Crowd sourcing from the Bluesky hive mind: what are these patches with what look like ducts inside that I'm seeing on silver maple? They don't occur in every ring, rather sporadically. @yellowbuckeye.bsky.social @l-tulipifera.bsky.social #dendro

I am teaching a course on ancient trees and tree rings at the NY Botanical Garden on Sunday, October 26th and Sunday, November 2nd. We will learn about past environments, the amazing lives of trees, and what old trees tend to look like. Sign up at this link: www.enrole.com/nybg/jsp/ses...

Nice article talking about our new NSF-funded radiocarbon and stable isotope facility (The TIME Lab - Tree-Ring Innovations in Mass Spectrometry of Earth Systems) in the Laboratory of Tree-Ring Research at the University of Arizona! science.arizona.edu/news/univers...

Today is #WorldCarFreeDay. Too many neighbourhoods & cities are designed around cars, & prioritise vehicle movement on our streets. This blog explores how changing & reducing how we use cars can bring a huge range of benefits for people & the planet. www.tcpa.org.uk/low-traffic-...

Here's a gofundme to help out Josh Bregy, who recently was fired from his tenure-track job at Clemson

Why are increment borers so expensive? The 20" chainsaw on the left is $419 but the 20" increment borer on the right is $613 😔

Just how massive are trees in the Pacific Northwest? Here's a stump at Forks Timber Museum!

I am once again pitching my romantic comedy: - two academics start dating - discover they are each other's terrible reviewer - hijinks ensue Working title: Love is Double-Blind

Can you hear the dendrochronologists in their natural habitat? 🧪 #dendro

Put my #rstats skills to good use today: I helped my student fix their code that took 3 minutes to process 1 month of data but now only takes 110 milliseconds to process 1 year of data. I'm happy with little things like that :)

How it started, How it’s going (Judd et al. 2024 now in the Smithsonian, @leafwax.bsky.social !) www.science.org/doi/10.1126/...

Varying climate signals embedded in latewood blue intensity along an elevational gradient: A multi-species case study from the Great Basin, Nevada, USA www.sciencedirect.com/science/arti...

Belated #microscopicMonday. A region of suppressed growth in a hackberry tree from a local forest in Urbana, IL. This is a piece of deadwood so we still only have a floating chronology and can't pinpoint the time yet. #dendro 🧪

I keep seeing "post-doctoral student" in the news. Dear @nytimes.com, postdocs are full-fledged PhDs, not students. Please refer to them as researchers or scientists. www.nytimes.com/2025/05/16/n...

Lots of good advice here for college students (or anyone) being pressured to decide on a career, including: "People ask [about your plans] because they are trying to connect. A great answer is: 'I’m weighing options. How did you choose?'" wapo.st/4mbNOKH by @carolynhax.bsky.social [gift link]

Three things I want to spread in the world: the love for trees, the curiosity for science, and the joy of riding bikes.

On the quest to develop a drought atlas for Africa: www.science.org/doi/pdf/10.1...

After our paper and code were published, an R package that we used got an update and that broke our code 🙃 Thanks to @utk-dendro.bsky.social for alerting us. I was able to identify the issue and released a simple patch. The new code repo for the paper is now available: doi.org/10.5281/zeno...

Today I have presented "Relating Roman Rings: an open and reproducible approach to understanding provenance patterns of wood using networks" in S41 on archaeological networks at #CAA25. A great session with many wonderful network applications The slides: ronaldvisser.github.io/RelatingRoma...

On Friday, my son stayed home from school because he had a sore throat and wasn’t feeling well. He went with my husband to his office for the morning while I handled our daughter. When he came back at lunch, he was not interested in eating, saying his throat hurt too much. 1/n

Our department (Earth Science and Environmental Change, University of Illinois Urbana-Champaign) is hiring a full-time lecturer position in solid earth geoscience, starting Fall 2025. Come join our excellent, supportive department in beautiful friendly Chambana! illinois.csod.com/ux/ats/caree...

Please help us spread the news! 🧪

Our department (Earth Science and Environmental Change, University of Illinois Urbana-Champaign) is hiring a full-time lecturer position in solid earth geoscience, starting Fall 2025. Come join our excellent, supportive department in beautiful friendly Chambana! illinois.csod.com/ux/ats/caree...

The first paper for our Dendrochronologia SI (dendrochronology and knowledge of the human past) is already available, and it’s open access. Szabó et al have compared high-resolution archival data with dendroprovenance, to examine 18th&19thC timber use in Moravia. See what they found.

The color of tree rings—especially the blue spectrum—can be used to reconstruct past climate. But the heartwood-sapwood color change complicates this technique since it's unrelated to climate. Our new paper tackles this problem: 🧪🧵https://www.sciencedirect.com/science/article/pii/S1125786525000505

Parts of Alaska are losing 10+ meters of coastline yearly, and this loss may accelerate over the next century. Thanks @pnas.org for highlighting our work! www.youtube.com/watch?v=tQCd... www.pnas.org/doi/10.1073/...

