Lamont-Doherty Earth Observatory

While some of her friends spent the summer working in retail, Sylvia Pericles, a Staten Island high school student, was ankle-deep in a marsh in Piermont, N.Y. Some days were filled with the hard manual labor of chopping down an invasive reed that was overtaking the wetland.

Researchers lower plankton-sampling nets into northern waters. (Beth Stauffer/Lamont-Doherty Earth Observatory)

Researchers See Natural Cycle; But Questions Arise on Climate Change

Sean C. Solomon

Columbia University President Lee C. Bollinger and Provost John H. Coatsworth have named Sean C. Solomon to be director of Columbia’s Lamont-Doherty Earth Observatory.

James Zachos, a paleoceanographer at University of California, Santa Cruz, with a core of sediment from some 56 million years ago, when the oceans underwent acidification that could be an analog to ocean changes today. (Ira Block/National Geographic)

Few Parallels in 300-Million Year Geologic Record

Death Valley’s half-mile-wide Ubehebe Crater turns out to have been created 800 years ago—far more recently than generally thought.
(Brent Goehring/Lamont-Doherty Earth Observatory)

A Volcanic Explosion Crater May Have Future Potential

Researchers have traveled to the Alaskan treeline repeatedly. Lamont tree-ring scientist Kevin Anchukaitis (left) and Fairbanks arctic ecologist Angela Allen sample a dead spruce. Credit: Lamont-Doherty

Evergreen trees at the edge of Alaska’s tundra are growing faster, suggesting that at least some forests may be adapting to a rapidly warming climate, says

The retreat of Antarctica’s fast-flowing Thwaites Glacier is expected to speed up within 20 year

Variations in sea surface salinity influence the movement of seawater and heat around the globe. Credit: NASA

After less than a month in operation, a new NASA satellite has produced the first map showing how sal

Andrew Wessbecher (CC'12) and Jiyao Li (GSAS'15), a Columbia graduate student in earth and environment sciences, prepare to deploy seismic tools into the northern Pacific Ocean.

Image credit: Donna Shillington

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.

Pages