Up to now, it has been a mystery why much of the fresh water resulting from the melting of Antarctic ice shelves ends up in the depths instead of floating above saltier, denser ocean waters. Scientists working along one major ice shelf believe they have found the answer.
Rainfall patterns in the Sahara during the six-thousand-year “Green Sahara” period have been revealed by analyzing marine sediments, according to new research.
James Hansen, director of the Program on Climate Science, Awareness and Solutions at the Earth Institute and former director of the NASA Goddard Institute for Space Studies, is being honored with the BBVA Foundation Frontiers of Knowledge Award in Climate Change.
This spring, The Earth Institute is offering students opportunities to work as interns within various departments and research centers at the institute. All full-time Columbia and Barnard students are eligible to apply.
Due to warming climate and increasing human exploitation, far northern forests and the tundra beyond are undergoing rapid changes. In northern Alaska, scientists from Columbia University’s Lamont-Doherty Earth Observatory and other institutions are studying the responses of trees at the very edge of their range.
In northern Alaska’s Brooks Range, the earth as most of us know it comes to an end. The northern tree line-a boundary that circles all of earth’s northern landmasses for more than 8,300 miles, and forms the planet’s biggest ecological transition zone–runs through here. Scientists from Columbia University’s Lamont-Doherty Earth Observatory are studying how climate may change it, and the tundra beyond.
The New York Times reported on a new international agreement that will phase out hydrofluorocarbons, or HFCs, a chemical that is used in refrigerators and air conditioners that is a powerful greenhouse gas. The irony is that HFCs were developed to replace chlorofluorocarbons, or CFCs, chemicals that caused a hole in our atmosphere’s ozone layer and were banned by the Montreal Protocol of 1987.
The Columbia Center on Sustainable Investment’s conference of early November will consider, notably, how world production of oil and gas could be significantly reduced in manners protecting the interests of lower-income producing countries, given that staying on carbon budget will require leaving two thirds of our fossil fuel reserves unburnt.
2016 was a hot year for climate change shareholder resolutions hitting the boardrooms of oil and gas companies. Although more familiar climate news headlines have carried calls to “keep it in the ground” and divest investment portfolios from fossil fuels, a patient strategy has been quietly gaining momentum: shareholder engagement on climate change.
Indigenous peoples and other communities hold and manage 50 to 65 percent of the world’s land, yet governments recognize only 10 percent as legally belonging to these groups, with another 8 percent designated by governments for communities. That’s bad economic policy.