LDEO Research Blogs

  • The U.S. GEOTRACES program launches into the Arctic Ocean as part of a multi-nation, multiple ice-breaker effort to study marine trace elements. Trace elements play two opposing roles in the ocean, as both essential nutrients (iron, zinc, cobalt) and as toxins (arsenic, copper) affecting biologic productivity and carbon cycling. Studying these elements in the Arctic marine system can help us understand the biogeochemical responses to rapid climate change. Lamont-Doherty geochemist Tim Kenna is on the U.S. team, aboard the USCG Cutter Healy research icebreaker.

  • At the base of the polar food chain in the icy waters off Antarctica, phytoplankton are an essential food source for young krill, which in turn sustain many species of marine wildlife. Jeff Bowman is in Antarctica for the field season studying how phytoplankton and bacteria interact, particularly their cooperative interactions. Toxic compounds produced by phytoplankton, for example, may be cleaned up by bacterial partners, allowing photosynthesis to proceed more efficiently, ultimately meaning more food in the food web.

  • As volcanologists at Lamont-Doherty Earth Observatory, we love everything lava. Right now, we’re exploring how the structure of the surfaces lava flows over influences how it advances. Does it matter if the lava is flowing on loose sand or solid rocks? On a road or a grassy field or into a forest?

    We headed to the “Volcanologists’ Disneyland” — also known as Iceland — to find out.

  • The U.S. GEOTRACES program launches into the Arctic Ocean as part of a multi-nation, multiple ice-breaker effort to study marine trace elements. Trace elements play two opposing roles in the ocean, as both essential nutrients (iron, zinc, cobalt) and as toxins (arsenic, copper) affecting biologic productivity and carbon cycling. Studying these elements in the Arctic marine system can help us understand the biogeochemical responses to rapid climate change. Lamont-Doherty geochemist Tim Kenna is on the U.S. team, aboard the USCG Cutter Healy research icebreaker.

  • Driven by processes in the deep earth over millions of years, the East African Rift is slowly tearing the continent apart, producing earthquakes and volcanoes along its 2,400-mile track. A scientific team including Donna Shillington, James Gaherty and Cornelia Class of Columbia University’s Lamont-Doherty Earth Observatory is working in Malawi and Tanzania to understand the causes, the long-term evolution, and the real-time hazards.

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