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NOW OPEN!

The Tree-Ring Lab is pleased to announce that we are resuming tours in a limited capacity.

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

Save the Date - Tree-Ring Listening

Thursday, October 14, 2021
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The Films of Andrew Ellicott Douglass: Astronomer, Archaeologist, and Father of Tree-Ring Dating - Virtual

Tuesday, September 21, 2021
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Trees Stir in their Leaves

Sunday, August 8, 2021
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Water flows in the creek, but snow covers the ground and trees in the background.

Navajo Nation water management needs drive a snowpack reconstruction

Monday, March 8, 2021

Navajo Nation water managers have obtained a tree-ring reconstruction of snowpack water resources.

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The base of a giant sequoia trunk in the snow.

Giant sequoia tree rings reveal snow history

Thursday, January 28, 2021

LTRR researchers have published a paper reconstructing the history of snow accumulation in California over thousands of years from giant sequoia tree rings.

Read more
Accelerator Mass Spectrometry radiocarbon dating lab

New and improved radiocarbon calibration curves

Wednesday, August 12, 2020

The new and improved IntCal20 radiocarbon calibration curves have just been released and are now available for use by anyone using the radiocarbon dating method.

Read more
  • Read All News

Wednesday, October 20

  • 10:00 AM to 11:00 AM
    Docent-led tour

Wednesday, October 20

  • 12:00 PM to 1:00 PM
    Tree rings and the Truckee River: paralleling the past and the present

Thursday, October 21

  • 8:00 AM to 9:30 AM
    Tucson HS Dendro class & 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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