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seasonal variability

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.

Nuns pose with a snowman at the Vatican in Rome on 26 February 2018.
Posted inResearch Spotlights

Using Multiple Models to Improve Seasonal Forecasting

by Terri Cook 15 April 201929 March 2022

The first study to examine the ability of a suite of general circulation models to predict sudden warmings in Earth’s stratosphere highlights the potential for improving Northern Hemisphere forecasts.

The Yenisei and Ob Rivers in Russia flow into the Kara Sea
Posted inResearch Spotlights

How Yellowing Seas Will Affect Ocean Temperatures

by E. Underwood 12 April 20191 February 2023

Materials that trap solar heat at the sea surface could cause more extreme temperatures.

Whitecaps dot a stormy sea
Posted inNews

Take Weather Prediction with a Grain of Salt and It Gets Better

Bas den Hond, Science Writer by Bas den Hond 12 April 201925 July 2022

Sea surface salinity is starting to rival other methods for seasonal rain forecasting.

Scientists in Arctic
Posted inNews

The Ice Nurseries of the Arctic Are Melting

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 11 April 20194 April 2023

Ice formed in coastal nurseries along Russia’s Arctic coast is melting before it can float far offshore. Scientists are worried about what that means for wildlife.

Posted inEditors' Highlights

A Step Closer to Quantifying Global Photosynthesis in Real Time

by Valeriy Ivanov 12 March 20197 July 2022

High spatial and temporal resolutions of a data set on a proxy for plant photosynthesis, as well as contiguous global coverage, have great utility for a variety of applications.

Cherry trees blossom near the Tidal Basin in Washington, D.C.
Posted inNews

Cherry Blossoms’ Peak Bloom Is an Indicator of Climate Change

by Randy Showstack 7 March 20194 April 2023

Projected peak bloom days are around the historic average this year, but experts say climate change is altering the long-term blooming schedule.

The view near McMurdo Station, Antarctica
Posted inResearch Spotlights

Observations Show Gravity Waves Above Antarctica Dance in Winter

by Terri Cook 5 February 20198 March 2022

Year-round observations show gravity waves above Antarctica exhibit seasonal patterns that peak in winter, which could help researchers trace the source of this mysterious phenomenon.

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

Drought Drove the Amazon’s 2023 Switch to a Carbon Source

25 February 202625 February 2026
Editors' Highlights

Tectonic Modifications Shape Surface Environment and Landscape

2 March 202626 February 2026
Editors' Vox

A Double-Edged Sword: The Global Oxychlorine Cycle on Mars

10 February 202610 February 2026
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