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Scott Base: Kiwis and Seals

December 6, 2014

Downhill from McMurdo, at the foot of the congealed lava blob on the Ross Sea, stands the New Zealand research center, Scott Base. Named for the famous South Pole seeker Captain Robert Scott, Scott Base was founded in 1957 as part of the International Geophysical Year project. New Zealand plays a key role in all Antarctic missions, for flight connections and resupply.

1_Scott_Sign

New Zealanders (often called Kiwis after their Maori-named indigenous bird) have a longstanding interest in Antarctic exploration. Their base conducted scientific research before research became the focus of McMurdo. Their buildings are all colored a pretty “Chelsea cucumber green.” Proud of New Zealand’s native heritage, they have a Maori statue (left) presented by a Maori delegation who came to visit.

Today, Scott Base and McMurdo are heavily interdependent, but maintain distinctive identities. The general opinion of Scott Base is “smaller and better.” While accommodating just 85 people in the summer, they do impressive research on geophysics and seal behavior. Their site has the better view, including two smoking volcanoes Mount Erebus and Mount Terror. You can see the smoke rising from each.

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Closeup of Mount Erebus:

3_Erebus_Close

Scott Base manages the coolest tour site, the pressure ridges. Pressure ridges are the place where the sea ice meets the more permanent land-based ice, crushing it up in chunks; you can see those in the middle (above; more below). The pressure ridges make holes, which attract seals (yes, we’ll get to those below).

10A_Pressure

The Kiwis, as they call themselves, have superior extreme-weather gear, orange-black parkas that are less bulky than Big Red but just as warm. Kiwis get about on orange-black skidoos, the coolest personal vehicles we’ve seen. They have their own helipad and contribute an orange-white helo to the Dry Valley fleet.

4_Skidoo

I was honored to accept an invitation for a tour from Jill, an NZ air force officer at the base. Here we are in their flight control room, run by Ben (who is navy, but Jill doesn’t mind.) Scott Base runs their own helos as well as flights from Christchurch; these are coordinated closely with McMurdo, where I met an NZ crew visiting the day before.

5_Jill_Ben

Jill showed me the historic site of the original Scott Base building on Pram Point (named for a boat called a pram). The interior has been kept frozen in time, the way it looked back then. Here you see the original living room, with a bathtub and a board game.

6_Pram_Point

Today, New Zealand hosts weather researchers like Jack. Jack had just come off a helo setting up twenty weather stations on the Ross ice shelf. New Zealand is installing their own array of weather stations, to see if their data confirms the American set, and to test additional questions.

7_Jack_Weather

As we saw in McMurdo, every scientific project requires extensive maintenance. Scott Base has its own awesome maintenance shop, where I wish I’d had more time to explore

8_Maintenance

In the gear supply, Amanda is sewing a sleeping bag. Scott Base’s gear supply center resembles that of McMurdo’s BFC—but some of the gear is quite different. Kiwis prefer the famous Scott tents. A Scott tent looks more like a teepee, includes a chimney exhaust for cooking, and houses more than one person. This makes more sense to me than the American style of one person per tent.

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In the living quarters of Scott Base, I was introduced to Anthony Powell, director of the award-winning documentary film A Year on Ice.

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Powell maintains an office at Scott Base. You can see he is proud of having overwintered. Unfortunately I was too star-struck to ask questions.

The Kiwis maintain the tour site for the pressure ridges. This time of year, it’s still safe to walk out on the ice, though later it melts too far in; last year, orca whales were seen here.

11A_Ice_Beginning

For now, the ice is safe enough for visitors to walk with care. The Kiwis go out every day with an “alpenstock” stick to probe the ice for cracks. Then they set up flags for the tour. Green or red flags are okay, but black flags mean don’t go here because there are holes or deep cracks.

Here you can see the sea ice rear up, exposing its blue underside. We walk past, close enough to touch; it’s unnerving. Our guide Lauren walks ahead, probing with her alpenstock.  Uphill the windmills turn, providing most of Scott’s power.

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No, this is not a hole straight through the ice! Here, pools of water have melted atop the ice, forming moats around the jagged mountains.

13_Ice_3

But there must be holes somewhere–since there are seals. The holes in the ice attract seals, because the animals can dive for food here without predators such as whales. And seals attract visitors with expensive cameras.

