15 December, 2002
15 December, 2002
About the ice expedition yesterday : we drove 20 km out from the station in a German ski resort specialty vehicle called a PistenBully. It's a little bug, with 2 seats in front, a square cabin in back, and caterpillar tracks, and it's just the thing for a bumpy ride across the trackless deserts of the Antarctic plateau.
Sitting in the back was almost identical to one of those really bad Disneyland rides where they pack you into some kind of a box with seats, show you some silly rescue mission movie about being shrunk to the size of blood cells, then you get injected into the aorta of some actor who¸s supposed to important, like the King of Slobovia. Then they fire up the microchip-controlled hydraulics under the box, and it¸s sort of timed to the movie, so when you make a wrong turn and go through the heart, the hydraulics really shake the box around, and you feel really sickened by the ride, how long you waited in line for this, and how much money you forked over to the Disney empire for this.
It was like that, except we were really on a mission, and didn't pay for admission, and didn't eat bad, overpriced food, and didn't wait in line, and Antarctica was right outside the window.
20 km out, on radial F from the pole. There was already a track from last week, when a similar mission came out to measure the snow level on a regularly-spaced series of stakes. It's not clear how much snow levels change, year to year, decade to decade, or even longer intervals. This is an important question for all kinds of reasons. Is the accumulation of snow around the pole station an anomaly, or caused by the buildings of the station, or a sort of moving ripple, like a big sand dune ? Or it might be due to bedrock features 2 miles below, which cause surface bumps and ripples as the ice passes slowly over on its 10 meter per year to the sea.
From a topographic map that Joe McConnell had, it was clear that this area isn't exactly flat. In fact, there¸s changes in elevation on the order of several meters over our 20 km trip. At one point, fairly close to the station, we went into a slow dip, where the entire station dropped out of site.
Pretty remote. Andy, our driver, NOAA Clean Air Lab manager (and later that evening, guitarist) left the engine running. It's a long walk back to the stations.
I was struck by how much like a desert this was. 4 wheel-drive road wiggling off over the horizon, drifting dust (ice), little dunes (sastrugi), too dry for life to get much of a hold. It reminded of some places in Baja California or the high desert in Nevada.
Ice scientist Joe McConnell's mission was fairly simple : stop every 2 kilometers and collect samples of the surface ice. The hard part comes back in the lab. Joe planned to analyze each sample for synthetic chemicals (hydrocarbons), and establish a sort of pollution gradient stretching out from the Pole Station. This radial put us upwind of the station, and Joe planned a similar mission the next day downwind of the station.
I've done some of this work, and it's very demanding in the lab. You¸re looking for trace amounts of these chemicals, so all of the work has to be very very clean.
Joe does other similar kinds of ice work here at the Pole and in Greenland. Here, he's been digging a pit, and looking at how certain types of synthetic refrigerants may have penetrated into the surface layers of the ice. There's some evidence that the top 10 meters or so of ice acts as a sort of sponge, and there's quite a bit of air (and pollutant) movement through this entire layer.
Joe's pit is out in the Clean Air Sector, a wedge extending upwind from the station, anchored at the tip of wedge by the Clean Air Lab. No machines and hardly any activity of any kind is permitted in Clean Air. I even heard that a Norwegian expedition planning on recovering Amundsen's tent (he was first to the pole in 1911) was denied permission, because they were going to dig in Clean Air. Don't ask me how they could have any idea where to dig. Ground-penetrating Radar ?
Joe is headed to Greenland in April, and he was considering taking a TEA teacher, and that's how we got to talking in the galley, and got this little expedition set up.
I told him that most teachers were pretty tough, and to bring one along.
What actually happened today ? Morning, we all went out and tried to organize all the leftover AMANDA drilling stuff left outside when drilling finished. It's all in disorganized boxes. You can imagine : housecleaning in -30 degrees. Yow !
That caused me to take a nap. More digging out AMANDA cables out at MAPO, some guitar playing, some ping pong with Bai after dinner. Our game was pretty close. He was toying with me, though. He's got all the moves of one of those super Chinese smackers, and I can't believe he hit the net as often as he did.
I will box him later, and show him who's boss.
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