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Northern Hemisphere

A layered tan-colored rock on a table with a ruler and quarter for scale.
Posted inNews

Wisconsin Stalagmite Records North American Warming

by Stacy Kish 6 April 20236 April 2023

A speleothem has revealed rapid periods of warming across the interior of the continent during the last glacial period, corresponding to similar events recorded in Greenland ice.

一只驼鹿站在山上,部分被灌木遮挡,背景是松树。
Posted inResearch Spotlights

驼鹿可以给森林地面降温

by Rebecca Dzombak 29 March 202329 March 2023

通过让砍伐整齐的森林变得斑驳,驼鹿在森林中创造出一个反射表面,可以反射阳光并降低温度。

Cross sections of several logged trees reveal banded patterns of dark and light wood
Posted inResearch Spotlights

Tree Ring Width Predicted by Machine Learning

by Morgan Rehnberg 28 March 202328 March 2023

When predicting a tree’s annual growth, consider the whole weather system and not just the sum of its parts.

A moose stands on a hill, partially occluded by shrubbery. Pine trees rise in the background.
Posted inResearch Spotlights

Munching Moose Cool Forest Floors

by Rebecca Dzombak 7 March 202329 March 2023

By making clear-cut forests patchier, moose create a reflective surface that bounces back sunlight and keeps temperatures down.

Evergreen trees below a snow-capped mountain range partially obscured by fog and clouds.
Posted inNews

Boreal Trees May Grow Faster Due to Climate Change

by Saima May Sidik 21 February 202321 February 2023

Enhanced tree growth could significantly offset carbon emissions, but some researchers say it’s not enough to compete with forest disturbances.

Maps overlain with prediction accuracy.
Posted inEditors' Highlights

Quantifying Changes in Midlatitude Subseasonal Prediction Skill

by Suzana Camargo 9 September 202230 September 2022

The differences between future and present subseasonal predictability in the Northern Hemisphere provided by the tropics are evaluated using neural networks.

A glacier cascades down the side of a mountain along the left side of this photograph. In the foreground is a shallow glacial lake that transitions from clear to icy blue and has numerous pebbles and smooth rocks strewn along the bottom. The sky is bright blue but shielded by low hanging clouds.
Posted inResearch Spotlights

Models Oversimplify How Melting Glaciers Deform Land

by Saima May Sidik 7 September 202228 September 2022

When glaciers melt, the land below deforms. Sea level data show that widely used models oversimplify the process.

Trends in stratospheric fluorine species during the period 2004-2018.
Posted inEditors' Highlights

New Insights on Stratospheric Circulation from Fluorine Tracers

by William J. Randel 23 November 20218 June 2022

Stratospheric fluorine species have accumulated faster in the Northern Hemisphere over the past two decades reflecting interhemispheric differences in the Brewer-Dobson transport circulation.

Posted inEditors' Highlights

Is Earth’s Albedo Symmetric Between the Hemispheres?

by Sarah Kang 11 August 202122 April 2022

The two hemispheres feature the same planetary albedo despite a larger land fraction in the north, because storms over the southern ocean are cloudier than their northern counterparts.

Posted inEditors' Highlights

High Climatic Response of High-Latitude Forests

Eric Davidson, president-elect of AGU by E. Davidson 1 December 20207 July 2022

The seasonal amplitude of atmospheric CO2 is increasing, partly due to boreal forest responses to warming. Photosynthesis and expansion of boreal forests are shown here to be temperature-limited.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
Geophysical Research Letters
“Neural Networks Map the Ebb and Flow of Tiny Ponds”
By Sarah Derouin

EDITORS' HIGHLIGHTS
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“Collaboration Helps Overcome Challenges in Air Quality Monitoring”
By Muki Haklay

EDITORS' VOX
Reviews of Geophysics
“What We Know and Don’t Know About Climate Tipping Elements”
By Seaver Wang

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