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The seals basically loll around for days, smelling up the neighborhood. They rest after diving hundreds of meters for food, and after fighting with each other; the snow shows red blood stains. According to law, we are not allowed to “disturb” the wildlife. But their availability for dozens of humming cameras enhances public support for protecting Antarctica.

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Here, a baby seal (right) extends a flipper while resting next to the mother. That’s how I feel in my tent after a long day.

Thanks to the Kiwis for maintaining the pressure ridge tour, and for sharing their distinctive mission at Scott Base.

Next: Back to the field, where lakes are upside down.
Index: Antarctica

Mactown: Special People

December 2, 2014

This page is a salute to all the special people who keep things running at Mactown (McMurdo Station, Antarctica). Run by the National Science Foundation, McMurdo is the USA’s major Antarctic research center. It’s also a unique town community, built upon a blob of lava that dribbled out from Mount Erebus and solidified thousands of years ago. For my full run of posts so far, see Antarctica linkAny corrections, please report here. 1_Loomie_Sandra Loomie and Sandra have my vote for the cutest couple in Mactown. As in a college town, the work of the scientist-educators requires tremendous support from people with all kinds of skills. Loomie does special construction projects, such as building a new footbridge at Blood Falls–one of the Dry Valleys’ most famous landmarks. Studying such sites is a challenge because it requires a safe observation point for scientists, with minimal disruption of the site. Sandra  follows helo flights at the Flight Center. 2_Sandra_Flight_Ctr You can see at left the screen where two helicopters are off across the ice. The middle screen shows a plane arriving from New Zealand. At right are all the radio channels. This is an amazing amount for one person to keep track of, and keep all our travels safe. The buildings require all kinds of special maintenance. 3_Michael_Neville Michael does maintenance for Crary science lab. Here he meets with Neville, the boiler inspector. An important part of Michael’s job is feeding Neville lobster so that he’ll let the boilers pass inspection. If Neville fails the boilers, the whole station will go dark. Crary lab (which I’ll blog more about next week) requires all kinds of special maintenance. For instance, you need different kinds of water–the sink water, here, as well as de-ionized water. Keeping all the special plumbing straight is important here, just like at Kenyon where Dave Boughter does it. This photo shows the “cubitainers” for lake water collection, which I’m bringing out to the Dry Valleys today (weather permitting). The cubitainers are cubical plastic containers that cleverly pack half-inside-out, for transport. However, even the fresh plastic contains impurities that we have to wash out with acid and deionized water, before collecting lake samples. 4_Cubitainers Once samples are collected, we filter them and they need to ship back by helicopter–a lot of heavy loads for those poor helos. Then the samples need to ship off continent. This is a challenge because different samples need different conditions to stay fresh. 5_Kara_Craig Kara is an expert sample shipper. She was hired for her degree in Environmental Science, so she understands why some live samples need to be shipped on ice, whereas others need to be frozen on dry ice or liquid nitrogen. Kara’s husband is Craig, the helitech who brought me home from the field late at night last week. There are a lot of hard-working couples here. Besides cubitainers, I was instructed to bring some other essential items of field science equipment: 6_BFC Thanks, Greg, Claire, Brent, and Isaac! Here are Manuel and Karsten, in the craft room. On their own time, they are making T-shirts for the Thanksgiving night party (see below). 7_Manuel_Karsten Karsten is a steward, who keep the food in stock and cleans up the galley and mess deck. Like at Kenyon College, that’s quite a big job. Manuel runs shuttles, and drives Ivan the Terra Bus. Famous as the world’s slowest bus, Ivan drives visitors in from the planes arriving at Pegasus field (on the ice). 8_Ivan_Terrabus Here is a video I took from Ivan, the day I arrived. You can tell from the video that the bus has no shocks. The interior is wood paneled, way cool! At such an isolated post, a major challenge is to keep up morale. On a daily level, McMurdo is not exactly the most lovely place. It’s very functional, and the functional pipes are there, going every which way in the mud. Can you see the mountains? Yes, if you look closely, but it’s easy to forget. 9_Mac_road Fortunately, people are so friendly–this is the friendliest place I’ve been. And there are great opportunities for a makeover! 10_Alicia_Hair Even scientists need a haircut after the first month or so. Alicia offers the best haircut on the continent–for only ten dollars. And you can’t beat the décor. Got milk? 11_Elise_Joan Nothing beats the blues like good food. Elise instructed me how to use the cafeteria–especially never to eat on the blue tile. The galley has very involved procedures to avoid disease transmission, especially the awesome hand-washing machines. I’d like to see Kenyon implement those back home. 12_Blue_tile Everyone is friendly and glad to talk about their work. But they also work hard, and they always mind the clock. Check out this gigantic Antarctic clock; look closely at the “numbers.” 13_Clock Thanksgiving is a special holiday. There are three seatings for a very special dinner. Here you can see people lining up for the 5:00pm seating. 14_Line_Tday I was thrilled to get all the traditional turkey and pies, as well as more exotic items. 15_Tday_mealBut when I sat down alone without Michael and Daniel, I teared up. Everyone has family so far away. Fortunately a couple of old-timers invited me to share their table. They described what it’s like to “overwinter” here. Most of the buildings go dark, but the galley can be self-sufficient and survive on its own for a long time. Surprisingly, most of the renovations go on during the winter. 16_Tauntaun_poster After dinner came the party. The theme was “Year of the Tauntaun,” a monstrous creature from an ice world in the Star Wars universe. 17_Tauntaun_Party The party was full of cheerful gals and shy guys. One gentleman expressed amazement at seeing so many ladies in skirts instead of Carhartts. 18_Skua Of course, it wouldn’t be Mactown without skuas. The skua is a fierce marine bird that hunts for any item that might be edible; it will dive at food you carry from the galley. Here this skua has found a stick and is trying to eat it. Come to think of it, scientists are like the skua: We dive for data wherever we can, desperate to find meaningful patterns we can publish. And we’re always grateful for Mactown.

