tree ring


Definition of tree ring

Examples of tree ring in a Sentence

Recent Examples on the Web Dozens of scientists from countries around the world have contributed nearly 700 records to the open-access database, adding details about ancient climate that were uncovered in glacial ice, ocean sediments, tree rings, corals and other sources. Brian Handwerk, Smithsonian, "Modern Climate Change Is the Only Worldwide Warming Event of the Past 2,000 Years," 20 May 2018 Examining the width of the tree rings in each core, for example, gives clues about when—and for how long—periods of drought occurred. Jenny Howard, National Geographic, "Megadroughts could return to southwestern U.S.," 24 July 2019 When phytoplankton and other things fall from the surface to the seafloor, they are left undisturbed, forming perfect, annual layers, akin to tree rings or a glacier’s layers. Carolyn Kormann, The New Yorker, "Where Does All the Plastic Go?," 16 Sep. 2019 In North America, few tree ring records can precisely calibrate such early radiocarbon dates, but a state-of-the-art probabilistic model placed the start of the occupation at between 16,560 and 15,280 years. Lizzie Wade, Science | AAAS, "First people in the Americas came by sea, ancient tools unearthed by Idaho river suggest," 29 Aug. 2019 Examining tree rings and scorch marks, Stephens was able to construct a record of fires dating back to the sixteen-hundreds. Nicola Twilley, The New Yorker, "A Trailblazing Plan to Fight California Wildfires," 19 Aug. 2019 Researchers have often attached caveats to these names over the years, noting that data based on things like tree rings shows different things in different locations. Scott K. Johnson, Ars Technica, "No climate event of the last 2,000 years looks like humanity’s," 25 July 2019 Dendochronology, the study of tree rings, can date wooden structures or objects. Erin Blakemore, National Geographic, "How archaeologists determine the date of ancient sites and artifacts," 28 June 2019 Some of their analyses—which looked at tree rings, ice cores, and cave formations, among other sources—used simple correlations. Sid Perkins, Science | AAAS, "Ancient global climate events rippled unevenly across the globe," 24 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tree ring.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tree ring

1919, in the meaning defined above

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Last Updated

3 Nov 2019

Time Traveler for tree ring

The first known use of tree ring was in 1919

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