Dendrochronology Laboratory, Laboratory of Tree-Ring Research

Dendrochronology Laboratory, Laboratory of Tree-Ring Research
Name	Dendrochronology Laboratory, Laboratory of Tree-Ring Research

Dendrochronology Laboratory, Laboratory of Tree-Ring Research is a specialized research unit focused on the analysis of tree-ring chronologies for scientific, cultural, and resource-management applications. The laboratory integrates field sampling, lab-based measurement, and statistical crossdating to produce absolute dating and climate reconstructions used by scholars across University of Arizona, Smithsonian Institution, National Oceanic and Atmospheric Administration, United States Geological Survey, and National Aeronautics and Space Administration. It serves as a hub connecting investigators from Harvard University, Yale University, University of Oxford, University of Cambridge, Stanford University, and international partners including Max Planck Society, French National Centre for Scientific Research, and Australian National University.

History

The laboratory traces intellectual roots to pioneers such as A.E. Douglass, whose work linked solar cycles with tree rings and informed early projects involving National Geographic Society and Carnegie Institution for Science. Institutional development involved collaborations with University of Arizona departments and funding from agencies like the National Science Foundation, the Smithsonian Institution and the National Endowment for the Humanities. Over decades the unit interacted with projects led by figures like Ed Cook, Mike Baillie, Gordon Jacoby, Paul H. C. Tregenza and initiatives associated with International Tree-Ring Data Bank and PAGES (Past Global Changes). The laboratory contributed chronology syntheses used in studies published by partners including Nature, Science, Proceedings of the National Academy of Sciences, and reports for Intergovernmental Panel on Climate Change.

Facilities and Equipment

Laboratory infrastructure supports high-precision work with instruments procured from manufacturers used by teams at USDA Forest Service labs and university partners. Key equipment includes Velmex sliding stages and measuring systems similar to those used at Swiss Federal Institute for Forest, Snow and Landscape Research, high-resolution flatbed scanners adopted by Royal Botanic Gardens, Kew, and LINTAB measuring devices like those in labs at University of Freiburg and ETH Zurich. The lab houses comparative collections akin to those at Museum of Natural History, London and climate-controlled storage modeled after archives at British Library and Library of Congress. Analytical capacity incorporates software for crossdating and chronology development paralleling tools used at NOAA Paleoclimatology Program and statistical packages employed by researchers at Columbia University and Princeton University.

Research and Methods

Research emphasizes dendrochronological techniques refined by authors such as Fritts and Speer including crossdating, ring-width measurement, density analysis, and isotope ratio studies used in projects with Lawrence Berkeley National Laboratory and Oak Ridge National Laboratory. Methods integrate stable isotope analysis methods used by teams at Woods Hole Oceanographic Institution and radiocarbon wiggle-matching linked to work at Oxford Radiocarbon Accelerator Unit and ETH Zurich's Laboratory of Ion Beam Physics. Studies inform paleoclimate reconstructions in collaboration with NOAA, IPCC contributors, and paleoecological research undertaken with Smithsonian Tropical Research Institute and University of Colorado Boulder. Statistical approaches draw on techniques deployed by researchers at Pennsylvania State University, University of Washington, and University of Arizona.

Collections and Specimens

Specimen holdings include living-tree cores, historical beams, and archaeological timbers comparable to collections at Dawson City Museum, Viking Ship Museum, and Historic England. The collection supports crossdating against master chronologies like those maintained at the International Tree-Ring Data Bank and regional archives curated by Alaska Climate Research Center, Colorado State University, and University of New Mexico. Notable specimen sources encompass wood from sites related to Mesa Verde National Park, Chaco Culture National Historical Park, Yellowstone National Park, and Denali National Park and Preserve, and timbers associated with structures cataloged by Historic American Buildings Survey. Curatorial practices mirror standards from Smithsonian Institution Archives and National Archives and Records Administration.

Education and Outreach

Educational programs mirror outreach models of American Association for the Advancement of Science and public engagement strategies of Smithsonian Institution with workshops, training courses, and internships similar to those run by Tree-Ring Society and university summer schools at University of Arizona and University of Sheffield. The lab partners with museums such as Museum of Natural History, New York and Field Museum for exhibits, and collaborates with media produced by National Geographic and broadcasters like BBC and PBS for public science communication. Curriculum development aligns with materials used by National Science Teachers Association and regional K–12 science initiatives supported by United States Department of Education grant programs.

Collaborations and Contributions to Dendrochronology

The laboratory engages in multi-institutional collaborations with NOAA Paleoclimatology, National Science Foundation, European Research Council, Max Planck Institute for Chemistry, University of Innsbruck, University of Bern, University of Alberta, University of British Columbia, University of Tokyo, Chinese Academy of Sciences, Indian Institute of Science, University of Cape Town, University of Buenos Aires, CONICET, and CSIRO. Contributions include regional chronologies used in interdisciplinary studies alongside researchers from Harvard Forest, Lamont-Doherty Earth Observatory, Plymouth Marine Laboratory, and Scripps Institution of Oceanography. The lab’s datasets have underpinned reconstructions cited by authors from MIT, Yale School of the Environment, University of California, Berkeley, and policy-relevant assessments contributed to panels convened by IPCC and advisory reports for agencies such as USDA Forest Service and Bureau of Land Management.

Category:Dendrochronology Category:Laboratories