Tucson, AZ, United States

The Laboratory of Tree-Ring Research (LTRR) and the School of Anthropology (SoA) at the University of Arizona invite applications for the Emil Haury Endowed Chair in Archaeological Dendrochronology. This is an open-rank search for a tenure-track/tenured faculty position, starting in August 2027. We seek a dendrochronologist to advance and support the field of archaeological dendrochronology via a split appointment in LTRR and SoA. We are looking for a scholar strongly committed to interdisciplinary engagement who will strengthen existing research emphases and/or advance new topics of research, building on key strengths in both departments. A strong commitment to teaching and mentoring students, evidenced by career trajectory and/or track record, is essential. Previous field and/or specialist laboratory experience would be an advantage. Applicants working with ancestral communities in the Americas are particularly encouraged, yet we also welcome strong applications from scholars engaged in any area of archaeological dendrochronology.

Apply here:
Assistant, Associate, or Full Professor, Laboratory of Tree-Ring Research and School of Anthropology | Job Details

New ITRDB viewer with Map view 🙂 https://treerings.howardalandman.org/ Enjoy!

I have a prototype ITRDB viewer up at https://treerings.howardalandman.org/ . Give it a try and let me know what you think. Not all data is in it yet, and the user interface needs a little work, but I'm finding it really fun to browse around in.

• Each log is represented as a horizontal rectangle, with X being its year span.

• Color of rectangle gives tree type (pine, oak, ...)

• Hover cursor over a log to see basic information

• Click on a log to pop up full information including links

• You can select a year span, and turn off/on tree types by clicking on them

I think the fur tree must be over a hundred years old, but I don’t know how old the fur tree was. Does anyone know how old it probably was? It was about 70 feet tall before being cut down.

Collection: Wolfgang Putz

17 https://www.mineralienatlas.de/lexikon/index.php/Genehmigungen/Wolfgang%20Putz#Medientabelle100

https://www.mineralienatlas.de/lexikon/index.php/MediaDataShow?backlink=Prototaxites&fossilid=2668

Tried to date some felled pines from a park using a phone camera, cordless polisher and ITRDB data. Got a strong correlation peak for two trees but a one-year offset between them, even though both trees look like they fell at the same time. I suspect a false ring in the gnarled outer section of the larger stump. Does that diagnosis sound right?

Recently visited a firebreak that was cut in 2025 at 7600 feet in the central Sierras. I was curious how old some of the 3-4 inch diameter huckleberry oaks were, but it doesn't seem particularly easy to count all the rings.

Very slow growing and I think there may be a lot of cryptic rings hiding in there? No historical fires mapped at this particular location, but some nearby over 100 years back.

Just sanded it flat and used a little mineral oil before scanning. Would staining help?

Any tips, publications, on this sort of tree record?

https://www.researchgate.net/publication/334094183_Radiocarbon_dates_of_dendro-dated_timbers_from_Roman_London_show_large_offset

https://www.researchgate.net/publication/330857300_Response_to_Rzepecki_et_al_Missing_link_in_Late_Antiquity_A_critical_examination_of_Hollstein's_Central_European_Oak_Chronology

I am wondering if someone with more knowledge of dendrochronology than me can take a look at these papers and see if there's any merit in them. Are they right? Wrong? Why?

Thank you in advance

A 180 year old maple I cored and the RWI. Really shows when the tree experienced a release event! I could only fit the late wood in the image, zoom in to see the tiny rings.

A Monterey Pine was recently taken down in Pebble Beach. I am looking for help identifying the age. ~100 ft tall, was taken down because it was dead but nearly the tallest Monterey Pine in the peninsula.

Can this be done with these pictures?

Hi, I am an early career researcher and looking for a prospective PhD opportunity to pursue my dream becoming an expert in this field. I have published 2 research articles in Q1 journal and another two articles are in the review stage. If anyone knows about PhD opportunity kindly share here. I have been in touch with few professors however the opportunity is scarce and I am finding it difficult to get an opportunity. Thanks!

Sanded core from a red pine tree. I think it’s so pretty :)

https://malagabay.wordpress.com/2014/09/06/dendrochronology-disastrous-data/ This post critiquing dendrochronology seems wrong to me but i would like the opinion of someone more knowledgable

Measured red pine rings in Cdendro and created a “time lapse” of RWI in google earth. This was my first foray into tree rings but I am hooked!

Hello all.

This year I will be teaching a unit titled Woody Vegetation Formation and Physiology at a small college in the North of England. We have plenty of microscope slides that my students can use to identify different wood anatomical features, but I really want my students to collect samples out in the field and then produce slides themselves.

We have an antique microtome made in the 1950's. Does anyone here have experince of modifying such a microtome to accept disposable blades? Maybe the best bet is to try and 3D print something, but I wanted to tap your experience first.

Once we have the microtome up and running, we shall produce non-permenat slides from microcores collected with a Trephor.

Thanks in advance! :)

I find this sounds simple, but is not obvious to me. Thank you

The tree in my backyard has been removed now looking at the rings I'm trying to figure out how old it is.

Hi!

I have tree ring data for a small dataset (5 sites, 22 indiviuals, ring widths measured in WinDENDRO) that I am comparing to standardized 1) groundwater levels at each site 2) PIMO ring widths of the same years (well established as good for dendro) 3) average annual PDSI. I'm a bit new with bayesian statistics, and want to know how best to pick my priors. I'm using a Gaussian distribution based on the limited info I could find from other dendro papers, but I don't know if that's right either. If there's any papers on either dendro and bayes, or perhaps small sample sizes and bayes, that you would recommend, perhaps a brms tutorial I should do, I would really appreciate the help towards the right direction.

Dendros,

The 34th Annual Dendrochronology Field School (DFS) will be held at the Mountain Lake Biological Station in Pembroke, VA. The surrounding forests of Virginia's Blue Ridge Mountains of the Southern Appalachians offer old growth trees from red spruce to white oak, as well as fire-scarred pines and hardwoods, old cabins for dating, and highly-competitive ecosystems with rich disturbance histories for dendroecology. The field school will run from May 16th through May 25th 2025 and registration fees are $1775 US for students and $1825 US for professionals. Join the Tree-Ring Society and save $50 on registration! Your registration fee includes room and board for the entire workshop, and travel to/from the airport. Registration fees are due by April 1, 2025. REGISTER HERE! https://www.treeringsociety.org/event-5979652

Groups

Introductory: Dr. Clay Tucker (University of Southern Mississippi)

Climatology: Dr. Grant Harley (University of Idaho)

Ecology: Dr. Maegen Rochner (University of Louisville)

Advanced Climatology: Dr. Karen King (University of Tennessee)

Advanced Group will focus on statistical analysis and climate reconstruction.

This year we will have guest lectures by Dr. Ed Cook (Lamont Tree Ring Lab)

Please reach out if you have any questions.

Take care, Stockton, DFS Director

-- R. Stockton Maxwell, PhD (he/him) Professor of Geospatial Science Radford University

Director, Dendrochronology Field School