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November 30, 2004

Clark Glacier

I’m still sick. I don’t have any pictures of me being sick. I don’t even have any pictures of Thanksgiving.

But I do have pictures of some of the field excursions that I’ve gone on in the past month that I’ve not yet posted.


Clark Glacier

Global warming is a hot topic, so to speak, and one way to learn about the Earth’s changes in climate is to drill a core of ice from a glacier and study the chemical changes in the ice over time. That is to say, the glacier ice offers a record of chemicals in the atmosphere, with the oldest ice at the bottom and the youngest ice at the top. Dr. Karl Kreutz’ group is drilling and analyzing ice cores from two glaciers in the Dry Valleys to better understand recent (past 2,000 years) climate patterns in that region. The group also installed a small network of mass balance stakes around the drill site to understand the ice velocity around the core. Their mass balance stakes consist of nothing more than three-meter-long metal rods drilled into the ice. My job was to measure the position of each pole so that we can measure them again next year and learn how fast they move.

Jim wasn’t able to come out, so I was accompanied by someone from town. Anne Benninger, a carpenter by trade but the South Pole cargo coordinator down here, was chosen by the powers that be to help me out. We were scheduled to be out for one night.


[Camp at Clark Glacier.]


We spent a good part of that night exploring.

Neither Anne nor I had been to that area before, so we went for a walk.


[A view into the next valley. Yes, those are *sand dunes*.]


The next day, Anne and Karl and I installed a survey marker in some nearby bedrock.


[Me hauling. Photo: Anne]


[Anne and Beth drilling. Photo: Karl]

Then, I measured the network.

[Photo pending]

Shortly before the survey was finished, we learned that helicopters for the rest of the day had been cancelled and Anne and I would be "stuck" out there another night. Neither of us minded, especially since, while the weather had gone bad in McMurdo, the weather on Clark glacier was still quite nice. Plus, it gave me time to learn about ice core drilling. This was great, as I’ve read a decent amount about ice cores and one of my housemates this summer drills (and studies) ice cores, but I didn’t know anything about the actual drilling process.


[Terry at the drill controls, with mascots Lobster and Moose looking on. Lobster and Moose were sent with Karl by his wife's 4th grade class.]


[Mike drills down.]


[Terry pulls the drill horizontal to extract the core.]


[Core extraction.]


[Mike, Terry, and Karl examine the core.]

As drilling wound down, we enjoyed the sunshine.


Bear Bear made a couple friends.

Lobster took a ride on Terry's kite.

And, eventually, we settled down to a nice dinner (Mike and Terry are both fantastic cooks) with some beverage treats I brought in on their request.

We did make it out the next day, in the morning, and left the four Clark glacier dudes behind. I wasn't *too* sad, though, since I knew I'd get to meet up with them out in the field again, next time at Commonwealth glacier. Stories to follow.

Posted by beth at November 30, 2004 5:12 AM

Comments

i'm always amazed at the variety of beautiful scenes that are found in antarctica. nature is amazing. thank you for loving photography and for loving to put what you see in words.

Posted by: wilma - mother of beth at December 4, 2004 7:42 AM

Your storys and pictures of Antartica always amaze me. What a beauriful and surprisingly varied land. Must be amazing to be there in person. The earth is such unique varied world, its to bad civilization is slowly destroying it.

After seeing your great pics Ive started posting some of my travels on a blog. I look forward to more of your adventures and get well down there.

Posted by: Reed at December 4, 2004 4:49 PM

WOW, again! Great pictures and information. It's that age old story, the more you learn, the more there is to learn. This place is fantastic. thank you for sharing it with us. I have been searching the web for some of the places and things you are telling us about, and learning more all the time. Last thing I found was an arial view of Dry Valley. Hope you are feeling much better. Aunt Pat

Posted by: Pat at December 5, 2004 12:40 AM