Category: Earth Sciences

Investigating Water Quality and Arsenic in Bangladesh

by | 7.30.2014 at 12:22pm
Joining PVC pipes during well installation

Postcard from the Field: Lamont-Doherty Earth Observatory graduate student Rajib Mozumder, who works with Lamont scientists Lex van Geen and Ben Bostick, has spent part of his summer drilling water wells and collecting samples in Bangladesh.

A ‘Bumper-Car’ Ride in the Ice Mélange

by | 7.29.2014 at 10:28am
Glacier in front of Alison Iceberg (Photo M. Turrin)

Today’s plan is to extend the sampling to include a wider region of the water exchange between Alison (Nanatakavsaup), the surrounding ocean and the connection to Hayes glacier. At the Village Meeting we had queried the local fisherman about the iceberg exit pathways for both Alison and Hayes to confirm or correct information we have gleaned from satellite imagery.

World Trade Center Ship Traced to Colonial-Era Philadelphia

by | 7.28.2014 at 8:57am
The ship was identified as a Hudson River Sloop, designed by New York’s first European settlers, the Dutch, to carry passengers and cargo in shallow, rocky waters.  In the 1970s, folk singer and activist Pete Seeger built a Hudson River Sloop replica named Clearwater, and used it as a platform to lobby for the removal of toxic PCBs and other pollutants from the Hudson. (Anthony Pepitone)

Four years ago this month, archeologists monitoring the excavation of the former World Trade Center site uncovered a ghostly surprise: the bones of an ancient sailing ship. In a new study, scientists at Lamont-Doherty Earth Observatory say that an old growth forest in the Philadelphia area supplied the white oak used in the ship’s frame, and that the trees were probably cut in 1773 or so—a few years before the bloody war that established America’s independence from Britain.

View from an Iceberg

by | 7.21.2014 at 12:13pm | 1 Comment
WeShouldGoHere_sm

The science goal for today is to complete 8 CTD casts. We load into our vessel, a Poca 500GR. We have discussed a 6 to 8 hour window of boat time with Gabriel the captain and Magnus our navigator and stocked up on 40 liters of benzene.

A Meeting for the Kullorsuaq Community

by | 7.19.2014 at 8:58pm
Iceberg_sm

It seems that many of the local fishermen have gone to hunt Narwal further north but there are several good prospects for boats that Søren will scout further as several of the fishermen are sleeping as the fishing is better right now at night. With 24 hours of daylight day or night fishing doesn’t really seem to matter.

‘Thumbs Up’ for Travel to Kullorsuaq

by | 7.17.2014 at 5:46pm
Landing at the Kullorsuaq ‘helipad’. The helipad is surrounded by canisters of gasoline used to refuel for the return leg. The local transport of luggage and gear is a front loader that delivers the gear to your door. (Photo M. Turrin)

At the small airport a smiling woman approaches us asking our plans in one word “Kullorsuaq?” We smile and nod and she grins broadly motioning that she and her daughter are going there too – it is their home she manages to convey.

The Son of a Hunter

by | 7.14.2014 at 10:36pm | 4 Comments
Greenland seal carving (Photo M. Turrin)

A visit to the Upernavik museum brought us to ‘Edvard’ a young Greenlandic and the local museum curator. Embracing the opportunity to practice his English he enthusiastically spent time sharing the historic art and past of the community and his experiences as a young adult growing up in a Greenland that is shifting from one set of cultural norms to another.

What Geology Has to Say About Global Warming

by | 7.11.2014 at 3:00pm
Cobscook Bay State Park, Maine. Photo: W. Menke

The most important lessons drawn from geology are that the earth’s climate can change radically, and rapidly. We can’t say precisely at what CO2 level we’re in danger of melting Antarctica, but that threshold could be reached in 150-300 years, if CO2 levels keep rising at the current rate.

Iron Fingerprints

by | 7.11.2014 at 1:20am
Jacques Descloitres, MODIS Rapid Response Team, NASA/GSFC (reposted from Nature.com)

Metals galore in deep Earth,
But at the sea surface, a dearth.
Iron is key
For greening the sea …
To planktic cells, gold has less worth.

Glacier Marks on Mount Chirripó

by | 7.9.2014 at 4:39pm
Max 7.2

On his sixth day on Mount Chirripo, Lamont’s Max Cunningham finds clues of the mountain’s origins and evolution.