News and Events

  • August 19, 2015

    The New Jersey shoreline that sea birds wandered during the last ice age is about 90 miles east of today’s beaches, tens of meters beneath the sea floor. As the ice melted, sea level gradually rose and flooded the coastal terrain, and sedimentation carried out its relentless burial of things past.

    This summer, a group of scientists spent several weeks aboard the R/V Marcus G. Langseth looking into that past. Using sound waves, they collected data that will be used to build 3D images of the sediment beneath the ocean floor. They hope to be able to peel back layers of the 3D images to see how coastal landscapes responded to rising sea levels and hurricanes through history.

  • August 18, 2015

    In the D’Entrecasteaux Islands off Papua New Guinea, the rocks are giving rise to new ideas about the ways in which mountain chains form. A new scientific model inspired by data from the islands shows how the seemingly opposite processes of tectonic compression and extension can take place in the same region.  It also shows how sections of earth’s crust that have been pushed deep under the surface can reverse course and rise in what in the geological time scale would be an instant. The model has implications for the understanding of how many mountain belts form.

  • August 17, 2015

    If you’re ever lost in a marsh and need to build a battery that can power LED lights, these teens can help you out. They can show you how to track the flow of nutrients into and out of a marsh, and how to take sediment samples and analyze them for carbon, methane or metals. They can also show you how to rehabilitate a marsh that has been overrun by invasive species – they just spent the summer working with scientists at Lamont-Doherty Earth Observatory and Piermont Marsh putting all of these projects and their own hypotheses to the test.

  • August 11, 2015

    Dennis E. Hayes was a marine geophysicist who advanced mapping of the world’s ocean floors over five decades at Lamont-Doherty Earth Observatory. He died Aug. 6 at the age of 86.

     

  • August 10, 2015
    In his new book The Disaster Profiteers, Lamont-Doherty professor John Mutter argues that natural disasters can devastate the poor – while the rich may profit.

     

  • August 05, 2015

    It is only recently that scientists learned of the existence of glacial earthquakes–measurable seismic rumblings produced as massive chunks fall off the fronts of advancing glaciers into the ocean. In Greenland, these quakes have grown sevenfold over the last two decades and they are advancing northward, suggesting that ice loss is increasing as climate warms. But exactly what drives the quakes has been poorly understood. Now, a new study elucidating the quakes’ mechanics may give scientists a way to measure ice loss remotely, and thus refine predictions of future sea-level rise. The study appears this week in the early online edition of the leading journal Science.

  • July 17, 2015

    The climate over the tropical Pacific is in an extreme state at the moment. That explains some of the extreme anomalies affecting the United States right now. It also gives us a window through which we can glimpse how even more dramatic and long-term climates of the distant past might have worked, and – in the most radical scenarios, unlikely but impossible to rule out entirely – how much more extreme future climate changes could occur.

  • July 16, 2015

    People living in areas of Pennsylvania where hydraulic fracturing is booming are suffering increasing rates of hospitalization, a new study says. The study is one of a small but growing number suggesting that the practice could be affecting human health. It appears this week in the scientific journal PLOS ONE.

  • July 13, 2015

    International health experts have called it the largest mass poisoning in history, and it is still underway. Some 100 million people in southeast Asia have been drinking from shallow wells originally drilled to provide germ-free water; but many turned out to be contaminated with naturally occurring arsenic.

  • July 01, 2015

    Stephen Sparks, one of the world’s foremost experts on volcanoes, received the Vetlesen Prize for his groundbreaking scientific work at a ceremony held June 24 at Columbia University. Two-hundred-fifty people attended the formal gathering in the Low Library Rotunda.

  • June 11, 2015

    A new study of tree rings from Mongolia dating back more than 1,000 years confirms that recent warming in central Asia has no parallel in any known record. In recent decades, temperatures have been ascending more rapidly here than in much of the world, but scientists have lacked much evidence to put the trend into a long-term context. The study does not explicitly raise the issue of human-induced warming, but is sure to be seen as one more piece of evidence that it is at work. The study appears in the journal Quaternary Science Reviews.

  • June 11, 2015

    Climate change has become fertile ground for both scientists and artists, with its potential to reshape landscapes as well as human civilization itself.

    Two women investigating climate change from different perspectives—Christine McCarthy, a geophysicist at Lamont-Doherty Earth Observatory, and Denise Iris, a multimedia artist from Brooklyn—had a chance to spend several days together recently. In the Rock Mechanics Lab at Lamont, where McCarthy works, and a nearby “cold room” chilled to the climate of an industrial freezer, they exchanged notes on two ways of looking at ice.

  • May 26, 2015

    H. James Simpson, a geochemist who pioneered important studies of water pollutants in the Hudson River and abroad, died May 10. He had been affiliated with Columbia University’s Lamont-Doherty Earth Observatory for 50 years. The cause was Parkinson’s disease, said his family; he was 72.

  • May 20, 2015

    Scientists working in the desert badlands of northwestern Kenya have found stone tools dating back 3.3 million years, long before the advent of modern humans, and by far the oldest such artifacts yet discovered. The tools, whose makers may or may not have been some sort of human ancestor, push the known date of such tools back by 700,000 years; they also may challenge the notion that our own most direct ancestors were the first to bang two rocks together to create a new technology.

  • May 20, 2015

    Since the late 1990s, global warming has stabilized, even as greenhouse gases have risen. That defies simple models that say the temperature should keep going up. Many scientists think the so-called “hiatus” is taking place in part because much of the heat trapped in the atmosphere by greenhouse gases is being soaked up and stored by the oceans–at least for now. The Pacific is believed to play an especially powerful role, with winds in its eastern regions sweeping heat into its depths, like dirt getting swept under the rug. The problem is, scientists checking under the rug by measuring subsurface temperatures have not necessarily found the predicted increases in heat. This has come to be known as the riddle of the “missing heat.” A team of oceanographers now says they know where it went: It has been exported from the Pacific to the Indian Ocean. Their study, out this week in the journal Nature Geoscience, finds that this movement may account for more than 70 percent of all heat absorbed by the entire upper world ocean in the past decade.

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