Paleoclimatologist, Geologist, Geochemist
@UCSC
Joined October 2013
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Polissar retweeted
Honored to be among this list of great writers and essays. Thanks to the editors @Longreads for the lovely words ❤️
Today as part of our "Best of" package, we're sharing the reported essays we loved in 2023. Read unforgettable work by @S_Praetorius, @JenSeniorNY, @npbowlin, Guy D. Middleton, and @tomvanderbilt longreads.com/2023/12/07/bes…
Polissar retweeted
A huge amount of effort went into this paper by the community and by a dedicated group of lead authors, I played a teeny tiny part in it, but delighted to see it published science.org/doi/10.1126/scie…
Polissar retweeted
Massive new review of ancient atmospheric CO2 levels and corresponding temperatures by a consortium of 80+ researchers coordinated by @columbiaclimate @LamontEarth geochemist Bärbel Hönisch lays out daunting picture of where Earth's climate may be headed. lamont.columbia.edu/news/new…
ALT The edge of the Greenland Ice Sheet, where recent melting has left bare ground. Credit: Kevin Krajick
Polissar retweeted
"In summary, the Cenozoic compilation confirms a strong link between CO2 and GMST across timescales from 500 kyr to tens of millions of years,..." science.org/doi/10.1126/scie…
Polissar retweeted
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 📈🌊 #COP28 science.org/doi/10.1126/scie…
ALT A graph showing the history of CO2 over the last 66 million years superimposed onto of colours indicating global temperatures
Polissar retweeted
Seismica by the numbers! 💯
We’ve completed two issues, the current third issue has several articles available, and our special issue on the is also in progress. Check them all out here:
seismica.library.mcgill.ca/i…
Polissar retweeted
Great news: We officially have a publisher!
@CUOpenResearch has just accepted our proposal. We're very much looking forward to working with them to further Diamond Open Access in Geochemistry/Cosmochemistry.
Also, keep voting for the logo! forms.gle/vRMdDnRTiRrk8CSR8
Excited to share a new paper by @gcoffey_ that compiles estimates of friction heating from earthquakes across many faults to show how the energy budget of large and small earthquakes are different. Published in all OA and no-pub-fee @WeAreSeismica: seismica.library.mcgill.ca/a…
In small earthquakes (<1-10 m of slip), the earthquake energy budget is dominated by frictional heating, while in large earthquakes (>1-10 m of slip) energy is more equally split between frictional heating, radiating seismic waves, and damage (fractures).
Huge shout out to the journal Seismica @WeAreSeismica, a new community-driven diamond open-access journal. That diamond 💎 means it is free to read (without subscription), and there are no article processing fees for authors.
Polissar retweeted
Hey Grad Students excited about GEOBIOLOGY!
The 2023 International Geobiology Course will feature incredible field experiences in Italy and awesome research at Penn State. You can learn more and apply (by Feb 10) here:
sites.google.com/psu.edu/igc…
Polissar retweeted
🎉Congratulations to @ucsc Ocean scientist Christina Ravelo for being awarded the 2022 Maurice Ewing Medal by @theAGU for her significant original contributions to the ocean sciences and outstanding service to the marine sciences.🌊
news.ucsc.edu/2022/10/ravelo…
Polissar retweeted
💩 🧬 🐑!!!
Super excited to share our new paper out today in @CommsEarth! We show that humans arrived to the Faroe Islands 300 years before the Vikings using lake sediment biomarkers and ancient DNA. If you’re at #AGU21 you can watch my recorded talk about this project too!! 🐑 💩 🧬
Polissar retweeted
.@Columbia's Lamont-Doherty seeks a Senior Staff Associate to oversee day-to-day operation of organic geochemistry laboratory, including equipment use/maintenance, training, sample analyses, data analysis/reporting, and more. Please RT. Learn more/apply: academic.careers.columbia.ed…
ALT Aerial View of Lamont Campus. Credit: James Spencer
Polissar retweeted
Whaaat? Another🔥hot paper🔥from the amazing Allison Karp!
agupubs.onlinelibrary.wiley.…
Polissar retweeted
Our paper on central equatorial Pacific SSTs during the LGM is out! Me, Lynch-Stieglitz, @TomMarchitto & @PaleoLab agupubs.onlinelibrary.wiley.…