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Nicolas Young: 2015 Blavatnik Awards for Post-Doctoral Scientists - New York Academy of Sciences

Featured News - 4 hours 37 min ago
Lamont-Doherty's Nicolas Young was named a winner of the 2015 Blavatnik Regional Awards, given to post-doctoral scientists and affiliated with the New York Academy of Sciences. “These talented young scientists will continue to foster innovation and new discoveries for years to come,” said Len Blavatnik, head of the Blavatnik Family Foundation.

Anatomy of an ‘Ice Station’

TRACES of Change in the Arctic - Sun, 10/11/2015 - 19:58
Moving equipment on and off the Healy for sampling requires organization. (photo T. Kenna)

Moving equipment on and off the Healy for sampling requires organization and creativity. (photo T. Kenna)

Completing an ‘Ice Station’ means collecting samples over a wide range of Arctic water and ice conditions. Each station means a major orchestration of people and resources. The teams gather, equipment is assembled, and the trek off the ship begins. After the first off ship exodus the sample teams are well practiced in moving equipment and setting up work areas so as not to interfere with the other stations. There is no shortage of space so spreading out is not a challenge!

Sampling on the ice also means being aware of your environment. A required component is the Polar Bear watch. Fortunately we have not seen a polar bear when out on the ice.

Sampling on the ice also means being aware of the environment,  requiring a polar bear watch. Fortunately the team has not seen a polar bear when out on the ice. (Photo T. Kenna)

Collecting a wide range of samples at multiple Arctic locations allows GEOTRACES to get an integrated look at the trace elements moving through the Arctic ocean ecosystem, and to better understand how these elements connect to the larger global ocean. Each is carefully collected. Whether the elements are ‘contaminants’ or essential nutrients there is a specific protocol in order to quantify the inputs without ‘dirtying’ the sample. It may seem odd to think of ‘dirtying’ something we label a contaminant, but in order to fully understand the concentrations and methods of transport for each element, every sample is handled with the same amount of care.

The following photo essay showcases the various ice/water sampling stations and reviews what is being collected at each.

Snow Samples: The snow collected at this station is being used in part to determine the presence/absence of contamination related to the March 11, 2011 Fukushima event.

Tim Kenna collecting a snow sample. The sample area is generally 1 or 2 square meters and collected down to the ice. (Photo B. Schmoker)

Tim Kenna collecting a snow sample. The sample area is generally 1 or 2 square meters , with the snow collected down to the ice surface below and carefully bagged. (Photo B. Schmoker)

Both the snow samples and the ice core sections will be analyzed and examined along with the information collected from seawater, suspended particulates, and bottom sediments, in order to better understand the influence of processes specific to the Arctic on the transport and distribution of several anthropogenic radionuclides.

Bagging up the snow from the snow station. Each sample is labeled by quadrant of ice collected. (Photo B. Schmoker)

Lamont’s Tim Kenna (r) and Wright State University graduate student Alison Agather (l) bag up snow. Each sample is carefully bagged and labeled by quadrant of ice collected. (Photo B. Schmoker)

Ice core samples: The ice cores are sections of sea ice, and again are being collected to determine the presence/absence of contamination related to Fukushima. In general the samplers were able to obtain 1.5 – 2 meters of ice in the cores.

Section of sea ice core collected by drilling into the ice. (Photo Cory Mendenhall, USCG)

Section of sea ice core collected by drilling into the ice. As the cores are collected they are photographed, labeled by sections, and ice properties were measured in situ prior to being taken back to the labs. (Photo Cory Mendenhall, USCG)

Melt Ponds: Surface melt ponds form on the sea ice in the long says of the Arctic summer. The warmth of the sun creates ponds that sit on top of the ice. The water collected in these ponds carries different properties than the either the sea ice from which it melted, or the ocean water from which the sea ice formed. Most often these ponds have a frozen surface layer that needs to be drilled through before water is pumped out for collection.

