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pollen

Diagram from the paper.
Posted inEditors' Highlights

Simulating the Journey of Pollen in the Atmosphere

by Jiwen Fan 19 June 202314 June 2023

A new study couples an emission and transport scheme of pollen from vegetation, and explores pollen’s evolution in different atmospheric conditions and its impacts on clouds and precipitation.

Photograph of a rocky hillslope with two people sitting at the top, in the distance.
Posted inNews

UV Radiation Contributed to Earth’s Biggest Mass Extinction

Rachel Fritts, Science Writer by Rachel Fritts 10 February 202327 February 2023

To find the first direct evidence of heightened UV radiation during the end-Permian mass extinction, researchers turned to chemical evidence preserved in pollen grains.

Illustration of the Giza pyramids, one under construction, along the Nile.
Posted inNews

Ancient Nile Tributary May Have Aided Pyramid Construction

by Jennifer Schmidt 6 October 20227 February 2023

Pollen from sediment cores shows that a now dry channel cutting through Giza was once a flowing waterway that Egyptian pyramid builders could have used to transport supplies.

Fiona Lo presenting her Ph.D. thesis at the American Meteorological Society annual conference.
Posted inFeatures

Fiona Lo: A “Really Long, Convoluted Path” to Health

Richard Sima, freelance science writer by Richard J. Sima 25 July 20227 February 2023

Lo uses her background in atmospheric sciences to forecast pollen concentrations.

Photo and illustration of leaves from the Paleocene era with bites left by insects
Posted inNews

Chicxulub Impact Changed Tropical Rain Forest Biodiversity Forever

by Humberto Basilio 3 May 20217 February 2023

Sixty-six million years ago, an asteroid reset most of life on Earth. But without this catastrophic event, the composition of neotropical rain forests wouldn’t be the same.

Cave entrance with vegetation in background
Posted inNews

Bat Guano Traces Changes in Agriculture and Hurricane Activity

Katherine Kornei, Science Writer by Katherine Kornei 13 October 202010 March 2023

Researchers hiked and rappeled into two caves in Jamaica to collect over 40 kilograms of excrement.

Close-up of a woman blowing her nose while standing in front of a field of flowers
Posted inScience Updates

Eyes in the Sky Improve Pollen Tracking

by G. R. Asrar, Y. Zhou, T. M. Crimmins and A. Sapkota 20 July 20207 February 2023

Physicians, public health officials, and experts in remote sensing and ecology recently met to identify ways that satellites, webcams, and crowdsourced science could help them manage asthma and allergies.

Pinyon pines and sagebrush above the basin of Baldwin Lake in the San Bernardino Mountains
Posted inResearch Spotlights

Southern California Climate Change over 100,000 Years

Kate Wheeling, freelance science writer by Kate Wheeling 11 February 20205 June 2023

Researchers used a sediment core from a lake in California’s San Bernardino Mountains to track the effect of climate on vegetation, fire, and erosion between about 120,000 and 15,000 years ago.

Brightly colored soil layers and a yardstick or ruler
Posted inNews

Looking for Prehistoric Pollen? Check the Floodplains

Mara Johnson-Groh, Science Writer by Mara Johnson-Groh 3 December 20197 February 2023

A new methodology calculates the soil properties most likely to preserve pollen.

A photograph of an Andean páramo that is awash in clouds.
Posted inNews

The Flickering Sky Islands

Lucas Joel by L. Joel 2 August 20197 February 2023

In the Andes, islands in the sky flicker, and evolution kicks into high gear.

Posts pagination

1 2 Older posts
A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

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