Next post: Kiwis of Scott Base — And Seals!
Index: Antarctica

Thanksgiving in a Tent

November 29, 2014

Tent_1The week of Thanksgiving I slept like the Pilgrims, in a tent below freezing outside without plumbing or fossil fuels. However, there was 24/7 solar as well as my own body heat. Here is what it looked like, Monday morning. This particular tent I inherited from a taller student who couldn’t sit up straight in it. Each tent is positioned in a “historic” spot where tents have been before. This is part of the NSF extreme attention to minimizing human disturbance of the protected Dry Valley ASMA (Antarctic Specially Managed Area). Other areas are more restricted; for example even overflights are prohibited over the Barwick Valley region.

Tent_2

After unzipping the main door, here is the front porch of dry valley sand. The rock holds my sleeping bag to keep it from sliding downhill into the back of the tent. My right foot has an extra sock because my toe is sore and won’t fit into a boot today.

Tent_3

And here is the view. A cloud layer crosses the glaciers today—that’s new, for this desert.

As I climbed down to the camp, my sock foot worked surprisingly well in the dry sand. Why don’t they make boots more flexible, like a sock? But the camp was horrified to see me without a boot, so they called NSF for a Medivac (medical evacuation). That is, a first-class seat on the next helicopter back to McMurdo. Conveniently, this would be the today’s helo, which Amy’s group needs to get their live samples back to the lab for assay. Amy’s group is assaying whether the lake microbes are more growth-limited by nitrogen or by phosphorus. “Growth limited” means that which nutrient falls short first, ending microbial growth. If you provide  the nutrient, you get an algal bloom—like lakes in Ohio.

But the weather has changed. It’s snowing.

Snowing

It’s actually snowing in the Antarctic desert. If you look closely, you can see the big frosty flakes. Across the lake, the mountain is beautifully etched in snow like powdered sugar.

 Snow_frosted_mountain

This snow may not look like much, but meanwhile around McMurdo we hear there are tons of snow, and even Condition 1 weather (the kind where everybody is ordered to stay indoors). So there will be no helos today. Amy’s team will have to resample fresh microbes from a hole tomorrow.

The good thing is, my toe cleared up fine with Ibuprofen. But NSF refused to rescind the Medivac order. NSF works on an abundance of caution; safety is always the first priority. Thus, old-timers say they never report injuries unless they’re half dead. So  I still have a first-class seat on the helo, whenever that will be.