Surface Melt Pond Team collecting water sample. (Photo T. Kenna)

Surface Melt Pond Team collecting water sample. (Photo T. Kenna)

Beryllium-7 (7Be) Samples: Produced in the atmosphere when cosmic rays collide with nitrogen atoms, 7Be is constantly being added to the surface of the water, and therefore is a great surface water tracer.  With its very short half-life, ~ 53 days, 7Be can be used to track water parcel circulation as it moves between surface and deep water (which has no significant source of the 7Be isotope). The surface water pulls the 7Be with it as it moves down deeper into the ocean, allowing us to track and time the mixing process.

Pumping water through the hole drilled by auger. (photo B. Schmoker)

The Beryllium team first uses a gas powered auger to create a hole for a pump and a CTD instrument (used to measure salinity, temperature and depth)  to fit through. They then pump water through the hole for collection. Because beryllium is in very small amounts they pump thousands of liters of water from 3 or 4 depths. Each is pumped through big cartridges that absorb the Be. (photo B. Schmoker)

Dirty Ice Samples:  The dirty ice work is more opportunistic, and therefore is not be part of each ice station. If dirty ice is spotted it will be sampled, and while it may not be part of each ice station, it is part of the overall GEOTRACES protocol. While most of the stations sample for quantification, i.e. grams of sediment/ml ice, the dirty ice samples are used more for characterization, i.e. composition or mineralogy.  For Tim’s work the collection of dirty ice is used to look at sediments originating from continental shelves bordering the Arctic, with the goal of evaluating or characterizing dirty ice as a transport vector for anthropogenic radionuclides.

Tim sampling dirty ice. (photo C. Mendenhall).

Tim sampling dirty ice with a pick and bucket. (photo C. Mendenhall).

Minimal Processing of the samples collected at the stations will occur on the Healy. The snow and Ice gets melted and the seawater acidified. The focus of the trip is to collect as much material as possible. There will be plenty of time for processing when  the researchers are back at their home institutions.

Margie Turrin is blogging for Tim Kenna, who is reporting from the field as part of the Arctic GEOTRACES, a National Science Foundation-funded project.

For more on the GEOTRACES program, visit the website here.

The Horn Of Africa Is Rapidly Drying Due to Climate Change - International Business Times

Featured News - Fri, 10/09/2015 - 15:32
The already arid countries of Djibouti, Ethiopia and Somalia are becoming even drier at an unusually fast pace, threatening to deepen drought, famine and instability, a new study by Lamont-Doherty's Peter DeMenocal and former post-doc Jessica Tierney finds.

Scientists Predict Drier Horn of Africa as Climate Warms - Reuters

Featured News - Fri, 10/09/2015 - 14:56
The Horn of Africa is becoming drier in step with global warming, researchers said on Friday, contradicting some climate models predicting rainier weather patterns in politically challenged region. Cites research by Lamont's Peter DeMenocal and former post-doc Jessica Tierney.

American Graduate Day: Glaciologist Robin Bell - WNET

Featured News - Fri, 10/09/2015 - 12:00
Lamont-Doherty's Robin Bell talks with WNET for American Graduate Day about her work on glaciers, the IcePod project and what inspired her to become a scientist.

The Tsunami that Engulfed an Island - BBC

Featured News - Wed, 10/07/2015 - 10:47
About 73,000 years ago a volcano collapsed. Its force generated a wave that engulfed an island over 30 miles away. Cites research by Lamont-Doherty's Ricardo Ramalho and Gisela Winckler.

Ancient Mega Tsunami Hurled Boulders Nearly as High as the Eiffel Tower - Washington Post

Featured News - Mon, 10/05/2015 - 12:00
The evidence hinges on the nature of the boulders, which are composed of rock types that "exclusively crop out on the cliff faces and lower slopes of the plateau, implying a source at considerably lower elevations," the authors write. Richard Ramalho worked on the study at Lamont-Doherty.

Ancient Skyscraper-High Tsunami Prompts Worries about Current Risk - Scientific American

Featured News - Mon, 10/05/2015 - 12:00
"Most of these fairly young oceanic volcanoes—such as in the Azores and the Canary Islands and Hawaii—are incredibly high and steep, so the potential energy for a collapse to happen again is there,"said Richard Ramalho, who worked on the study at Lamont-Doherty Earth Observatory.

