Climate Change

The frigid seabottom off Antarctica holds a surprising riot of life: colorful carpets of sponges, starfish, sea cucumbers and many other soft, bottom-dwelling animals,shown on images from robotic submarines. Now, it appears that many such communities could fast disappear, due to warming climate.

During the last ice age, the Rhone Glacier was the dominant glacier in the Alps, covering a significant part of Switzerland. Over the next 11,500 years or so, the glacier, which forms the headwaters of the Rhone River, has been shrinking and growing again in response to shifts in climate.

Vintners in the Burgundy region of France have been tracking their harvests since the 14th century, and they know as well as anyone the importance of picking their grapes at just the right moment to produce the best possible glass of Pinot noir.

Columbia scientists have played a pioneering role in understanding climate change, from its potential effect on critical resources such as water and energy to finding ways vulnerable communities can better adapt.

Columbia University's the Record devotes its January 31, 2011 issue to climate matters, and Lamont-Doherty researchers feature prominently. 

Every day since Jan. 1, 1896, an observer has hiked up a grey outcrop of rock to a spot at The Mohonk Preserve, a resort and nature area some 90 miles north of New York City, to record daily temperature and other conditions there.

The United Nations has awarded Taro Takahashi, a geochemist at Lamont-Doherty Earth Observatory, its highest honor for environmental leadership, the Champions of the Earth award, for his research on the oceans’ uptake of carbon dioxide and its implications for global warming. He was presented with a trophy and a $40,000 prize on Thursday, April 22, in a ceremony in South Korea.

Since arriving at Lamont-Doherty Earth Observatory in 1952, for a college summer internship, Wally Broecker has come up with some of the most important ideas in modern climate science. He was one of the first researchers to recognize the potential for human-influenced climate change, and to testify before Congress about its dangers..

Natalie Boelman is an ecologist at Lamont-Doherty Earth Observatory who studies the effects of climate change on organisms throughout the food chain. She first visited the Alaskan Arctic in 2001, and will return to the North Slope this spring and summer to continue a wildfire-mapping project and to set up a field study that will look at how warming-induced changes are affecting migratory songbirds that breed on the tundra each summer.

Selected posts from a continuing series of essays and interviews from LDEO scientists on the prospects for a global climate-change treaty.

Training teachers to do science in the field or laboratory measurably increases the academic performance of their students and may have far-reaching economic benefits, according to a study published this week in the journal Science. The number of high school students passing New York State’s standardized tests, the Regents exams, is raised by as much as 10 percentage points if the teachers participated in Columbia University’s Summer Research Program for Science Teachers, the study found.

A new study of sea level fluctuations over the last 22,000 years is the latest to predict that rising seas could reach close to one meter by the end of this century, consistent with the most recent sea level projections made by the Intergovernmental Panel on Climate Change (IPCC).

But Global Warming May Have Helped Override Some Recent Eruptions

Climate researchers have shown that big volcanic eruptions over the past 450 years have temporarily cooled weather in the tropics—but suggest that such effects may have been masked in the 20^th century by rising global temperatures

Task Force, Advised by Columbia Scientists, Will Draw Plans to Battle Rising Seas, Strains on Water and Electricity

Much of New York City’s waterfront is projected to be vulnerable to flooding in coming decades.

 A study released on May 11, 2007 provides some of the first solid evidence that warming-induced changes in ocean circulation at the end of the last Ice Age caused vast quantities of ancient carbon dioxide to belch from the deep sea into the atmosphere. Scientists believe the carbon dioxide (CO2) releases helped propel the world into further warming.

Scientists from the Lamont Doherty Earth Observatory (LDEO) have provided new evidence that ocean circulation changes lagged behind, and were not the cause of, major climate changes at the beginning and end of the last ice age (short intervals known as glacial boundaries), according to a study published in the March 2005 issue of Science magazine.

For years, researchers have examined climate records indicating that millennial-scale climate cycles have linked the high latitudes of the Northern hemisphere and the subtropics of the North Pacific Ocean. What forces this linkage, however, has been a topic of considerable debate. Did the connection originate in the North Pacific with the sinking of oxygen-rich waters into the interior of the ocean during cool climate intervals, or did it originate in the subtropical Pacific with the transfer of heat between the ocean and the atmosphere?