The color of tree rings—especially the blue spectrum—can be used to reconstruct past climate. But the heartwood-sapwood color change complicates this technique since it's unrelated to climate. Our new paper tackles this problem: 🧪🧵https://www.sciencedirect.com/science/article/pii/S1125786525000505

During fieldwork last weekend, we encountered the elusive Borus stickerii, commonly known as the borer sticker. Both our borers got stuck and it took 20 minutes, a lot of sweat, and some creativity to eventually get them out. 😂

I have written a small R-script to download all tree-ring data from the ITRDB (measurements and chronologies). Anyone can create a local copy, just in case the data might not be available anymore from @noaa.gov github.com/RonaldVisser... #dendrochronology #treering #opendata #share

All major Po river high flow reconstructed periods correspond to known advance of Alpine glaciers during the Little Ice Age (1280-1320, 1600-1650, 1820 CE) ❄️🧊 2/ researchgate.net/publication/... journals.sagepub.com/doi/full/10....

A 1,000 yr Po river flow reconstruction & projection (1100-2100 CE)! 🌊 Want to put recent flooding into context? Impressive work showing the mean annual flow in the Po River (Italy's main river) may decrease by about 10% during the 21st century 📈 agupubs.onlinelibrary.wiley.com/doi/full/10.... 1/

Our recent paper on droughts in the Po River gets an Editor's highlight and is featured on Eos! We studied 1,000 years of droughts (1100-2100) from tree rings and climate models to understand how droughts manifest in the past, present, and future. agupubs.onlinelibrary.wiley.com/doi/full/10....

Spotted a bison herd on the Yellowstone live cam. Can you see the ones in the trees? Thanks to the National Park Service for bringing the parks closer to home. www.nps.gov/yell/learn/p...

A discussion on what old trees and what we can learn from them, but also, a reflection on how the global human intelligence can lift our cultural and environmental world. The evidence is everywhere: youtu.be/sTIB6Gg5PUU?... Also available in listening form from the Apple Finch podcast series

Happy to end my paper drought with my first postdoc paper on concurrent megadroughts in the southwestern regions of North and South America. Check it out!👇 journals.ametsoc.org/view/journal... @ametsoc.bsky.social @lamontearth.bsky.social

Exactly the same feeling when a scientist whose work inspired me said they liked my paper!

Thrilled to share that @ncar-ucar.bsky.social wrote a short piece summarizing our recent paper on the drivers of Southeast Asian rainfall extremes! www.cisl.ucar.edu/news/cisl-po...

Wonderful profile of legendary dendrochronologist Dave Stahle - www.nwaonline.com/news/2025/fe...

📢 Calling all tree-ring researchers! 🌳💍 The Association for Tree-Ring Research (ATR) annually awards prizes for the best Ph.D. & Master’s theses in tree-ring science! 🗓️ Deadline: Feb 15, 2025 📄 Details: tinyurl.com/ATRaward Nominate your students! ✨

Teambuilding! Isn't it great that there's a bowling alley on campus?

I am extremely excited to announce that for the first time ever, Skype a Scientist is offering mini-grants to support IRL science communication!! Communicating science out in our communities is critical. We want to enable others to get their projects off the ground! docs.google.com/forms/d/e/1F...

Your aperiodic reminder that this illustration is completely made up: diagrammonkey.wordpress.com/2023/01/24/o...

East coast: students will have outdoor recess when temperatures are above 40 °F. Midwest: students will have outdoor recess when temperatures are above 22 °F. Yeah if you wait till it's above 40 °F here you'll never be out for months!

We reconstructed 300 yrs of fire history in transverse ranges of CA from fire scars in the Bigcone Douglas-fir. The fire history of chaparral/BCDF may reflect fire history in the LA Basin, to some degree. A paper from Keith Lombardo’s dissertation is here: link.springer.com/content/pdf/...

The tube carriers are back at the airports 😄

The Tube Carriers Every winter The tube carriers Gather Hustle through airports To stand in front of a board And talk about what they love. #agu24

@agu.org is here!

🚨 New paper! 🌲🌲🌲 Monkey puzzle trees reproduce in mast years that occur synchronously across their range. But large-scale sync isn’t the norm - just when its warm. We reconstructed using #TreeRings, using the signal from varying reproductive costs in male and female trees doi.org/10.1002/ecs2.70087

Scientists, academics, researchers: We’re excited to share that @altmetric.com is now tracking mentions of your research on Bluesky! 🧪

The unofficial title of my #AGU24 poster is "We read 169 papers on streamflow reconstruction from tree rings, ask me anything". 😅 Drop by my poster on Monday morning to talk about tree rings, the water cycle, or anything in between. agu.confex.com/agu/agu24/me...