 The camp needs comfort food. It’s my turn for dinner, so I used what ingredients we had to bake something like my mother’s lasagna. There was plenty of mozzarella, but the ricotta was actually mayonnaise.
Lasagna

Meanwhile, Rachael has compiled results of our time-course experiment. Much of the data collected here is long term, and won’t be analyzed till later. But Rachael has used the fluorimeter in camp to measure the densities of green algae and yellow algae at 15 meters depth, over the past several weeks.
Rachael_data

The data show that the yellow algae are outcompeting the green algae at this depth, the depth where the most organisms live. This is interesting because yellow algae are mixotrophs; they can gain energy from eating organic foods, in addition to photosynthesis. It’s as if they are combination animal-plants. The green algae, with the strongest photosynthesis, dominate in the surface water, where the light is most intense; but at the lower depth, the yellow algae do better, perhaps feeding on the falling bodies of the green algae.

Every day now the “helo ops” tells us when the next flight is scheduled; there is always a schedule, even though we know the valley is full of clouds and the flights are down. But the helos always say they are looking for a “weather window.” So Amy’s limnology team has to obtain new samples every day. Someone gives me a dark look, muttering that all the unusual bad weather happened just when I arrived. This is typical camp humor; the newest arrival is always suspect.

Actually, I did bring the bad weather. I looked down the valley and asked the storm goddess to keep the clouds around a while longer. Whereas Amy has been here eleven seasons, I just got here, and if I leave now, I might never get back to the field again. Every day without helos is a win for me.

One day we had to drill a new hole for Amy’s samples. This is because if you take samples from one hole, the water layers are disturbed and you have to wait a while before sampling. The mention of the drill wakes up even the most depressed of the boys. Drilling a hole in the ice is a Freudian activity (I’ll post the video when bandwidth allows). All the boys want a chance to do it.

Drill_1

The ice is so thick that you have to chain one drill bit onto another, drilling each one through in turn.

As the drill breaks through the bottom of the ice, water gushes out (Freudian, like I said) and you have to pull out the whole thing.

Drill_3

Wednesday the helo ops say that they’ll definitely fly on Thanksgiving. Down the valley, the storm goddess has had enough. Knowing this is my last day, I skip sampling and spend the afternoon on the mountain, rock-tripping.

The wind-carved rocks are so mind-blowing that you need no drugs for a psychedelic experience. Every rock is a trip to another world. This one is a stack of pancakes:

Rock_1

And this one, a sleepy brown bear:

Rock_2

The colors of all the different minerals give you kaleidoscope eyes:

Rock_Collage1

On Thanksgiving morning (a day ahead of the USA), I hike down to the kitchen in bunny boots, expecting to leave. But the helo ops has called off all flights for the day. The camp is in uproar; everyone is fed up. Most of them leave to hike four hours to Camp Hoare for Thanksgiving dinner. I watch them leave, knowing they’re wrong.

Those of us who stay behind catch up on internet, revising manuscripts. Our diesel fuel is nearly gone, but the solar electric is strong. The students decide to use the day’s useless lake samples to shower or wash hair (they haven’t showered for two weeks). All of us badly miss our families. Wei’s computer plays “Hey Jude,” then another hour of Beatles medley. Rachael’s plays Irish ballads: “Fare thee well, my one true love, although I am far away.”

Turkey_rock

For dinner, we have no turkey, only this turkey-shaped rock. Wei and Mie make chicken chile. They compare notes on holidays in China and South Korea.

After dinner, the helo ops calls. The helo is on its way to pick up everyone. With no time to waste, it will swoop down like a Valkyrie to scoop up everyone, with propellers running.

But students have showered in the sample water, while others are out at Lake Hoare after Thanksgiving dinner, well hydrated but in no condition for a hike, if you know what I mean. So at Bonney they rush out to the ice hole to quickly get more samples. Sure enough, around midnight the helo swoops down through the valley, stopping at Lake Hoare to pick up the well-hydrated scientists, then back to Lake Bonney.

Now the Valkyrie has a pit stop. A mechanic was brought to fix the original helicopter, long parked on the helipad. Stepping out, the first thing he does is snap photos; he’s never seen this lake before. Meanwhile, we cannot leave until the original helo is flying. The mechanic’s work takes three hours.

Mechanic

Much of this time the mechanic spends lying on the top of the helo; you can see his boot hanging down. He is amused by the parking ticket, although the helitech says he will contest the charge of double parking.

It occurs to me that the mechanic is really the most crucial part of the whole science operation. The mechanic’s work has to be perfect, otherwise none of us can survive out of the valley. In fact, huge numbers of other essential support personnel in McMurdo toil in the background supporting our mission. This will be the subject of my next post.

