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| Lettau is fairly far south, while Carolyn is just north of 80S. CTAM is a bit southwest of Elaine. |
We had a super long but productive and great day Saturday. The weather
finally looked up over the ice shelf (see description below, next to the
satellite image), so we were able to fly to our southernmost site for
the season - Lettau - and another on the way back that was closer -
Carolyn (both marked on the map above). We got to the airfield and took
off at 9:10am and didn't get touch back at Pegasus until 8:30pm, and we
still had to get to town to have dinner that had been held for us.
However, by the end of the day we could cross both Lettau and Carolyn
off our list, and we also surprise visited one of the most beautiful
places I've been on the continent and probably the world.
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| Description of the weather - I think the forecasters get bored with cloudy bad weather many days in a row. This is also the page that gives the weather in McMurdo and South Pole, as well as the conditions around McMurdo. |
The day started with really nice
Fata Morgana from a surface inversion. I'd seen this before (see Arrival Heights blog post), but it was very clear the whole drive from McMurdo to Pegasus. It's clear why people say mirages make it look like there are huge cities or cities in the sky; the LDB camp where we've flown our RC airplanes looked enormous.
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| Fata Morgana distorting the air right near ground level. It's a pretty clear band across the entire horizon. I'm not sure what the black thing is in the distance. |
We flew to Lettau first; it has been off the air and we needed to see if we could figure out what was wrong. The flight is about 400 miles from McMurdo, so the flight was a bit over 2 hours to get there. When we did it was cold and windy, but we got out and started testing the station. The instruments and antenna were fine, and the station was getting power, though the battery voltage was lower than we'd like. So, this suggests there is something wrong with the electronics in the enclosure. We can't fix that in the field so we took the box off and will ship it to Wisconsin for repairs. And we were off en-route to Carolyn.
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| Lettau sans AWS enclosure but with instruments still attached. |
Because Lettau is so far south from Ross Island we had to get fuel before we could get to Carolyn and then home. We were scheduled to go to a fuel cache on the ice shelf, but when we got to the coordinates there was ground fog, which is very difficult to forecast. It wasn't super thick, and you could see the ground peaking through every so often, but that's not good enough for landing a twin otter safely. So we had to find a different fuel cache, if for no other reason than we needed to get home. The nearest cache was CTAM, Central TransAntarctic Mountains.
My friend and fellow group member was able to go to CTAM last year, and it looked amazing. But I knew almost all our sites this year were on the ice shelf, so I hadn't even let myself think I might get to the mountains. Nearly everyone who's reading this must know that I love mountains. When I'm near mountains I feel so much happier, lighter, relaxed, and just calm. In places with trees or complete flat I never get the same elation as when I'm in open mountains with visible peaks and open skies. I don't know how to explain it, it just is how it is. So when we started toward the mountains and could see them in the distance I was super excited. I ended up sitting awkwardly on a tower section near the front of the plane just so I could see the mountains more clearly, and I was not disappointed. We flew up the Lennox-King Glacier, just to the north of the enormous Beardmore Glacier that Scott used to ascend to the Plateau on his South Pole attempt.
I don't think I can entirely describe how wonderful the trip was, but I just loved the whole flight, and it was even better since it was a surprise. We could see the rugged peaks, neat crevasses and icefalls, and even sedimentary layers in the mountains. The fuel cache was located in this huge valley that was just relatively flat ice surrounded by mountains. We stopped and walked around a bit while the pilots refueled; as we walked around the snow crunched and shifted in a semi unsettling way (falling in a crevasse was not - is not - on my list of things to do). It was not windy and about 5F up there at 6000ft. This year there wasn't a large camp, only a few groups stayed briefly, so there was almost nothing up there. We were the only people in this huge valley filled with ice and beautiful mountains. It was just magical and I don't really know how to explain it, so I'll just add some of the pictures I took though they still aren't able to capture the elation I felt up at CTAM.
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| Me at CTAM with some of the mountains in the background. |
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| The Beardmore Glacier |
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| Peak in the central Transantarctic Mountains. You can see a neat band of sedimentary rock near the summit. |
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| Crevasse field in the Lennox-King Glacier near the base of the mountains. |
We filled the plane to the brim, and then we loaded up the fuselage with the 8 fuel barrels we used. That meant that the flight smelled a bit like fuel, which we soon got used to. It also created a good area for a footrest, though later when the barrels shifted and the cargo strap came loose I was more nervous about being crushed under a pile of fuel barrels. Fortunately this didn't happen.
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| Me with fuel barrels and footrest on AWS enclosure. |
We flew for another 1.5-2 hours and then arrived at the site for
Carolyn. We had one bad attempt because the pilots had the wrong
coordinates, but we finally got there and landed. At this point it was getting really late and we had about an hour on the ground. Carolyn also wasn't transmitting, and when we arrived it became clear we needed to raise it as well or it wouldn't be found next year. This is a big job because usually it takes 2-4 hours to raise a functioning tower, and this one wasn't functioning either. Well, we decided if nothing else we'd just raise the main boom and then people could at least find it next year. It was beautiful weather and calm, so John and I, the two
pilots, and two town folk we'd brought along started working on the
tower. And we were off!
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| Carolyn before. Notice that the enclosure is buried and the whole station is less than 4ft. tall. It is also blue and beautiful out. |
While John did the testing and working with the AWS enclosure, the
pilots and I ended up taking off the instruments and getting the new
tower section on and then reinstalling the instruments. John figured out
there was something wrong with the electronics in this AWS as well, but
we brought a functioning extra AWS we had taken from a station removed
this year. We installed it and with the newly placed instruments
attached it to the tower, and then it transmitted! All this happened in less than an
hour ground time since the 6 of us worked well together. And we finished
just in time as a very cold ground fog rolled in and decreased visibility. We were so thankful to the pilots for making it a long day
to finish up our last stations for the season that required twin otter
time. They were so friendly and helpful, and it was great to get
everything done and see a beautiful part of the continent. We got back
to Pegasus near 8:30pm and then had dinner in McMurdo around 9:30pm in a
very quiet and calm galley. Then it was time for a shower and sleep
since Sunday is the first time in weeks I could sleep in.
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| Carolyn after. Now it is much taller and actually works, though we took some less important instruments off. Also notice the fog that has come in while we worked. |
P.S. Our friends and colleagues stuck out at Lorne made it back late Friday night from their 2 day, unplanned camping trip.