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Schedule your visit today.

Please visit https://ltrr.arizona.edu/docents for additional information. 

  • Established by the pioneer of dendrochronology.

    A.E. Douglass, originator of the science of tree-ring dating, founded the Laboratory of Tree-Ring Research in 1937.
    https://ltrr.arizona.edu/about/history
  • Pursuing interdisciplinary research.

    Dendrochronology helps reconstruct environmental change, and unravel processes in ecosystems and human societies; researchers in many parts of the world collaborate with the Laboratory of Tree-Ring Research.
    https://ltrr.arizona.edu/research
  • Hosting an on-line seminar series.

    The Tree Ring Talks seminar series is now available on Zoom.
    Upcoming talks ≫
  • Community art workshop

    Saturday, April 12, from 10 AM to 2 PM
    Event details
  • Established by the pioneer of dendrochronology.

  • Pursuing interdisciplinary research.

  • Hosting an on-line seminar series.

  • Community art workshop

News

Dr. Valerie Trouet is holding a  sequoia cross section.

Museum Day 2025

Monday, March 17, 2025

The LTRR has been awarded a grant by the National Endowment for the Humanities (NEH) for Experiential training of the next generation of museum professionals through American Southwest cultural heritage collections.

Read more

NEH grant for curation program

Tuesday, January 21, 2025

The LTRR has been awarded a grant by the National Endowment for the Humanities (NEH) for Experiential training of the next generation of museum professionals through American Southwest cultural heritage collections.

Read more
NASA Solar Dynamics Observatory image of a prominance.

A huge solar eruption hit the Earth between 664 and 663 BCE

Thursday, December 19, 2024

Irina Panyushkina of the LTRR has led a team elucidating more details of the huge solar eruption that hit the Earth around 664 BCE.

Read more
A cross section from a tree that drowned when a forest was carried into Lake Washington as part of a landslide.

Tree rings reveal a new kind of earthquake threat to the Pacific Northwest

Wednesday, September 27, 2023

New paper by LTRR lead author Bryan Black

Read more
AGU web page for Willi Dansgaard Award with Kevin Anchukaitis portrait inset

Kevin Anchukaitis receives Willi Dansgaard Award

Friday, September 15, 2023

The AGU honors Kevin Anchukaitis with the 2023 Willi Dansgaard Award.

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Sediment core tube held in a small boat on a lake.

Has the Earth been warming or cooling over the past few thousand years?

Thursday, February 23, 2023

LTRR postdoc Ellie Broadman is co-author of an article reviewing the trends in global temperature over the last few thousand years.

Read more
  • Read All News

Tuesday, May 27

  • 10:00 AM to 11:30 AM
    Docent Tour

Tuesday, June 3

  • 10:00 AM to 11:30 AM
    Toxic Detective Summer Camp

Monday, June 9

  • 2:00 PM to 3:50 PM
    Docent Tour

See Calendar →

College of Science

Bryant Bannister Tree-Ring Building, 1215 E. Lowell Street, Tucson, AZ 85721-0045, USA office@ltrr.arizona.edu 520-621-1608

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