Ice Stories: Dispatches From Polar Scientists » East Antarctic Ice Sheet http://icestories.exploratorium.edu/dispatches Mon, 15 Nov 2010 20:40:36 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 Moving On http://icestories.exploratorium.edu/dispatches/moving-on/ http://icestories.exploratorium.edu/dispatches/moving-on/#comments Fri, 22 Jan 2010 20:41:41 +0000 Rob Dunbar http://icestories.exploratorium.edu/dispatches/?p=2174 JOIDES RESOLUTION, OFF THE COAST OF WILKES LAND, ANTARCTICA– So, guess what? We had to abandon our first drill hole, the one I wrote about yesterday. Turned out we had drilled into a massive body of sand, gravel, and big rocks...]]> Temperature +1C, wind 15 kts, 2 meter swells, 63 degrees 18 minutes South and 136 degrees 0 minutes E.

ABOARD THE JOIDES RESOLUTION, OFF THE COAST OF WILKES LAND, ANTARCTICA– So, guess what? We had to abandon our first drill hole, the one I wrote about yesterday. Turned out we had drilled into a massive body of sand, gravel, and big rocks. This came from the bulldozer effect of the ice on Antarctica. The force of the Ice Sheet as it grew to the edge of the Antarctic continental shelf scraped off all this rock and debris and bulldozed it into the deep sea – and think of a bulldozer with unlimited horsepower and a blade 2000 km wide. The power of ice to erode the hardest rock and move it great distances is unmatched by any other natural process on Earth. We just HAPPENED to be trying to drill where a deep sea canyon or channel was taking the heaviest stuff. This was unexpected from all of our pre-drill site survey work, and to be honest, very unlucky on our part – there aren’t that many channels of this type out here in the deep sea.

Our drill could only go 40 meters into the seafloor before it started to get stuck. But we described the core all night and learned some new things – like what kind of rock is under the ice. Since almost no rock sticks up above the ice, this is how we tell what is underneath. So every hole, even a short one like this one, has a story to tell.

We’ve since moved 84 nautical miles to place where we are sure there is no channel. The water is deeper but we are much more likely to achieve our main objective of seeing back into a time when Antarctica was ice free. So, we are all still excited and we are also trained as it was the first time the entire team of 30 scientists worked together with the staff and technicians on the ship to recover and describe the core.

Here are a few photos. The Albatrosses around the ship are amazing. They follow us everywhere.


Black-browed Albatross from the deck of the JR Expedition 318.

Expedition 318 scientists waiting for the first core.

Sakai-san, my roomate aboard the Joides Resolution Exp 318. He is an expert in Radiolarians, a really cool microsfossil.
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First UAV Flight in East Antarctica http://icestories.exploratorium.edu/dispatches/first-uav-flight-in-east-antarctica/ http://icestories.exploratorium.edu/dispatches/first-uav-flight-in-east-antarctica/#comments Fri, 25 Sep 2009 17:59:06 +0000 Zoe Courville http://icestories.exploratorium.edu/dispatches/?p=1819 Norut (Northern Research Institute) in Norway, was in charge of flying the UAV (Unmanned Aerial Vehicle) we had along with us on the traverse. The UAV carried a payload of...]]> HANOVER, NEW HAMPSHIRE– Andreas Tollefsen of Norut (Northern Research Institute) in Norway, was in charge of flying the UAV (Unmanned Aerial Vehicle) we had along with us on the traverse. The UAV carried a payload of several instruments, a radar and camera, that we used to help image a large area surrounding our traverse route. Flying the UAV is tricky up on the plateau, the high altitude, strong winds, and cold temperatures make almost everything difficult. But Andreas did have the first UAV flight in East Antarctica, not a small feat, and we all got the thrill of watching it.



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The Train from Pole to Troll http://icestories.exploratorium.edu/dispatches/the-train-from-pole-to-troll/ http://icestories.exploratorium.edu/dispatches/the-train-from-pole-to-troll/#comments Wed, 25 Feb 2009 20:16:39 +0000 Mary Miller http://icestories.exploratorium.edu/dispatches/?p=1575 SOUTH POLE, ANTARCTICA– At the South Pole, we met up with Ice Stories correspondent Zoe Courville just before she and her team embarked on their 3,000 km traverse across the desolate and frigid East Antarctic Ice Sheet. In this video, Zoe gives us a tour of the vehicles they are taking on their cross-continent journey, including their living module, sleeping quarters, and science sled. (Video by Lisa Strong-Aufhauser.)



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Mapping East Antarctica’s Uncharted Territory http://icestories.exploratorium.edu/dispatches/mapping-east-antarcticas-uncharted-territory/ http://icestories.exploratorium.edu/dispatches/mapping-east-antarcticas-uncharted-territory/#comments Fri, 06 Feb 2009 18:55:10 +0000 Mary Miller http://icestories.exploratorium.edu/dispatches/?p=1545 WILLIAMS FIELD, NEAR MCMURDO STATION, ANTARCTICA– East Antarctica contains nearly all the world’s supply of fresh water and could contribute hundreds of feet of sea level rise, yet little is known about the stability of this vast ice sheet. In our interview with Jack Holt of the University of Texas at Austin, we learn about a project to chart a glacier in East Antarctica that scientists believe is losing mass. (Video by Lisa Strong-Aufhauser.)



