Lamont-Doherty Earth Observatory178
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Scientists Respond to Earthquakes in Malawi
In December, nearly a dozen earthquakes of magnitude 5 or greater rattled the southeast African nation of Malawi, killing four, injuring hundreds, and making thousands homeless. The region had been calm for decades, so the earthquakes caught everyone by surprise. But aftershocks continue, and more quakes can be expected. Seismologists from Columbia University’s Lamont-Doherty Earth…
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Melting Glaciers–Tracking Their Path
I am a geophysicist at Columbia’s Lamont-Doherty Earth Observatory, and I study how different processes shape the bottom of oceans and rivers. One focus of my research is the continental shelves off Antarctica, especially in the Bellingshausen and Amundsen Sea, and the role of ice sheets in their formation. I made my first trip to…
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What’s Making West Antarctica Melt?
The view from the Palmer is so blindingly white today that the eye cannot tell where the ice ends and the clouds begin. In this unusually icy Antarctic summer, it seems strange to contemplate melting ice. But glaciers, here and in Greenland, are melting faster than they are growing. We know that ice sheets have…
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Tundra, Microbes and World Climate
O. Roger Anderson is a microbiologist at Lamont-Doherty Earth Observatory who studies bacteria, amoebas, fungi and other microorganisms. Lately he has been thinking about how tiny organisms that inhabit the vast northern tundra regions could contribute to changing climate, since, like humans, they breathe in oxygen and breathe out carbon dioxide. Recently, Anderson found a…
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Haiti: Physics of Quakes Past, and Future
The earthquake that struck Haiti took place along what is called a strike-slip fault—a place where tectonic plates on each side of a fault line are moving horizontally in opposite directions, like hands rubbing together. When these plates lock together, stress builds; eventually they slip; and this produces shaking. This quake was fairly shallow; it…
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Rough seas bring unexpected rewards
Working in Antarctica is always a challenge but this trip has had more than the usual setbacks. After working feverishly in Punta Arenas to prepare our ship, we had to wait two days for some essential cargo to arrive. Not long after pushing off, we encountered rough weather in the Drake Passage, a region notorious…
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Adelie penguins
The nice folks up on the bridge always give us a call when they see wildlife. Then we all grab our cameras and rush out to our favorite spots to try and photograph whatever creatures have come to visit. I’m no biologist, but seeing so many beautiful animals has made me curious. So I’ve been…
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Girls on Ice
While I’ve been staying on the ship, Erin Pettit has been flying off by helicopter to study glaciers. She has a really cool job, and I wish she would take me with her on some of her adventures. But it turns out that she wants to take you! Erin runs a program called Girls on…
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A Change in Plans
In 1914, Ernest Shackleton wrote “Pack-ice might be described as a gigantic and interminable jigsaw-puzzle devised by nature.” Shackleton was a great Antarctic explorer. He wanted to be the first to cross the continent of Antarctica, but his expedition ran into unexpectedly icy conditions. He is famous now, not for achieving his goal, but for…