Earth Institute

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.

During Europe’s 2003 heat wave, July temperatures in France were as much as 18 degrees F hotter than in 2001. (NASA)

Fueled by industrial greenhouse gas emissions, Earth’s climate warmed more between 1971 and 2000 than during any other three-decade interval in the last 1,400 years, according to new regional temperature reconstructions covering all seven continents.

The Jan. 14 launch event featured panel discussions on the impacts of media on democracy and sustainable development in the region.

Columbia and Columbians have long been working across many regions in Africa, from the Mailman School’s leadership of AIDS/HIV programs and the Earth Institute’s research on sustainable development to the many scholars of African history and politics, culture and society.

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.

Daniel Hillel reviews "Handbook of Climate Change and Agroecosystems," which he co-edited with Cynthia Rosenzweig Image credit: Kevin Krajick

Born during the Great Depression, Daniel Hillel moved to Palestine as a child and settled with his family on a kibbutz, where he learned firsthand the difficulty of rehabilitating degraded land.

Daniel Hillel

Daniel Hillel, an adjunct senior scientist at Columbia University’s Earth Institute, has been awarded the World Food Prize for his work in conceiving and promoting water-saving methods that have increased crop production on arid lands in 30 countries.

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

Street flooding that occurred during Hurricane Irene could become more common in the decades ahead.
Credit: Reuters

In the first statewide climate change outlook for New York, scientists say that the state may suffer disproportionate effects in coming decades compared with other regions, due

Early humans were using stone hand axes as far back as 1.8 million years ago. Credit: Pierre-Jean Texier, National Center of Scientific Research, France.

A new study suggests that Homo erectus, a precursor to modern humans, was using advanced tool-making methods in East Africa 1.8 million years ago, at least 300,000 years earlier than previously thought.

The long war leading to South Sudan's recent independence began during the powerful El Niño drought of 1983. In continuing hostilities, southern fighters display a grenade launcher captured from northern Sudanese, July 2011.
(Trevor Snapp/Global Post)

In the first study of its kind, researchers have linked a natural global climate cycle to periodic increases in warfare.

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