Glaciers

Southern Ocean Circulation and overturning

PI(s):

Arnold L. Gordon

The ring of deep water around Antarctica not only links the major ocean [Atlantic/Pacific/Indian] , but also produces dense waters along the continental margins of the frozen continent, which sinks

Website:

AnSlope: Cross-Slope Exchanges at the Antarctic Slope Front

Name	Title	Fields of interest
Aaron Putnam	Postdoctoral Research Scientist
Dorothy M. Peteet	Adjunct Senior Research Scientist	Paleoclimate, paleoecology, climate modeling, wetland carbon storage, palynology.
Göran Ekström	Professor	Göran Ekström's main research interest is global earthquake seismology. This includes the detailed study of individual earthquake ruptures, and the relationship between seismicity and the large scale tectonic deformation of the crust and mantle over geologic time. Prof. Ekström's teaching interests include Environmental Geology, in particular the science and policy aspects of the assessment and mitigation of Geologic Hazards.
Brent Goehring	Postdoctoral Research Scientist	Surface Exposure Dating, Glacial Geology, Paleoclimatology, Tectonic Geomorphology and Paleoseismology
Joerg M. Schaefer	Lamont Associate Research Professor

High-Arctic Heat Tops 1,800-Year High, Says Study

September 27, 2012

Summers on the Norwegian archipelago of Svalbard are now warmer than at any other time in the last 1,800 years, including during medieval times when parts of the northern hemisphere were as hot as, or hotter, than today, according to a new study in the journal Geology.
Cold Spell Gripped Europe 3,000 Years before “Little Ice Age,” Says Study

August 03, 2012

Human civilization arose during the relatively balmy climate of the last 10,000 years. Even so, evidence is accumulating that at least two cold spells gripped the northern hemisphere during this time, and that the cooling may have coincided with drought in the tropics. Emerging research on climate during this Holocene period suggests that temperature swings were more common than previously thought, and that climate changes happened on a broad, hemispheric scale.
Shrinking Glaciers: A Chronology of Climate Change

July 20, 2012

During the last ice age, glaciers dominated New Zealand’s Southern Alps until warming temperatures some 20,000 years ago sent them into retreat. Scientists at Lamont-Doherty Earth Observatory, with their colleagues, are investigating the rocky remnants these glaciers left behind to learn precisely when the ice withdrew, and what glacier retreats globally can tell us about the climate system. A new video produced by the American Museum of Natural History describes the process of surface exposure dating used to extract this information from glacial moraines.
When the World Ended in Ice

June 29, 2012

A mile or so of glacial ice covering much of North America and plowing down from the north once terminated in the New York metropolitan area, at a front stretching roughly from exit 13 on the New Jersey Turnpike (Rahway), on across southern Staten Island, the Bensonhurst neighborhood of Brooklyn, and northeastward through Long Island. But exactly when that ice started to seriously melt has long been an enigma.
Cold Spell May Have Gripped Europe 3,000 Years before its "Little Ice Age"

June 22, 2012

Human civilization arose during the relatively balmy climate of the last 10,000 years. Even so, evidence is accumulating that at least two cold spells gripped the northern hemisphere during this time, and that the cooling may have coincided with drought in the tropics. Emerging research on climate during this Holocene period suggests that temperature swings were more common than previously thought, and that climate changes happened on a broad, hemispheric scale.
Swiss Glacier Finely Tuned to Climate Changes

June 03, 2011

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.
Study Adds New Clue to How Last Ice Age Ended

September 08, 2010

As the last ice age was ending, about 13,000 years ago, a final blast of cold hit Europe, and for a thousand years or more, it felt like the ice age had returned. But oddly, despite bitter cold winters in the north, Antarctica was heating up. For the two decades since ice core records revealed that Europe was cooling at the same time Antarctica was warming over this thousand-year period, scientists have looked for an explanation.
Scientists to Reap Ice From Indonesia High Peak

May 28, 2010

After years of preparation, scientists are about to ascend Indonesia’s 4,884-meter (16,000-foot) Puncak Jaya, earth’s highest mountain between the Andes and the Himalayas, to drill samples of some of the last, fast-dwindling glacial ice in the tropics...
Glaciers Have Moved Together in Far-Flung Regions

September 23, 2009

A new study adds evidence that climate swings in Europe and North America during the last ice age were closely linked to changes in the tropics. The study, published this week in the journal Science, suggests that a prolonged cold spell...
Southern Glaciers Grow Out of Step With North

April 30, 2009

New Dating Technique Points to Differences Over 7,000 Years

The vast majority of the world’s glaciers are retreating as the planet gets warmer. But a few, including ones south of the equator, in South America and New Zealand, are inching forward. A new study in the journal Science puts this enigma in perspective.
Look at Glaciers Past Suggests Greenland Melting Could Rapidly Heighten Sea Level

September 04, 2008

North American Ice Sheet Dwindled Fast in Conditions Like Today's

In the face of warming climate, researchers have yet to agree on how much and how quickly melting of the Greenland ice sheet may contribute to sea level rise.
Lamont Scientists Develop New Technique to Study Long-Term Changes to the Earth's Surface

November 15, 2006

What’s in an isotope? Quite a lot, as it turns out. A new technique developed by researchers at the Lamont-Doherty Earth Observatory now allows scientists to use an isotope of manganese not abundant on Earth to understand the record of millions of years of changes to the Earth’s surface. According to the study's lead scientists, the new technique relies on measuring extremely small amounts of the nuclide that accumulates as cosmic rays strike exposed rock surfaces over long periods of time. This will allow scientists to track processes such as erosion and glaciation that shaped the landscape over millions of years.
New Study of Glacial Retreat Shows that Much of the World Emerged from Last Ice Age at Nearly the Same Time

June 08, 2006

The end of the recurring, 100,000-year glacial cycles is one of the most prominent and readily identifiable features in records of the Earth's recent climate history. Yet one of the most puzzling questions in climate science has been why different parts of the world, most notably Greenland, appear to have warmed at different times and at different rates after the end of the last Ice Age.
Glacial Earthquakes Point to Rising Temperatures in Greenland

March 23, 2006

Seismologists at Columbia University and Harvard University have found a new indicator that the Earth is warming: "glacial earthquakes" caused when the rivers of ice lurch unexpectedly and produce temblors as strong as magnitude 5.1 on the moment-magnitude scale, which is similar to the Richter scale. Glacial earthquakes in Greenland, the researchers found, are most common in July and August, and have more than doubled in number since 2002.


	Climate battles between the hemispheres during and since the last ice age: Palaeoclimate insights from the record of Earth’s mountain glaciers and drylands	Earth Science Colloquium
	Shrinking Glaciers: A Chronology of Climate Change
	Indonesia’s Last Glaciers	Images of glacier-capped Puncak Jaya