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-...

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

Welcome (back) to the department!!

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...

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...

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...

Earth scientists Maggie Osburn and Mia Tuccillo bag up plant samples in a rocky Greenland landscape, with an iceberg-spotted fjord and glacier-covered mountains in the background.

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)

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 ...

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!

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 ...

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...

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

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

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

@tacaro.bsky.social @rabergj.bsky.social

A person in a yellow safety vest hoisting a sensor out of a borehole

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)

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 👀

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

Ah! Same. I am still partial to xcalibur 😂😭

Oh nooo this is bad news for us, we’ve been trying to figure out how to do this too…. Is it really only export as .pdf??

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...

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...

Amazing! Want #40 😆? Just got our new hplc up and running!

New LCMS, who dis?

Graph showing atmospheric CO2 over the last 66 million years superimposed on bands indicating levels of global warming

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.

Globally coherent water cycle response to temperature change during the past two millennia - Nature ... Global temperature fluctuations during the last 2,000 years caused consistent changes in ocean evaporation and atmospheric moisture condensation processes, reflected in coherent water isotope signals ...

Today in Nature Geoscience, a culmination of NINEish years of hard work by 40+ people, lead by the indefatigable @otherrock.bsky.social

Iso2k is the source of & inspiration for some of my best science, and definitely the source of some of my favourite science people.

Earth Layers xkcd.com/2840

Just added 63 Greenland geology photos to geologypics.com --all (+5000 more) for free download to support your class. Type "Greenland" into the search and you'll now get 91 images, 8 of which are shown here. Or try a different place or Earth Sci feature (try "landslide") Please share.