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South Pole Ack Camp http://icestories.exploratorium.edu/dispatches/south-pole-ack-camp/ http://icestories.exploratorium.edu/dispatches/south-pole-ack-camp/#comments Sun, 21 Dec 2008 20:03:59 +0000 Robin Bell http://icestories.exploratorium.edu/dispatches/?p=1384 SOUTH POLE STATION, ANTARCTICA– After more than a month in McMurdo, members of the AGAP team are camping at the South Pole to get our bodies acclimatized to high altitude living. Our destination is AGAP south camp in the East Antarctic Ice Sheet. In this video, I describe the “ack camp” and what’s next for our team.



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Homeward Bound http://icestories.exploratorium.edu/dispatches/homeward-bound/ http://icestories.exploratorium.edu/dispatches/homeward-bound/#comments Tue, 09 Dec 2008 21:23:33 +0000 Howie Koss http://icestories.exploratorium.edu/dispatches/?p=1293 OFFSHORE NEW HARBOR CAMP, ANTARCTICA– November 24th, 2008: my final day at the Offshore New Harbor Camp. After completing nearly 48 kilometers of seismic data collection and setting a new standard for how this type of study should be performed on sea ice, the scientific objectives of our expedition were met and exceeded. It was time to celebrate with a helicopter ride into the Dry Valleys.


Dr. Pekar as the helicopter landed at the Offshore New Harbor field camp.

The excitement built when a distant dull hum steadily became a louder roar as the helicopter approached and finally landed at our camp. Eight of us strapped ourselves in for a most memorable ride.


Flying in the helo.

I had only been in a helicopter once before and I couldn’t wait to see the view unfold before my eyes. We were going to be flying over New Harbor, a sight we had seen from afar every day since we had arrived at our field camp. But this time, it would be different. Once over New Harbor, we would fly through the Ferrar Valley, over the Ferrar Glacier and eventually to the Friis Hills field camp to visit with Dr. Allan Ashworth and Dr. Adam Lewis who were looking at 20 million-year-old glacial lake sediments for fossilized plant leaves to better understand Antarctica’s role during that relatively warmer time period of Earth history.


Looking up Ferrar Valley, flying over New Harbor.

Shortly after take-off we were already getting a much closer view of New Harbor and the Ferrar Glacier as we quickly approached Ferrar Valley. As we sped past glaciers seemingly falling off the sides of mountain tops, the vastness of the Transantarctic Mountains opened up. We were in the Dry Valleys.


The banded mountains of the Dry Valleys.

The mountains were huge and banded with different colors, each color a different rock type. As we soared higher and flew deeper into the mountains, the enormity of Antarctica showed itself.


The East Antarctic Ice Sheet.

The largest continental mass of ice on Earth, the East Antarctic Ice Sheet, could now be seen. We were only seeing a very small portion of it, but it extended as far as the eye could see beyond the mountain tops. This is the source of the ice producing the glaciers that we could see all around us.


Friis Hills field camp as the helicopter touched down.

The helicopter landed at the Friis Hills field camp, and the first thing I noticed was how the Dry Valleys got its name. It was dusty and gritty, very different than what I was used to out on the sea ice. The rotor blades of the helicopter blew sand and gravel into the air. Sand and stone were everywhere. But it hasn’t always been that way. We were meeting Dr. Ashworth and Dr. Lewis. They had agreed to take us on a tour of their research site and explain to us what they were studying.


Walking through a former glacial lake.

Dr. Ashworth and Dr. Lewis explained to us that in the past glaciers cut through the surrounding hill tops, and that 20 million years ago it was a relatively warmer time in Earth’s history. And because it was warmer, some of the ice from the glaciers melted to form lakes. By studying how these glacial lakes formed and what kinds of vegetation were in these hills of the Dry Valleys, Dr. Ashworth and Dr. Lewis hope to better understand how Antarctica responded to this warmth.

The most exciting part of their tour was to see the 20 million-year-old leaf fossil impressions that they had dug up at their research site. The leaves themselves are gone, but what is left is the impression that these leaves made in the lake-bottom mud. The leaves of bushes bordering this lake were blown into the water when they fell off the branches. They then sank into the mud on the bottom of the lake. Shortly afterward more mud accumulated on top of the leaves. The leaf material then disintegrated but a mark was fossilized in the rock where the leaves once laid.


20 million-year-old leaf fossil impressions.

We made our way back to our camp. This was the last time that the entire team would be together out on the sea ice. Andrea, Shakira, Joanna, and I were flying back to McMurdo Station on the helicopter that had taken us around during the day. We had a few minutes to gather our belongings, load up the helicopter, and have a group photo taken, by the helo pilot no less (thanks Paul!).


The Offshore New Harbor Team.

I had mixed emotions as the helicopter took off. I could see how tiny our existence on the ice was as camp soon became a little speck on the horizon behind us. The only way to notice it as we got further and further away was by following all of our tracks on the ice surface that we had traveled to get out to the transect lines where we were collecting data. All paths lead back to camp. We were 17 people in the vastness of Antarctica. 17 people working together to accomplish a common goal. We were successful against early setbacks and I was proud of what we had done as a team. The data that we collected will be used to identify a drilling location to obtain sediments to study our past climate in order to better understand our future changing world. And I was a part of it all. I felt extremely lucky to have been selected to join the Offshore New Harbor Expedition and very honored to have shared that place with every other member of the team.


Offshore New Harbor Field Camp from the air.

This new path with no track in the snow was not going to take me back to camp. I was beginning the long journey home. Back to McMurdo Station, fly to New Zealand, and then make my way back to New York. I am going to miss the Offshore New Harbor Team and the many good friends I’ve made at McMurdo. But thoughts of family and friends I haven’t seen in many months flooded my mind. I have missed them immensely. I am ready to leave. I am ready to return home. My work here is done, for now.


McMurdo Station from the air.
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