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dendrochronology

Chart showing mercury stable isotope concentrations in tree rings
Posted inEditors' Highlights

Trees Are Watching Us and Our Actions

by Ankur R. Desai 31 March 20205 May 2022

Annual growth rings in trees tell us more than climate history; they can also document the rise and fall of human industrial activities.

Man in a wetsuit holds a cross section of a tree while standing in a lake.
Posted inNews

How the Cold Climate Shaped Scotland’s Political Climate

by Richard J. Sima 4 February 202015 October 2021

Tree rings reveal how severe cold and political isolation brought disaster to Scotland, inspired a colonization effort in Panama, and helped drive union with England.

A man uses a tool to extract a tiny sample of a construction timber in a wooden roof.
Posted inNews

Podcast: Discovering Europe’s History Through Its Timbers

by N. Bompey 27 January 202022 November 2021

An analysis of timber used to construct buildings in Europe hundreds of years ago is giving scientists and historians new insights into the region’s history from the 13th to 17th centuries.

Posted inNews

North Carolina Bald Cypress Tree Is at Least 2,674 Years Old

by R. Crowell 11 June 201915 October 2021

Researchers say it’s the oldest-known living tree in eastern North America. If it hadn’t been protected, it could have ended up as garden mulch.

Lake Tahoe with low water level
Posted inNews

Burning Fossil Fuels Worsens Drought

by Jenessa Duncombe 1 May 201928 September 2021

Tree rings help scientists trace the influence of greenhouse gas emissions on 20th-century drought conditions.

The moon rises behind a tree in the Ancient Bristlecone Pine Forest in California
Posted inResearch Spotlights

Topography and Microclimate Shape Tree Ring Growth

by Aaron Sidder 25 March 201915 October 2021

Wizened bristlecone pines in California reveal past climate trends, and new research shows how slight variations in landscape position drive different growth patterns in trees’ annual rings.

German warship Tirpitz at anchor in Alta Fjord, protected by antitorpedo nets, in northern Norway during 1943–1944.
Posted inNews

Tree Rings Tell a Tale of Wartime Privations

by Bas den Hond 11 April 20184 October 2021

In occupied Norway during World War II, the German navy deployed thick chemical fog to protect a precious battleship. The effects are still detectable in trees.

Researchers trace the impact of severe storms through tree ring growth patterns in coastal forests
Posted inResearch Spotlights

Impact of Hurricanes and Nor’easters on Coastal Forests

by S. Witman 3 April 2018

Scientists trace severe storms’ effects through tree ring growth patterns.

Posted inResearch Spotlights

California's 2012–2014 Drought Unusual for Last Millennium

by P. Kollipara 3 April 201521 October 2021

Soil moisture estimates, inferred from thousands of tree rings spanning the past 12 centuries, highlight the severity of the recent record-breaking drought.

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