Tree Ring Lab2
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New Way of Analyzing Tree Rings Confirms Unprecedented Central Asia Warming
Researchers have reconstructed temperatures in Mongolia all the way back to 1269 C.E., showing that recent temperatures are the warmest the region has seen in eight centuries.
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Rooftop Camera Will Track How Local Forests Change With the Climate
Installed on top of Lamont’s oceanography building, PhenoCam will help track how trees grow and change with the weather, seasons, and climate change.
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Rosanne D’Arrigo: Decoding The History of Climate Cycles, One Tree Ring At A Time
A simple fascination with winter and weather patterns led D’Arrigo to become a globe-trotting scientist who collects and analyzes important data from tree rings.
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Using Tree Ring Records to Decode Earth’s Climate History
An interview with Ed Cook, one of the founding directors of the Tree-Ring Laboratory at Lamont-Doherty Earth Observatory.
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Laia Andreu-Hayles Explores Tropical Forests in a Warming World
Research by tree-ring scientist Laia Andreu-Hayles will provide much-needed observational climate data for Bolivia and Peru and insight into the climate sensitivity of tropical tree species in the Andes.
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Park Williams Discovers History and Science in a Tree Ring
Park Williams studies trees and climate, in particular the causes of drought and the effects of climate change on forests. In this latest in a series of Earth Institute videos, we spoke to him about what he does, what’s important about it, and how his interest in history and environmental science blended into a career.
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Syria’s Drought Likely Its Most Severe in More than 900 Years
“If climate change is having an impact and is making droughts worse, then we should see this in the record over several centuries—and we do,” said the study’s author, Benjamin Cook.
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A New Global Team Tracks Temperature Change Through Time
A new international consortium of scientists is bringing the history of temperature fluctuations across the entire Northern Hemisphere to life.
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Translating Nature’s Historians: The Tree Ring Lab Turns 40
In its first 40 years, the Lamont Tree Ring Lab tracked changing climates around the world, building an international reputation as a global leader in research, training and technology.
AGU25, the premier Earth and space science conference, takes place December 15-19, 2025 in New Orleans, Louisiana. This year’s theme—Where Science Connects Us—puts in focus how science depends on connection, from the lab to the field to the ballot box. Once again, Lamont-Doherty Earth Observatory and Columbia Climate School scientists, experts, students, and educators are playing an active role, sharing our research and helping shape the future of our planet. #AGU25 Learn More
