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proxies

An ancient pine perched on top of a rock outcrop
Posted inNews

Tree Rings Record 19th-Century Anthropogenic Climate Change

Mary Caperton Morton, Science Writer by Mary Caperton Morton 8 May 20194 April 2023

Paleoclimate records, observational data, and climate modeling capture the influence of human activity on temperature seasonality.

A horizon on the ocean
Posted inNews

Ice Drove Past Indo-Pacific Climate Variance

Sarah Derouin, Science Writer by Sarah Derouin 2 April 20192 March 2023

Researchers used both terrestrial and marine proxy data to reconstruct the dramatic and dynamic climatic changes.

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

Topography and Microclimate Shape Tree Ring Growth

Aaron Sidder, freelance science writer 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.

An excavation conducted at an Adélie penguin colony on Earle Island (one of theDanger Islands), Antarctica.
Posted inNews

Penguin Poop Keeps a Record of Antarctic Glaciation

by B. Bedford 11 December 20184 October 2021

Scientists are digging up Adélie penguin guano to study millennia of Antarctica’s history.

Neanderthal and human skull
Posted inNews

Neanderthals Likely Ate Rotten Meat

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 10 December 201821 July 2022

Neanderthals have long been painted as meat-eating machines. But could a new look at a dietary proxy and how it changes when meat rots uncover insights into what these extinct hominids really ate?

Researchers look to bacterial DNA to understand river flow.
Posted inResearch Spotlights

Using Microbes to Predict the Flow of Arctic Rivers

by E. Underwood 15 May 20184 January 2023

Bacterial DNA provides a good estimate of river discharge.

Marine mollusk shells record the magnitude of the radiocarbon marine reservoir effect in their habitat.
Posted inEditors' Vox

Radiocarbon in the Oceans

by E. Q. Alves 17 April 201827 January 2022

Offsets in radiocarbon concentration within the ocean or between the ocean and the atmosphere are particularly useful proxies for a variety of studies.

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

Bas den Hond, Science Writer 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.

A coral reef in the northern Red Sea has massive Porites colonies that are often used in paleoclimate research.
Posted inScience Updates

Reconstructing Climate and Environment from Coral Archives

by J. Zinke, M. Pfeiffer and T. Felis 9 April 20188 March 2022

Tropical Coral Archives—Reconstructions of Climate and Environment Beyond the Instrumental Record at Society-Relevant Timescales; Bremen, Germany, 28 September 2017

Roman aqueduct
Posted inFeatures

Five Weird Archives That Scientists Use to Study Past Climates

JoAnna Wendel, freelance science writer and illustratorMohi Kumar headshot by JoAnna Wendel and M. Kumar 30 March 20184 October 2021

When tree rings, ice cores, and cave formations can’t cut it, try your luck with whale earwax or bat poop.

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