800-Foot Tsunami Once Heaved Truck-Sized Boulders Onto a High Plateau - PBS NOVA

Featured News - Mon, 10/05/2015 - 12:00
Geologists have concluded that 73,000 years ago, a tsunami six times taller than the wave that hit Japan in 2011 struck off the coast of West Africa, in the Cape Verde islands. Cites work by Gisela Winckler and Ricardo Ramalho.

Uptick in Huge Wildfires Tied to Warming - Discovery

Featured News - Mon, 10/05/2015 - 12:00
Catastrophic wildfires in the West are burning land more violently and more frequently in recent years than at any point on record. Lamont-Doherty's Park Williams explains how this year’s big fires have corresponded with higher temperatures.

California Once Had a 2,000-Year-Long Dry Spell - Discovery

Featured News - Fri, 10/02/2015 - 12:45
Lamont-Doherty scientists Linda Heusser and Jonathan Nichols used ancient pollen to look at Southern California's changing ecology through time and discovered a series of mega-droughts thousands of years ago.

NYC Subway System Prepares for Hurricane Joaquin - Wall Street Journal

Featured News - Fri, 10/02/2015 - 12:44
With Hurricane Joaquin headed northward in the Atlantic, the Wall Street Journal looked at how prepared the New York City subway system is to handle another major storm. The Journal spoke with Lamont-Doherty's Adam Sobel.

Volcano's Collapse Caused Mega-Tsunami 240 Metres High - Guardian

Featured News - Fri, 10/02/2015 - 12:00
Scientists warn that a similar event to the collapse of a volcano on the Cape Verde island of Fogo 73,000 years ago could pose major threats to nearby islands. Cites research by Ricardo Ramalho.

Stone's Throw: Evidence of a Giant Tsunami - The New Yorker

Featured News - Fri, 10/02/2015 - 12:00
Geologists tend to notice when big rocks are out of place, like the elephant-sized chunks of basalt and limestone that had formed at sea level and somehow ended up more than six hundred feet above, on a volcanic plateau on Santiago Island. Cites research by Ricardo Ramalho.

How Scary Is Hurricane Joaquin, Really? - The Daily Beast

Featured News - Fri, 10/02/2015 - 12:00
While Hurricane Joaquin swirls off the coast, two additional sources of weather woes are affecting the East Coast, bringing heavy rainfall and a rare, prolonged wind event. Quotes Lamont's Suzana Camargo.

The Storm King - Science

Featured News - Thu, 10/01/2015 - 18:28
Lamont's Adam Sobel talks to Science about the Madden-Julian Oscillation, a powerful driver of weather in the tropics.

Bringing Back the City: Superstorm Sandy and the Subways - New York Transit Museum

Featured News - Thu, 10/01/2015 - 12:00
The New York Transit Museum looks back at how New York City's mass transit responded to a flooding crisis and recovered from Superstorm Sandy. Videos feature Lamont-Doherty's Adam Sobel, head of the Initiative on Extreme Weather and Climate.

This Hurricane Won't Be Like the Last One - WNYC

Featured News - Thu, 10/01/2015 - 12:00
Hurricane Joaquin is headed north, possibly towards New York City. Lamont's Adam Sobel talks about the wide range of forecasts, the likelihood of heavy rain, and how this hurricane is different from Superstorm Sandy.

Seawater the Source of Fluid-Rich Diamonds - EARTH Magazine

Featured News - Wed, 09/30/2015 - 12:00
Subducting oceanic plates that dive hundreds of kilometers beneath Earth’s surface carry with them cargoes of sediment and seawater. As the plate heats up the deeper it sinks, this seawater not only initiates melting in the rock above it, but can also trigger diamond formation, suggests a new study in Nature by Lamont's Yaakov Weiss.

Joaquin? There’s No Perfect Forecast, So Stay Tuned, Be Prepared - WX Shift

Featured News - Wed, 09/30/2015 - 12:00
Models present a range of possible outcomes, and right now forecasters are still weighing the odds for Hurricane Joaquin, writes Lamont-Doherty's Adam Sobel.



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