With the start of the diurnal tide on November 21, Kim and I have gone out sampling every day that we can. We have had several successful days, completing all 26 GPS points on our sampling grid. In addition to good sampling, we have been able to see lots of wildlife. Minke whales have surfaced several times off in the distance, penguins often swim past us, and the other day we saw a leopard seal napping on a piece of ice! It was too bad neither of us brought our camera that day.
The Laurence M. Gould pulled into station on Saturday, and left on Sunday taking with it some fellow Palmer Station members from the University of San Francisco. We will miss them here on station and in their honor completed another polar plunge!
In addition to the Gould, we had some other exciting visitors at Palmer Station this weekend! The Spirit of Sydney, a 60-foot Antarctic expedition support yacht, pulled into Arthur Harbor on Saturday. The crew of the Sydney has several things on their agenda. In celebration of the 100-year anniversary since Roald Amundsen reached the South Pole, the crew will be skiing onto the Antarctic continent and being the first to set foot on several mountains. The crew is also supporting an environmental campaign to “Sing for the Penguins” of Antarctica, where everyone is encouraged to give a tone to the penguins. All the tones will be put together into a grand choir and played for the penguins in a concert.
A few of us were able to take a Zodiac out to the Spirit of Sydney to meet the crew and see the ship. It was a really neat experience getting to see how they live, hear some stories, and learn all about their mission.
The other day I went out with the phytoplankton group from the Rutgers University Coastal Ocean Observational Lab to release one of their Slocum Gliders.
Gliders are released in harsh environments (like Antarctica) to make real-time observations when it is too dangerous to send out a human. They measure things such as dissolved oxygen, temperature, and chlorophyll (a measure of phytoplankton biomass) over large spatial domains. As the glider travels it dives up and down taking measurements, surfacing to send its coordinates back to the lab.
To release the glider we loaded it into a Zodiac and head for Outcast Island, one of the outermost islands surrounding Palmer. We then continued on for about a mile to give the glider a wide berth; you have to release them far away from land because they take a very long time to turn (rudder on the tail). We then attached a buoy and rope to the glider for a test dive, after its successfully completed that (with instructions sent via satellite from Rutgers) it returned to the surface and we took off the rope and let it go for good.
Sadly, that day the glider didn’t do so well, it was swimming backwards and the phytoplankton group had to retrieve it. However, since then it has been released again and is successfully navigating itself around Palmer Canyon.
Several things were in the works at Palmer Station this week. The RV Laurence M. Gould docked at station to bring two new scientists who are studying birds down here in Antarctica. The Gould only stayed for a day, as it needed to continue on to conduct a research cruise with scientists on board.
The arrival of the ship meant a busy day here at the Station; several of us formed an assembly line across the ship and gangway to help unload cargo. And of course, everyone was excited to have new “freshies” (fruits and vegetables)!
There was a bit of a setback with our Towfish—a piece of plastic where the cable connects to the echosounder broke off. However, we had the part on Station and thanks to our Instrument Tech the Towfish was ready to go the next day! Kim and I took it out for a test run and found that everything is working smoothly once again.
This Sunday we had great weather, which allowed for lots of recreational activities on everyone’s day off. Here at Palmer you can go boating, hiking up the glacier, skiing and snowboarding, camping, or just explore around the rocks in the backyard.
This week several groups went out recreational boating. My group went around to different points, getting a good look at the glacier and the Bahia Paraiso (a sunken cruise ship). We hoped to see some leopard seals, but instead were able to see a family of elephant seals on Torgersen Island.
In addition to elephant seals, Torgesen Island is home to several penguin colonies. I was lucky enough to see some eggs, which look like a pale yellow tennis ball under the penguin. We also saw several skuas, birds that prey on the penguin eggs and young.
Now it’s time to hope for additional great weather and sampling days! