Jessica Tierney

@leafwax.bsky.social

Climate scientist living in the Sonoran Desert. Analyzer of leaf waxes to learn about past climate change. Professor at the University of Arizona. I also like birds, nature, pets🦉🌿🐕 | Opinions are mine, not those of my employer

Benito is a threat b/c he makes art so alluring and enjoyable you want to understand everything about it and then you end up learning about sugar and slavery and colonialism and the Taínos and Hawaii and then you probably have some thoughts of your own, and that's why art is powerful and dangerous

Really excited to see this paper out!! Led by @vtcoop.bsky.social we show that if you use cold and warm paleoclimates together, you can reduce uncertainty in Earth's climate sensitivity by quantifying the pattern effect and more precisely constrain future climate change www.pnas.org/doi/10.1073/...

Paleoclimate pattern effects help constrain climate sensitivity and 21st-century warming | PNAS

Paleoclimates provide examples of past climate change that inform estimates of modern warming from greenhouse-gas emissions, known as Earth’s clima...

pnas.org

I am currently seeking a Lab Manager for our Organic Geochemistry Lab at the University of Arizona! Full time position with benefits. If you have a chemistry/biology/geology degree and like fixing things and working with students, this position could be for you! arizona.csod.com/ux/ats/caree...

Laboratory Coordinator I - Geosciences

Maintenance and repair of the Organic Geochemistry Laboratory equipment, including but not limited to gas chromatographs, liquid chromatographs & ...

arizona.csod.com

A proposed Amazon data center in Tucson (“Project Blue”, FFS) that would have sapped power and water from the city has been REJECTED thanks to amazing community solidarity. The people of the desert have spoken and won ✊🌵🏜️

Yana Kunichoff@yanak.bsky.social · 12mo ago

The Tucson city council unanimously rejected the Project Blue data center today. That comes after weeks of dogged organizing plus our little team @azluminaria.org going hard on helping Tucson understand who was behind this project and its impact on our community azluminaria.org/2025/08/06/t...

This @wired.com article is extremely timely for those of us in Tucson, Arizona, as we face the possibility of Amazon Web Services building a huge data center at our outskirts. Energy and water use for AI data centers are non-trivial. Read my thread below if you want to hear about our local story ⬇️

WIRED@wired.com · last yr.

AI this, AI that, what about how much energy AI actually uses? “It blows my mind that you can buy a car and know how many miles per gallon it consumes, yet we use all these AI tools every day and we have absolutely no efficiency metrics, emissions factors, nothing." From the experts:

As of today, all current NOAA Climate and Global Change postdoctoral fellows have been furloughed due to the Dept of Commerce not releasing the funding for the program. In addition no new Fellows were awarded this year. cpaess.ucar.edu/cgc

NOAA Climate & Global Change (C&GC) Postdoctoral Program | Cooperative Programs for the Advancement of Earth System ScienceNOAA Climate & Global Change (C&GC) Postdoctoral Program | Cooperative Progra...

cpaess.ucar.edu

Yesterday, the NIH R35 “Outstanding Investigator” grant to fund scientists in my lab studying antibiotic resistance was terminated for reasons not related to the content of the science, or any actions taken by me or members of my lab

A screenshot of the termination notice showing "Outstanding Investigator Grants"A screenshot of the termination notice with "This award is terminated effective the date of this award, due to unsafe antisemitic actions that suggest the institution lacks concern for the safety and wellbeing of Jewish students." highlighted

Hard to post about ‘normal’ things, but - we had an amazing field trip out to CA with ugrads to learn and practice oceanography this Spring ❤️🌊 when things are dark I get a boost from teaching great students!

A student drops a secchi disk off the side of the boatStudents explore contents of a biological dredgePanorama of students on an oceanographic vesselStudents learning about sedimentary rock layers at the California coast