the applications of archaeal lipids as environmental proxies. Shoutouts to our co-lead authors @climategordon.bsky.social and @lipidorama.bsky.social for spearheading on this.

New paper! We revisit Fredskild’s Greenland pollen diagrams from the 70s & compare these to published pollen & other temp estimates to dig into shrub response to climate in the Arctic. A fun collaboration between Bryan & me, inspired by our distinct & initially contrasting perspectives on the topic

Rapid shrub tundra responses to climate fluctuations in southwest Greenland during the middle to late Holocene

Studies of Arctic vegetation history during the Holocene have often concluded that significant lags related to dispersal and landscape (soil) developm…

sciencedirect.com

We have known for a long time that rapid CO2-induced global warming 56 million years ago caused extreme rainfall events and enhanced erosion of the landscape. Our new work shows that this drove increased burial of eroded soil and plant organic matter, which could have removed some of that CO2.

Nature Geoscience@natgeosci.nature.com · 2mo ago

⚒️ Article: The burial of terrestrially-derived organic carbon in coastal marine sediments greatly increased during the Paleocene-Eocene Thermal Maximum @climategordon.bsky.social @sotonoceanearth.bsky.social @unisouthampton.bsky.social www.nature.com/articles/s41...

And so, this important study for #PaleoSky and ⚒️ people like me is part of the #TopViewedArticle group! Thank you again Cindy De Jonge and Francien Peterse for leading this #TeamBacteria #brGDGTs round-robin study! 🔗: doi.org/10.1029/2024... @icta-uab.bsky.social @climatecerege.bsky.social 🧪 👩‍🔬 (1/3)

Interlaboratory Comparison of Branched GDGT Temperature and pH Proxies Using Soils and Lipid Extracts

39 laboratories participated in a round robin to determine the reproducibility of glycerol dialkyl glycerol tetraethers (GDGT) proxy values and quantities Peak selection impacts the ratio values ...

doi.org

Dr. Nina Davtian (she/her/hers)@ninadavtian.bsky.social · 2y ago

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) 🧪 👩‍🔬

Re-sharing now that it’s the current volume 🥳

Jamie McFarlin@isotopes.bsky.social · 5mo ago

A deep dive into a suite of water isotope proxies, many thanks to this great team: @yarrowaxford.bsky.social Bryan, Gabe, Wil & Jeemin

A deep dive into a suite of water isotope proxies, many thanks to this great team: @yarrowaxford.bsky.social Bryan, Gabe, Wil & Jeemin

Water-Isotope Proxies in Lake Sediments: Calibrations, Uncertainties, and New Directions

Paleoclimatologists have long recognized that H and O isotopes of materials in lake sediments can help reconstruct past climate and environmental change. Here, a global synthesis of O isotopes in lab-...

annualreviews.org

We're hiring! I'm recruiting a Postdoctoral Research Associate in climate & paleoclimate modeling of the tropical Americas. Come obsess over the tropical rain belt with me! :) Please share w/folks who may be interested. Ad here: wustl.wd1.myworkdayjobs.com/en-US/Extern...

Postdoctoral Research Associate - Earth, Environmental, and Planetary Sciences

Position Summary The Climate and Paleoclimate Lab in the Department of Earth, Environmental, and Planetary Sciences at WashU in St. Louis seeks a Postdoctoral Research Associate in tropical climate/pa...

wustl.wd1.myworkdayjobs.com

Mia is a highly talented PhD student approaching graduation at a tough time for U.S. science. I have to highlight another neat thing she's been up to: Art/science/community collaborations in the very special south Greenland town of Narsaq: www.miattuccillo.com/community-ou...

New paper! PhD student Mia Tuccillo has uncovered another big impact of past warming in Greenland: lakes lost oxygen for thousands of years and cyanobacteria took over 🦠 🧪 🦠. It's kinda yikes... With collaborator @geobiomaggie.bsky.social (1/3)

The vast majority of permafrost exists in the subsurface. What happens when this deep, ancient permafrost thaws? How fast does it take microbial communities to "wake up"? This project now published in JGR, with @isotopes.bsky.social , @kopflab.bsky.social , et al., aims to address that question!

Microbial Resuscitation and Growth Rates in Deep Permafrost: Lipid Stable Isotope Probing Results From the Permafrost Research Tunnel in Fox, Alaska

Microbial growth is extremely slow within the first 30 days of thaw. Temperature may drive which taxa are active, but not growth rates Subsurface microbes preferentially produce glycolipids over ...

agupubs.onlinelibrary.wiley.com

Excited to share our pre-print examining microbial activity and carbon utilization in the serpentinizing subsurface! Tl;dr: Serpentinite-hosted microbes are notably active, thriving on DIC despite alkalinity. Implications for #astrobiology, #carboncapture, and #GeoH2! www.biorxiv.org/content/10.1...