Fixed_Helicopter

One more salute to East Knox High School. Like this helicopter, you have endured many challenges and setbacks; but the Bulldogs will prevail.

Next: Mactown–Special People
Index: Antarctica

 

Three Helicopters and a Floating Rock

November 25, 2014

Helicopter 1

As we recall from last time, Amy was really excited for the limnology team to fly their samples back to Mactown. The NSF helicopters are a precious resource; only five of them available for the entire Antarctic operation, and expensive to operate. And they are essential for the science. Some experiments require live lake samples immediately flown out to the lab in Mactown to run experiments; otherwise, the microbes die and are useless. All experiments generate samples stored in bulky ice or dry ice containers; sometimes multiple helo runs are needed to take them all.

Here is the awesome Bell 212 helicopter that descended from the heavens to the helipad to pick up everyone and everything. Helicopters are the gods of this region; we had to watch a training video, on approaching the helo with your head bowed (to avoid the spinning propeller overhead) and never to so much as look at the invisible tail propeller. So this visitation from above was truly exciting. We all pitched in to haul up the samples and sleepkits, and computers in backpacks uphill to the sacred helipad. Here’s how it looked:

But wait–what’s that second little helicopter? Helicopters are notoriously difficult to catch on video; they just pick up and go without notice. To capture two helos landing together, out in the middle of nowhere, is like getting visited by Zeus and Athena at once (you can tell I miss Michael). The second one, a tiny A-Star, came to pick up a sling crate from this lake to cart off to another frozen lake. The A-Star actually landed on the ice. Rachael ran out on the ice to hook the sling load, and the A-Star took off with it. A short while later a third A-star landed on the ice to cart one scientist with gear from one lake to the next; after that I lost track.

While all the gear and samples were being loaded, the helicopter pilots came down to the Jamesway to chat (and keep warm, as they don’t wear Big Red). The pilots are totally awesome professionals, dedicated to picking up people and samples from one lake and depositing them at the next one, or at Mactown; it’s a lot to keep straight. Also (for Wendy’s benefit) they are extremely good lo0king.

One of the pilots spent a long time on the radio checking to make sure they were taking the right stuff to the right places. At this point is where our good luck ran out.

First, the pilots discovered a huge oil slick spreading on the helipad, and a tank was empty of oil. So the helo wasn’t going anywhere until a mechanic was flown out. Steve Arnett–Where are you? Since I’m here, this is a Kenyon operation; you need to send Dave Boughter out here to fix this helo.

Then we learned that in Mactown the weather had turned. There was snow and zero visibility, and all helos were cancelled for the rest of the day. Interestingly, we could see the weather for hundreds of miles around; first, looking west into the mountains, you can see the weather is clear. Then, looking east toward McMurdo (about 75 miles) you can see the snowstorm. As for here in the Dry Valleys, weather only varies from wind to more wind.

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The camp members swore they’d never seen a broken helo at Bonney Camp before. The pilots got out somehow, but the rest of everybody had to stay another day. The grad students planned new experiments, edited manuscripts, and watched The Big Bang Theory.

Meanwhile, Rachel’s team had a big day planned collecting samples from West Bonney. We will compare the population density and species at different depths of water. As we traveled the ice west, the banks got steeper, with piles of rocks like a child’s tower of building blocks. Occasionally there was even a rock “floating” atop the ice. You can see this one, carved by the wind into beautiful forms. It’s about the size of a Volkswagon.

Rock

A small amount of thought leads to the conclusion that, despite the high salt concentration of deeper water (the Bonney lakes started out as part of the ocean thousands of years ago) it is not possible for the volcanic rocks of this region to actually float on water. The inescapable conclusion is that this rock must have got onto the ice from somewhere, most likely by rolling down the mountainside. I notice many similar rocks perched on the mountainside above our tents, but Rachael insists these will never roll down into our camp.

Chris_Rachael_Sa,[;omg

Out on the ice, a “polar haven” is a small hut above a hole in the ice, where samples can be collected. Chris and Rachael sent down a Niskin bottle, a bottle with a hole at each end so the water flows through. After the bottle reaches the right depth, a “messenger” weight goes down to release the latch and close both ends so the water can be hauled up. For this operation I ran the winch; it was fun though it wore through my glove liners.

Niskin

Back in the green camp lab, Wei concentrates samples by filtration, 1000-fold. There are a lot of samples from all the different depths, and filtration takes a long time. These samples hold crucial information for Wei’s PhD thesis.

