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proxies

Amanita thiersii mushrooms
Posted inResearch Spotlights

Mushrooms Could Provide a Record of Grassland History

Alexandra Branscombe by A. Branscombe 11 April 20174 October 2021

Scientists measured carbon isotopes in certain types of fungi to assess whether the organisms can track how climate change is affecting grasses.

Astronaut gathering samples.
Posted inNews

Biogenic Oxygen on the Moon Could Hold Secrets to Earth's Past

JoAnna Wendel, freelance science writer and illustratorMohi Kumar headshot by JoAnna Wendel and M. Kumar 30 January 201712 October 2022

Lunar orbiting data show that terrestrial oxygen rains down periodically on the Moon, enticing researchers with an opportunity to study Earth's ancient atmosphere.

Scientist with guano core.
Posted inNews

Bat Guano: A Possible New Source for Paleoclimate Reconstructions

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 14 December 20164 October 2021

Nitrogen isotopes within samples of bat excrement accurately reflect modern precipitation patterns. So could guano serve as a paleoclimate record?

white-moon-cave-santa-cruz-california
Posted inNews

Subterranean Caverns Hold Clues to Past Droughts

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 31 August 20167 March 2023

Cave formations offer highly resolved paleoclimate data that scientists plan to use to reconstruct California's ancient patterns of drought.

CSalar-Grande-Basin-Chile-rock-minerals-clues-to-carbon-cycle-life-on-Mars
Posted inResearch Spotlights

Rocks in Chile Help Scientists Hunt for Life on Mars

by M. McKinnon 9 August 201612 April 2022

Investigating oxalate minerals in the Atacama Desert provides a terrestrial analogue to test techniques that could be used to study the carbon cycle in the cold deserts of Mars.

18 July 2013 eruption of Sakurajima volcano in Japan.
Posted inResearch Spotlights

Japan's Volcanic History, Hidden Under the Sea

by W. Yan 24 June 20166 December 2021

Scientists investigate marine tephra layers for clues to Japan's volcanic past.

Posted inResearch Spotlights

Early Agriculture Has Kept Earth Warm for Millennia

Sarah Stanley, Science Writer by Sarah Stanley 19 January 201624 January 2024

Ice core data, archeological evidence, and other studies suggest humans had a significant influence on Earth's preindustrial climate.

Posted inScience Updates

High-Resolution Tools Advance Study of Paleoclimate Archives

by I. J. Orland, J. W. Valley and N. T. Kita 8 December 201525 March 2022

HiRes2015: High Resolution Proxies of Paleoclimate; Madison, Wisconsin, 31 May to 3 June 2015

Posted inResearch Spotlights

Correlating Monsoon Strength with Boron Isotopes

by C. Minnehan 19 October 20152 March 2023

Scientists tell the story of the past monsoon by measuring boron isotopes in organisms in the Arabian Sea.

Posted inResearch Spotlights

What Drove Sea Surface Temperature Change During the Pleistocene?

by J. Orwig 2 March 20153 July 2023

New information suggests that atmospheric carbon dioxide concentration was just one of the main drivers of warming sea surface temperatures in the Pleistocene.

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Understanding Flux, from the Wettest Ecosystems to the Driest

24 November 202524 November 2025
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Avoiding and Responding to Peak Groundwater

25 November 202525 November 2025
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Echoes From the Past: How Land Reclamation Slowly Modifies Coastal Environments

19 November 202519 November 2025
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