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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
  • Housed in a custom facility.

    A building constructed in 2013 provides lab and office space, augmented by a building recently renovated as a wood sample archive.
    https://ltrr.arizona.edu/building
  • 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 ≫
  • Established by the pioneer of dendrochronology.

  • Housed in a custom facility.

  • Pursuing interdisciplinary research.

  • Hosting an on-line seminar series.

News

Tree-Ring Day

Tree-Ring Day 2023

Friday, March 24, 2023

The LTRR's part of the School of Earth and Environmental Sciences EarthWeek is Tree-Ring Day: lightning talks, the regular Tree-Ring Talk, catered meals, and other activities.

Read more
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

Music from Tree Rings

Monday, December 19, 2022

The Arizona Daily Star newspaper's front page lead article was on the musical collaborative project featuring Margaret Evans and Kelly Heilman of the LTRR.

Read more

Dr. Charlotte Pearson Receives National Science Foundation MRI Grant for Groundbreaking Mini Carbon Dating System

Tuesday, October 18, 2022

Dr. Charlotte Pearson Receives National Science Foundation MRI Grant for Groundbreaking Mini Carbon Dating System

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Valerie Trouet named Scientific Director of the new Belgian Center for Climate Expertise

Wednesday, September 28, 2022

Valerie Trouet has been named the Scientific Director of the new Belgian Center for Climate Expertise.

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Connie Woodhouse named AGU Fellow

Sunday, September 18, 2022

Connie Woodhouse has been named to the 2022 Class of Fellows by the American Geophysical Union. 

Read more
  • Read All News

Wednesday, March 29

  • 12:30 PM to 2:30 PM
    Tree growth and hydrology in Southeastern South America: how tree rings reveal the history of climate and streamflow in Uruguay

Friday, March 31

  • 3:30 PM to 4:30 PM
    College of Engineering Advisory Board Tour

Monday, April 3

  • 8:00 AM to 10:00 AM
    Pelletier Public Defense 9AM

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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