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seasonal variability

Posted inFeatures

Improving Predictions of Arctic Sea Ice Extent

by J. Stroeve, Ed Blanchard-Wrigglesworth, V. Guemas, S. Howell, F. Massonnet and S. Tietsche 19 June 201523 March 2023

Scientists in the Sea Ice Prediction Network share and discuss their user-oriented forecasts of seasonal sea ice in a changing Arctic.

Posted inResearch Spotlights

Ozone Hole to Remain Large During Cold Years

by E. Betz 28 April 20153 June 2024

Despite the Montreal Protocol's success, it will take years of observations to be sure that regulations are allowing the ozone hole to recover.

Posted inResearch Spotlights

As Forests Age, Their Climate Effects Shift

by David Shultz 23 March 20159 March 2023

The amount of moisture transpired from leaves increases for some tree species but drops on average.

Posted inResearch Spotlights

Changing Patterns in U.S. Air Quality

by C. Schultz 18 February 201513 February 2023

Over the northeast United States, ground-level ozone will peak in the winter rather than the summer thanks to continued reductions of regional nitrogen oxide emissions from smokestacks and tailpipes.

Posted inResearch Spotlights

A New Level of Understanding for Coastal Aquifers

by E. Betz 4 February 201528 February 2024

New models of saltwater-freshwater mixing in coastal aquifers show how salinity varies throughout the year, with implications for what happens to groundwater pollutants before they reach the ocean.

Posted inResearch Spotlights

Circulation a Key Factor in Mediterranean Algal Growth

by J. Orwig 23 December 20146 June 2022

Scientists use satellite and robotic field data to study the environmental conditions driving phytoplankton blooms in the northwestern Mediterranean Sea.

Posted inNews

Holidays Really Do Light Up the Night

by H. Leifert 19 December 201410 September 2025

NASA and NOAA images reveal brighter than average December lights in the United States, brighter Ramadan nights in the Middle East.

Posted inNews

High Smog Levels Seen in Mecca During the Annual Pilgrimage

by J. Urton 18 December 201424 November 2025

Surveys of air quality show that smog and other pollutants in Islam’s holiest city during the Hajj are among the worst in the world, prompting the Saudi government to look for ways to clear the air.

Posted inNews

NOAA's Winter Outlook Favors Weak El Niño, Lower-Than-Average Precipitation

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 28 October 201416 February 2023

The National Atmospheric and Oceanic Association announces the upcoming weather projection for winter 2014-2015.

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Features from AGU Publications

Research Spotlights

Wintertime Spike in Oceanic Iron Levels Detected near Hawaii

11 December 202511 December 2025
Editors' Highlights

Frictional Properties of the Nankai Accretionary Prism

11 December 20259 December 2025
Editors' Vox

Hydrothermal Circulation and Its Impact on the Earth System

3 December 20253 December 2025
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