Wei filtering

Now I can search the samples for interesting microbes, using the Cellscope, on loan from Frankie Myers at Berkeley. The Cellscope is completely portable; it uses a cellphone to record a sample at 200X. It was designed for telemedicine from remote regions. Thanks, Frankie!

Cellscope

From West Bonney, the Cellscope reveals these curious little algae (cells enclosing round organelles). These cells associate with each other, for an unknown purpose. Perhaps, like our team in the Jamesway, they somehow support each other living in brine at 4 degrees C, with what little light penetrates the ice.

Microbes

The limno team is frustrated but in good spirits after their day of revised plans. They post a parking ticket on the grounded helo.

Next: Thanksgiving in a Tent
Index: Antarctica

Bonney Camp

November 24, 2014

So what does Lake Bonney Camp have in common with Cuba? We’ll soon find out, but first, let’s take a look at the camp that supports all the work of the scientists.

Camp_Map_Labels

First, here is a labeled map of all the key features of the science camp at Lake Bonney. From left to right (arrows):

  • Helicopter landing pad. This is where the totally awesome helicopter lands to deposit scientists, gear, and food; and to pick up scientists, exciting new samples, and human wastes.
  • Research lab. This small green building houses filtration for lake samples, fluorimeter to measure photosynthesis, and other instruments for three or four research groups.
  • Survival box. This yellow box contains extra sleeping bags plus 40 days worth of dried food. We found out why—sooner than expected.
  • My tent. This is where I sleep at night, below freezing. Other tents scattered all over are where others sleep.
  • The Jamesway. A reconverted army unit for kitchen and social activities. Where we seem to spend most of our time—more than expected, when the weather turns.
  • Outhouse. Two different seats for liquid and solid waste. Not a drop to be left. Somebody peed hiking up a mountain, and Mactown (McMurdo) had to send out a full environmental hazard incident crew to clean it up.
  • Solar panels. How we get much of our energy, though not all. Wish we had more of these.
  • Helo loading box. A sling-loading box had to go out today, packed with equipment, sleep kits for departing scientists, and hazardous waste containers. I’m looking forward to learning this technique.

Jamesway

The Jamesway is where we all cook, read email (when it’s up) and generally socialize. Also where we all check in every morning. If somebody doesn’t check in for Bonney Camp at the required time, every day, about 50 responders get notified and all heck breaks loose trying to rescue us. At left, Mie is a member of the limnology chemistry lab, directed by John Priscu (back home). Next to her, Wei is in Rachael’s lab. At left, the blonde guy is Steve, with the limnology lab. Dimitri (dark hair) cooked us an amazing chicken with broccoli and mushrooms.

CookingThe whole group often cooks together. Here, Mie cooks Pad Thai while Chris helps Amy make a birthday cake for Ben (everyone was told to hush so he wouldn’t know, while climbing over the rest of us). Amy Chiuchiolo (Priscu lab director) is in her eleventh season, extremely peppy and keeps everyone going, a lot like Michelle Clark home at Bacteria Lab.

So what is a Jamesway? According to Wikipedia, Jamesway is a version of an army Quonset hut designed for arctic weather. The hut is made of wooden frame with insulated cloth covering. A wood stove keeps us toasty warm.

This particular Jamesway actually saw action in the Korean war. The date of construction:

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We know the hut saw action because the cloth ceiling still has bullet holes:

Bullet_holes

The bullet holes remind me of Cuba, where I saw their revolutionary museum still has the bullet holes from when Battista escaped. Apparently our Jamesway got strafed by enemy fire back in Korea. Then it got put in storage, until use for the NSF Antarctic program. This says a lot about the Antarctic program—Mactown looks like a military camp (think Avatar with bizarre large-wheeled vehicles milling around) and all the vocab is military based. Optimistically, think of swords into ploughshares.

Ice

How do we get drinking water? We go up to the glacier and saw chunks of ice to thaw on the woodstove. The water for drinking gets filtered.

Cake_AmyAmy frosts Ben’s cake, triple layer chocolate with amazing frosting that would have had vanilla if there were some. Then she shares an enormous photo album of all the birthday cakes she has baked for family and friends. The Jamesway is quite full of people now–Even Jill Mikucki drops by, a colleague of Erik Zinser (my old Kenyon Honors student) at UT Knoxville. Hi, Erik!  Jill studies bacteria from Blood Falls, the red-colored frozen flow from the glacier at the end of West Bonney. Lots of iron there. 20141123_033540

My, what a lot of people have dropped in for Mie’s dinner and Amy’s cake. The Jamesway is getting pretty full. Amy and her group are excited to be moving out tomorrow with all their great lake samples to analyze.

