Climate

A recent slowdown in global warming has led some skeptics to renew their claims that industrial carbon emissions are not causing a century-long rise in Earth’s surface temperatures.

When scientists talk about climate change, they usually mean significant changes in the measures of climate over several decades or longer. Climate variability generally refers to seasonal changes over a year or so.

Michael Levi of the Council on Foreign Relations, Gavin Schmidt of Goddard Institute for Space Studies and Mike Hulme of University of East Anglia at the Hertog Global Strategy Initiative.

As the average local temperature continues to rise, climate change is a major topic on campus this summer. It is the focus of the Hertog Global Strategy Initiative, an annual interdisciplinary program that uses historical analysis to examine problems in world politics.

Extreme weather can wreak havoc on cities and their economies. Damage from hurricanes Katrina and Sandy is estimated at more than $150 billion and over $60 billion, respectively.

Researchers at Columbia Engineering and Georgia Institute of Technology have published a study in the February 4 online Early Edition of Proceedings of the National Academy of Sciences (PNAS) showing—for the first time—that certain volatile organic gases can promote cloud formatio

The National Oceanic and Atmospheric Administration officially designated 2012 as the warmest year on record for the contiguous United States. This isn't too surprising for a year that already had the warmest spring, the second warmest summer and fourth warmest winter.

Solomon led efforts to identify the cause of the ozone hole over Antarctica.

An American atmospheric chemist who led efforts to identify the cause of the Antarctic ozone hole and a French geochemist who extracted the longest-yet climate record from polar ice cores have won the prestigious 2012 Vetlesen Prize.

Columbia’s campuses were largely spared the ravages of Hurricane Sandy, which destroyed neighborhoods, flooded tunnels, forced hospitals evacuations and knocked out power to millions throughout the region. But many in the tri-state area face a challenging path to recovery.

Researchers lower plankton-sampling nets into northern waters. (Beth Stauffer/Lamont-Doherty Earth Observatory)

Researchers See Natural Cycle; But Questions Arise on Climate Change

Eliminating leaks from energy-producing facilities would remove large amounts of the greenhouse gas methane from the air. Here, natural gas explodes from a pipe in Middletown, Conn., January 2010
(U.S. Chemical Safety Board)

Reducing Soot and Methane Would Bring Fast Results, Says Study

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