Jamie McFarlin
@isotopes.bsky.social
science enthusiast, think a lot about biogeochem
Asst professor, studying cold places
stable isotopes are my jam
Asst professor, studying cold places
stable isotopes are my jam
Reposted by Jamie McFarlin
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
October 29, 2025 at 5:25 PM
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...
Reposted by Jamie McFarlin
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...
Community Outreach: Greenland — Mia T Tuccillo
www.miattuccillo.com
October 1, 2025 at 3:18 AM
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...
Reposted by Jamie McFarlin
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)
With collaborator @geobiomaggie.bsky.social (1/3)
October 1, 2025 at 3:09 AM
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)
With collaborator @geobiomaggie.bsky.social (1/3)
Reposted by Jamie McFarlin
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!
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
September 26, 2025 at 6:35 PM
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!
This project now published in JGR, with @isotopes.bsky.social , @kopflab.bsky.social , et al., aims to address that question!
Reposted by Jamie McFarlin
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...
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 ...
www.biorxiv.org
August 26, 2025 at 4:48 PM
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...
www.biorxiv.org/content/10.1...
Reposted by Jamie McFarlin
Working on the interface of organic geochemistry and archeology? Have an exciting dataset that is ready to write up? Or one of those papers that has been a draft since the Stone Age? Consider this special issue to publish your research, submission by 01/09. shorturl.at/O3gzV
Organic Geochemistry | ScienceDirect.com by Elsevier - Organic Geochemistry | ScienceDirect.com by ElsevierScienceDirect
Read the latest articles of Organic Geochemistry at ScienceDirect.com, Elsevier’s leading platform of peer-reviewed scholarly literature
www.sciencedirect.com
April 30, 2025 at 10:27 AM
Working on the interface of organic geochemistry and archeology? Have an exciting dataset that is ready to write up? Or one of those papers that has been a draft since the Stone Age? Consider this special issue to publish your research, submission by 01/09. shorturl.at/O3gzV
Ever wondered how long it takes microbial life in permafrost to ‘wake up’ after thawed? Hydrogen SIPing pro @tacaro.bsky.social ‘s newest preprint👇👇👇
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...
With @kopflab.bsky.social @isotopes.bsky.social et al.
www.biorxiv.org/content/10.1...
Microbial Resuscitation and Growth Rates in Deep Permafrost: Lipid Stable Isotope Probing Results from the Permafrost Research Tunnel in Fox, Alaska
www.biorxiv.org
January 22, 2025 at 6:51 AM
Ever wondered how long it takes microbial life in permafrost to ‘wake up’ after thawed? Hydrogen SIPing pro @tacaro.bsky.social ‘s newest preprint👇👇👇
Reposted by Jamie McFarlin
January 15, 2025 at 9:04 PM
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
Create Overlapping Stacked Plots
Easily create overlapping grammar of graphics plots for scientific data visualization. This style of plotting is particularly common in climatology and oceanography research communities.
ggstackplot.kopflab.org
January 15, 2025 at 7:04 PM
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
Reposted by Jamie McFarlin
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
December 11, 2024 at 9:33 PM
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
Reposted by Jamie McFarlin
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:
December 8, 2024 at 6:12 PM
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:
Reposted by Jamie McFarlin
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)
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)
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)
PP22B-08: Do Aquatic Organic Macrofossils Reliably Record Lakewater Oxygen Isotopes? A Summary of Validations from Greenland (invited)
December 9, 2024 at 11:40 PM
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)
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)
Reposted by Jamie McFarlin
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
NSF COA | Jordan Matelsky
bib.experiments.kordinglab.com
November 11, 2024 at 8:11 PM
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 👀
💦 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/...
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 structures. Re...
hess.copernicus.org
September 18, 2024 at 11:02 PM
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.
March 11, 2024 at 6:49 PM
Lipid biomarker peeps: do you routinely hydrolyze your TLE? Why/why not? Looking through the lit and it’s all over the board.
Reposted by Jamie McFarlin
Immensely proud of my PhD student Fatemeh Ajallooeian who successfully defended her PhD yesterday! Keep an eye out for exciting work on the temperature dependency of lacustrine GDGTs within a single lake system!
February 3, 2024 at 8:12 PM
Immensely proud of my PhD student Fatemeh Ajallooeian who successfully defended her PhD yesterday! Keep an eye out for exciting work on the temperature dependency of lacustrine GDGTs within a single lake system!
Reposted by Jamie McFarlin
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
February 2, 2024 at 4:32 PM
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...
New LCMS, who dis?
December 19, 2023 at 5:22 AM
New LCMS, who dis?
Reposted by Jamie McFarlin
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/...
December 7, 2023 at 10:04 PM
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/...
Reposted by Jamie McFarlin
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
October 28, 2023 at 6:59 PM
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
Reposted by Jamie McFarlin
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.
November 9, 2023 at 9:19 PM
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.
Reposted by Jamie McFarlin
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.
Iso2k is the source of & inspiration for some of my best science, and definitely the source of some of my favourite science people.
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 ...
www.nature.com
November 2, 2023 at 9:04 PM
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.
Iso2k is the source of & inspiration for some of my best science, and definitely the source of some of my favourite science people.
Reposted by Jamie McFarlin
Reposted by Jamie McFarlin
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.
September 26, 2023 at 3:31 PM
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.
Hello bluesky! Please help me to share my latest 🧪🍃🌎 with @geobiomaggie.bsky.social, @yarrowaxford.bsky.social, Stephanie Kusch and others
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Science | AAAS
www.science.org
September 29, 2023 at 7:43 PM
Hello bluesky! Please help me to share my latest 🧪🍃🌎 with @geobiomaggie.bsky.social, @yarrowaxford.bsky.social, Stephanie Kusch and others
www.science.org/doi/full/10....
www.science.org/doi/full/10....