Next: Three Helicopters and a Floating Rock
Index: Antarctica

Frozen Waves in Volcanic Desert

November 23, 2014

Lake_to_MountainsFrozen Lake Bonney is where we are seeking protists (single-celled life with traits related to animals or plants). At either side rise the mountains of Taylor Valley. During summer, streams flow down the mountainsides from melting glaciers. The rest of the year, the water sits there, freezing and subliming, shaping unique contorted forms that persist throughout the year. The cracked and frozen surface looks forbidding, but with “stable-icers” on your boots, it’s easy to walk across.

 Lake_hatDifferent parts of the lake show different unique ice features (hat for scale). This patch of ice looks like cracked-open styrofoam, with many pockmarks tinged with volcanic dust. The dust is dark, so where it settles it absorbs light and heats the water, melting a little hole, which then collects dust and melts more. But the holes remain small, whereas the ice is nearly 4 meters thick.

Our field team is studying microbial photosynthesis. The photosynthetic microbes grow in water beneath the ice, using light that filters through. There are many different species of phototroph (organisms that conduct photosynthesis). Rachel’s team has isolated two unique species, one a green primary alga Chlamydomonas that grows only with light; and an Isochrysis, called a “secondary alga” because it evolved as a food-eating protest than engulfed a green primary alga. Isochrysis can grow without light by eating food such as the remains of other protists.

Isolated species of protists can be cultured within the lake environment, through a hole drilled and melted through the ice (Rachael’s blog).

7386567_orig

Samples_GreenRachel is culturing the two kinds of phototrophs  together, in the lake environment, within dialysis tubes that permit nutrients and minerals from the lake to reach the trapped microbes. The idea is to show which grow better, at which depth in the lake. We predict the Chlamydomonas grows best near the surface, whereas the Isochrysis does best at the mid-level depth (15 meters). You can see how green the cultures look, with all their chlorophyll.

Chris_seated

Here, grad student Chris Sedlacek adjusts the sample holder. Chris is a very kind, helpful Canadian from Rachael’s lab. A great team-mate for Rachael and Wei.

Besides Rachael’s team, there are two or three other teams coming and going at various times. We all use the same camp facilities and take turns cooking and cleaning. More on the camp, and the lab analysis, to come. And a riddle: How is  our camp like my Cuba tour, two years ago?

Next: Camp life
Index: Antarctica

Dry Valley: Mars On Earth

November 22, 2014

Today, after dozens of training videos, I finally joined our research team in the Dry Valleys–one of the most sensitive protected regions of Antarctica. Packed like sardines, our helo flies across the Ross ice, then up Taylor Valley, passing the Kukri Hills of the Antarctic desert. You can see how steep they are, and how the snow is thinning out. Glaciers surge down between the hills, then we reach frozen Lake Bonney. The white stuff is like frozen foam–hard as glass, vicious if you fall. Our camp appears below: the Jamesway, then the lab (green box-like thing).

The scientific interest of the Dry Valleys is that they resemble Mars more than any other place on Earth. Looking south of Lake Bonney, the Kukri Hills rise above the sandy slope, strewn with boulders carved by the wind. To the west, a dozen glaciers flow into the valley, though most dry out in the wind before reaching the lakes. North rises Mount Thomson, with scarcely any ice or snow. Then east, the valley continues toward the Ross Sea and McMurdo Station.

Helo_Camp

The helo has landed in the camp. We unload food, supplies, and my tent. Everyone sleeps and dresses within individual tents dotted around the lake, at well below freezing temperatures.

Terrain From the mountains flow several small glaciers. But the glaciers all dry out before they reach the lake. The terrain is full of beautiful volcanic rocks, red, gray, and chocolate brown. The tents dot the landscape at spots specified by regulation, to avoid disturbing the landscape more than necessary. Not a rock may be carried off site.

Rachel_Samples

Rachel checks out the sample cultures of photosynthetic microbes growing in the lake. For more on the research, see Rachel’s field blog.

Next: Frozen Waves in a Volcanic Desert
Index: Antarctica

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