News and Events

  • September 10, 2012

    A city effort to clean up polluted Newtown Creek by aerating the water to boost oxygen levels is having an unintended effect: it is releasing sewage bacteria and other particles into the air above the site, researchers say in a new study in the journal Environmental Science and Technology. The researchers found bacteria types in the air consistent with the sewage and oil pollution in the creek. The study is one of the first to establish a link between water pollution and air-quality, raising new questions about the health risks posed by dirty water.

  • August 22, 2012

    Water is on the minds of Rockland residents this summer, and not just because of the record U.S. drought. Rockland County’s main water provider, United Water NY, wants to build a treatment plant on the Hudson River that would deliver more freshwater to Rockland taps. Some people are in favor of boosting supply to this growing suburban region, a short drive from the George Washington and Tappan Zee bridges. Others are opposed, citing the cost, in energy and dollars, plus the danger to fish and other wildlife. As the project awaits approval from the state Department of Environmental Conservation, a new debate on water consumption has emerged. Should people be encouraged, or even required, to use less? And if so, how?

  • August 21, 2012

    For six centuries, the ancient Maya flourished, with more than a hundred city-states scattered across what is now southern Mexico and northern Central America. Then, in A.D. 695, the collapse of several cities in present day Guatemala marked the start of the Classic Maya’s slow decline. Prolonged drought is thought to have played a role, but a study published this week in the journal Geophysical Research Letters adds a new twist: The Maya may have made the droughts worse by clearing away forests for cities and crops, making a naturally drying climate drier.

  • August 17, 2012

    Over the past 450 million years, life on earth has undergone at least five great extinctions, when biological activity nosedived and dominant groups of creatures disappeared. The final one (so far) was 65 million years ago, when it appears that a giant meteorite brought fires, shock waves and tsunamis, then drastically altered the climate. That killed off the dinosaurs, setting the stage for mammals–and eventually us–to evolve. 

  • 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.

  • July 24, 2012

    For the first time, scientists have identified tropical and subtropical species of marine protozoa living in the Arctic Ocean. Apparently, they traveled thousands of miles on Atlantic currents and ended up above Norway with an unusual—but naturally cyclic—pulse of warm water, not as a direct result of overall warming climate, say the researchers. On the other hand: arctic waters are warming rapidly, and such pulses are predicted to grow as global climate change causes shifts in long-distance currents. Thus, colleagues wonder if the exotic creatures offers a preview of climate-induced changes already overtaking the oceans and land, causing redistributions of species and shifts in ecology. The study, by a team from the United States, Norway and Russia, was just published in the British Journal of Micropalaeontology.

  • 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.

  • July 19, 2012

    Daehyun Kim, a climate scientist at Lamont-Doherty Earth Observatory, has been recognized for early-career achievement in the atmospheric sciences by the American Geophysical Union, the world’s largest earth-sciences organization. Kim, 32, came to Lamont as a postdoctoral researcher in 2010, where he has focused on investigating the Madden-Julian Oscillation, a little-understood weather pattern that typically forms in the Indian Ocean and brings heavy rains and hurricanes to many parts of the globe.

  • July 13, 2012

    With their vast resources and raw materials, the world’s oceans are one of the cornerstones of the quality of human life. According to World Bank figures, 350 million jobs are estimated to be linked to the oceans globally, and 1 billion people in developing countries depend on fish for their primary source of protein.

  • 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.
  • June 12, 2012

    Steep mountains produce some of the biggest landslides on earth but in such rugged terrain who’s around to notice? These monster backcountry slides are now gaining attention from far-away scientists, aided by a global network of seismic stations, earth-orbiting satellites and the crowd-sourcing power of the internet.

  • June 07, 2012
    An important piece of earthquake-science history popped up a few weeks ago on Jeopardy: “The Press-Ewing was an early seismograph, recording waves from these events.
     
    If you didn’t know a Press-Ewing from a French press, you were in luck. For $200, all you needed to know to formulate the question is what a seismograph measures.
     
    What is an Earthquake?
  • May 16, 2012

    A 500-foot rock face came crashing down from the Palisades cliffs along the Hudson River in Alpine, N.J. on Saturday night, shaking the ground for more than half a minute and dumping a fresh layer of boulders over a 100-yard strip of parkland below State Line Lookout. The shaking was strong enough to be registered by a seismic station a mile and a half away, at Columbia University’s Lamont-Doherty Earth Observatory, but no one was injured.

  • May 07, 2012

    Dendrochronologist Brendan Buckley’s usual occupation is drilling straw-like cores from old trees and extracting information about past climates by studying their rings. To extend the record beyond the time of living trees, he sometimes takes samples from long-dead trees, or even from timbers in ancient buildings. In 2010, the Lamont-Doherty Earth Observatory scientist was part of a team that traveled into the remote Cardamom Mountains of southern Cambodia to investigate human burials contained in coffins carved from entire logs.

  • May 01, 2012

    In an effort to understand how plants around the world will act in a warming climate, researchers have relied increasingly on experiments that measure how they respond to artificial warming. But a new study says that such experiments are underestimating potential advances in the timing of flowering and leafing four to eightfold, when compared with natural observations. As a result, species could change far more quickly than the experiments suggest, with major implications for water supplies, pollination of crops and ecosystems. The comparison, done by an interdisciplinary team from some 20 institutions in North America and Europe, appears this week in the leading journal Nature.

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