LDEO Research Blogs

  • Trees have stories to tell, their annual growth rings cataloging changes in the environment, including climate. Many tree-ring scientists focus on conifers, but Neil Pederson, a scientist at Lamont-Doherty Earth Observatory, believes that the less-studied broadleaf trees in temperate forests, such as magnolia, tulip-poplar, maple and birch, have much to teach us.

  • A major tectonic boundary on the seafloor off Alaska has produced fatal earthquakes and tsunamis similar to the recent one in Japan. In 1964, the second largest quake ever recorded happened here, and other parts of the fault may be building energy for another event. Scientists from <a href="./>Lamont-Doherty Earth Observatory</a> are aboard the research vessel <a data-cke-saved-href=" res="" fac="" omo="" index.html"="">Marcus G. Langseth to better understand what causes these quakes, which will help assess the hazard for Alaska and beyond. Follow Lamont seismologist Donna Shillington from the field.

  • From the Himalayas to the Alps and Rockies, mountain glaciers are rapidly melting. A sign of a warming climate, their retreat may also threaten hydropower and water supplies for cities below. To put current trends in context, scientists at Columbia's Lamont-Doherty Earth Observatory are studying rocks that record the ebb and flow of ice since the last ice age, over the past 20,000 years. They will travel the high peaks of the Peruvian Andes, including Nevado Coropuna, a 22,000 foot volcano. Other scientists will study pre-Columbian remains on the mountains. Geologist Gordon Bromley reports from Peru, while geochemist Gisela Winckler writes from the Lamont campus.

  • Volcanic eruptions and earthquakes shake southern Italy frequently, as they have for 12 million years. In that time, tectonic movement has split Calabria--the "toe" of the Italian boot--from what are today the islands of Sardinia and Corsica to the west, and formed mountain ranges. As part of the international Calabrian Arc Project, Lamont-Doherty scientists Nano Seeber and Meg Reitz are traversing Calabria to examine rocks and study the terrain to better understand this complex and violent history. Read about their work here.

Pages