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Andy & Joe & the mighty (but tiny) PistenBully, a German vehicle specialized for ski resorts. We drove it 20 km out from the station, on a radial which is monitored every year to keep track of snow accumulation. |
12/15/02
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Andy & Joe & the mighty (but tiny) PistenBully, a German vehicle specialized for ski resorts. We drove it 20 km out from the station, on a radial which is monitored every year to keep track of snow accumulation. |
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 McConnel 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 station
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.
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The lonely life of an ice scientist... Joe McConnell takes ice samples along the 20 km radial. He is a specialist in measuring various synthetic pollutants that accumulate in ice, and works at the Pole and the Greenland ice sheet. |
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Joe McConnell, with plastic gloves and super-clean sample bags, collects more ice samples. From each site, he fills 3 bags with as much ice as possible (remember, it doesn't snow here, it ices) Snow accumulates in little hills called sastrugi, which have a lot in common with sand ripples in the desert. Joe is careful to sample from both sides of a sastrugi, as the ice on one side may be of different size, age, and origin than the other. |
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 are 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.
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Here's how things get moved around at the pole. A lot of the housing and buildings are are skis and are dragged from place to place as needed. |
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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Later in the day, in the Skylab music room, playing Henry Kaiser's special Pole guitar, made of carbon fiber & resin. Henry, it sounds good, and it seems like it's getting a lot of use. I saw it over at a party at the Clean Air Lab the other night. |