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CO2 emissions rise as natural sinks slow, but how can scientists precisely track this greenhouse gas, especially in advance of a potential global treaty to reduce its emissions?

The Earth’s oceans, which have absorbed carbon dioxide from fuel emissions since the dawn of the industrial era, have recently grown less efficient at sopping it up, new research suggests.

Tree ring expert Kevin Anchukaitis, of the tree ring lab at the Lamont-Doherty Earth Observatory, part of Columbia University's Earth Institute, talks about the information available in tree rings. And Colin Chartres, the director general of the International Water Management Institute, talks to Lynn Peeples about water issues.

The Copenhagen summit on climate change is looking less likely to produce a binding CO2 emissions reduction agreement as a new study finds that global carbon dioxide emissions increased 29 percent in the past nine years.

Ponds dug for fish rearing and storing water for agriculture in Bangladesh are a primary source of arsenic-contaminated drinking water which has caused widespread poisoning in the densely populated South Asian nation, according to a study released Sunday. Lamont-Doherty geochemist Lex van Geen comments on new study.

Robin Bell, Columbia University, Lake Vostok and Other Subglacial Lakes.

In late October, students and staff from the Lamont-Doherty Earth Observatory of Columbia University in New York set up four portable seismographs in in Carroll Township.

Wally Broecker, a climate expert at the Lamont-Doherty Earth Observatory at New York's Columbia University, says 480bn tonnes of carbon dioxide could be safely dumped in the deep Pacific in this way: the amount created by about 16 years of the world's current fossil fuel use.

An ancient evergreen tree reveals its secret life to scientists, helping them decode climate history.

Story on work in Asia and northern Canada by Lamont-Doherty dendrochronologist Brendan Buckley

Story on migratory-bird research in Alaska by Lamont-Doherty scientist Natalie Boelman

Slumgullion is one of hundreds of such slow-moving landslides around the globe, and Schulz says they all could be nudged by drops in atmospheric pressure as well. Such drops might even trigger earthquakes where stress has pushed the situation "close to the failure level," says seismologist Leonardo Seeber of the Lamont-Doherty Earth Observatory in Palisades, New York, who was not affiliated with the research.

Westchester County, New York news, real estate, classifieds, and much more., Yonkers, NY - Dr. Frank Nitsche, a scientist with Lamont-Doherty Earth Observatory, will present Secrets of the Deep on Saturday, November 21 at Beczak Environmenta

Includes interview with Lamont-Doherty scientist Michael Studinger

First Steps: Six million years ago, what set our ancestors on the path from ape to human? Lamont-Doherty scientist Peter deMenocal talks about the early origins of humans

One of a growing number of isolated remnants of Kilimanjaro ice spires, once full glaciers. Photos ( Global warming appears to be melting the ice on Tanzania’s Mt. Kilimanjaro.

People have changed the planet's climate, warming the atmosphere by churning out greenhouse gases. … "For very solid scientific reasons I am convinced that Ruddiman is dead wrong," wrote Wallace S. Broecker, …

Quotes Lamont-Doherty scientist Michael Studinger.

"The later you wait, it just gets progressively worse," said Mark Cane, a professor of earth and environmental sciences at Columbia...

Includes interview with Seismologist Paul Richards of the Lamont-Doherty Earth Observatory