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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

Tuesday, August 24, Thursday, August 26, Tuesday, August 31, Thursday, September 2, Tuesday, September 7, Thursday, September 9, Tuesday, September 14, Thursday, September 16, Tuesday, September 21, Thursday, September 23, Tuesday, September 28, Thursday, September 30, Tuesday, October 5, Thursday, October 7, Tuesday, October 12, Thursday, October 14, Tuesday, October 19, Thursday, October 21, Tuesday, October 26, Thursday, October 28, Tuesday, November 2, Thursday, November 4, Tuesday, November 9, Thursday, November 11, Tuesday, November 16, Thursday, November 18, Tuesday, November 23, Thursday, November 25, Tuesday, November 30, Thursday, December 2, Tuesday, December 7, Thursday, December 9, Tuesday, December 14, Thursday, December 16

  • 9:00 AM to 5:00 PM
    GEOS 439A Intro to Dendro & Lab

Tuesday, October 26

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

Wednesday, October 27

  • 12:00 PM to 1:00 PM
    Using tree-ring chronologies to calibrate a forest gap model in Denali National Park

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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