New observational constraints suggest that U.S. emissions of this heat-absorbing aerosol were 80% higher during the late 20th century than prior estimates have indicated.
Climate Change
Posted inEditors' Highlights
New Observations of Thunderstorm Updrafts and Downdrafts
Unique measurements of air motion within deep convective clouds offer new insights in our understanding of these storms and provide constraints for weather and climate prediction.
Posted inNews
House Freshman Democrats Urge Funds for Climate Change Programs
More than half of the newly elected Democratic representatives signed onto a letter calling for “robust funding” for U.S. climate change research programs.
Posted inNews
Global Tree Cover Loss Continues but Is Down from Peak Highs
New data show that an area of tropical tree forest cover the size of Nicaragua was lost in 2018.
Posted inNews
Atacama’s Past Rainfall Followed Pacific Sea Temperature
This is the first paleoclimate record of precipitation near Atacama’s hyperarid core and suggests that its moisture source is different from that of the Andes.
Posted inResearch Spotlights
Late Cretaceous Extreme Warmth at High Southern Latitudes
New proxy data indicate sea surface temperatures at high southern latitudes reached over 35°C during a period of extreme greenhouse climate that began about 100 million years ago.
Posted inResearch Spotlights
Antarctica’s Seasonal Streams Contribute Iron to the Ross Sea
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.
Posted inAGU News
Podcast: Celebrate Earth Day with Stories from AGU
Enjoy the wonders of our world with special episodes of AGU’s Third Pod from the Sun.
Posted inResearch Spotlights
Rising Methane Emissions Could Derail the Paris Agreement
A new study looks for the source of a spike in the potent greenhouse gas methane.
Posted inResearch Spotlights
Meeting User Requirements for Sea Level Rise Information
A new framework based on decision analysis can help scientists produce practical data that support informed decisions about climate adaptations.