Dissolved inorganic carbon supports robust anabolism and methanogenesis in actively serpentinizing rocks

Serpentinites, hydrated ultramafic rocks that produce [hyper]alkaline, reducing, H2-rich groundwaters, host subsurface microbial ecosystems. Though in the presence of enormous reducing power, life in ...

biorxiv.org

Ever wondered how long it takes microbial life in permafrost to ‘wake up’ after thawed? Hydrogen SIPing pro @tacaro.bsky.social ‘s newest preprint👇👇👇

Tristan Caro@tacaro.bsky.social · 2y ago

Excited to share a new pre-print where we quantify microbial resuscitation and growth rates in deep subsurface permafrost accessed at the permafrost research tunnel. With @kopflab.bsky.social @isotopes.bsky.social et al. www.biorxiv.org/content/10.1...

for those who love both ggplot and dual-axis plots, rejoice! #rstats #dataviz #tidyverse

Jamie McFarlin@isotopes.bsky.social · 2y ago

You know how annoying it is to make overlapping plots on the same x-axis but different y-axis in ggplot? Well…not anymore! 🎉🎉 @tacaro.bsky.social @rabergj.bsky.social ggstackplot.kopflab.org

You know how annoying it is to make overlapping plots on the same x-axis but different y-axis in ggplot? Well…not anymore! 🎉🎉 @tacaro.bsky.social @rabergj.bsky.social ggstackplot.kopflab.org

Do you sample groundwater for subsurface geochemistry/microbiology? If so, check out the Open-source Well Geochemistry Logger (OpenWGL)! We developed a sensor array that can go down boreholes up to 1000m and is made out of commercially-available components (<~$1000)! github.com/tacaro/OpenWGL

Our group has lots on tap for #AGU24! Past big shifts in temperature, lake level, anoxia. Close looks at several water isotope methods. News from Greenland, New England, & the Midwest. A rundown:

Tues at #AGU24: my late-morning talk on several paleolim methods you might want to try (with fab collaborators including @petepuleo.bsky.social @isotopes.bsky.social @geobiomaggie.bsky.social) and (1/2)

Yarrow Axford@yarrowaxford.bsky.social · 2y ago

Tues a.m. I’ll explain why you might fall in love with moss and all things invertebrate in your lake mud. (In case you haven’t already.) PP22B-08: Do Aquatic Organic Macrofossils Reliably Record Lakewater Oxygen Isotopes? A Summary of Validations from Greenland (invited)

NSF makes you say who you got conflicts (coauthored) with. We (really just Jordan Matelsky) just built you a tool for that. Literally one click: bib.experiments.kordinglab.com/nsf-coa

So many lakes! And soil water 👀

David Harning@davidharning.bsky.social · 2y ago

💦 New paper from our group out on the modern isotopic variability of Icelandic lake and soil water. Excited to apply this framework in lake seds to explore paleohydrological changes in the middle of the North Atlantic! hess.copernicus.org/articles/28/...

Lipid biomarker peeps: do you routinely hydrolyze your TLE? Why/why not? Looking through the lit and it’s all over the board.

New preprint on Icelandic water isotopes in lakes, streams, and soils. This was a really fun collaborative effort, and we welcome community feedback! @isotopes.bsky.social @yarrowaxford.bsky.social hess.copernicus.org/preprints/he...

Spatiotemporal variation of modern lake, stream, and soil water isotopes in Iceland

Abstract. As global warming progresses, changes in high-latitude precipitation are expected to impart long-lasting impacts on earth systems, including glacier mass balance and ecosystem structure. Rec...

hess.copernicus.org

New LCMS, who dis?

Just out, a 66 million year history of atmospheric CO2. Key take away: CO2 hasn't been at today's levels for at least 3 million years. These high CO2 worlds in the geological past had less ice and *much* higher sea levels 📈🌊 ⚒️🧪 www.science.org/doi/10.1126/...

Are you a doctoral student? Want to explore how Earth and life dance together? 🧪⚒️🌎🔬🧬💃 Join us next summer in Italy and at Penn State! Dates and info for the 2024 International Geobiology Course here: t.co/nv3Ooy88Vn

Want to Go Deep learning about microbes from all 3 domains of life in what will be 6.5 weeks of low-suck factor time? Consider applying to Microbial Diversity at the MBL for summer 2024.