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seasonal variation

A research vessel next to Arctic ice
Posted inNews

Light Permeates Seasonally Through Arctic Sea Ice

Katherine Kornei, Science Writer by Katherine Kornei 6 September 201925 January 2023

The transmission of sunlight through Arctic sea ice depends on the presence of ice, snow, and melt ponds, data collected over 6 years reveal.

Phytoplankton under a scanning electron microscope
Posted inNews

Artificial Intelligence Can Spot Plankton from Space

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 6 September 20191 February 2023

Training an algorithm with satellite images of ocean color reveals the blooms and busts of phytoplankton communities.

An iceberg floating in Arctic waters
Posted inNews

July May Turn Out to Be the Hottest Month in Recorded History

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 9 August 201919 August 2022

If this year’s record-breaking trend continues, we’re on track for 2015–2019 to be the hottest 5 years on record.

Satellite image of Congolese rain forest with white clouds
Posted inNews

Congo Rain Forest Endures a Longer Dry Season

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 25 July 201929 April 2022

The forest’s dry season has been starting earlier and ending later for decades, making parts of it vulnerable to incursions by drought-resistant ecosystems.

An instrument with many sampling tubes is pulled out of the ocean at Station ALOHA. The samples will be analyzed for nutrient content, microbial diversity, and metabolic activity.
Posted inNews

Far-Flung Dust Storms Deliver Nutrient Boosts to North Pacific

Mary Caperton Morton, Science Writer by Mary Caperton Morton 22 July 20191 February 2023

Barren marine deserts bloom seasonally with iron infusions from Asian dust storms.

Illustration of observations of airglow collected by the International Space Station
Posted inResearch Spotlights

The When and Where of Mesospheric Bores Revealed

by David Shultz 17 July 201916 March 2023

In a new study, the enigmatic gravity waves were seen most frequently at equatorial latitudes and propagating from the winter to the summer hemisphere.

Haze over eastern Pennsylvania
Posted inResearch Spotlights

A New Look at Winter Air Quality in the Northeastern U.S.

by E. Underwood 9 May 201913 February 2023

Past studies underestimated a major pollution source, particularly in rural areas.

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.

An almond orchard with trees in bloom
Posted inNews

California Heat Waves Triggered by Pacific Thunderstorms

Mary Caperton Morton, Science Writer by Mary Caperton Morton 29 April 201930 March 2023

New link may offer 5-week lead time on predicting extreme heat in California’s fruit belt.

Scientists collect water samples in Antarctica.
Posted inResearch Spotlights

Antarctica’s Seasonal Streams Contribute Iron to the Ross Sea

by Terri Cook 22 April 201925 August 2022

Analysis of nutrient concentrations in four streams that discharge to the Southern Ocean indicates they are important sources of iron and phosphorous for coastal phytoplankton communities.

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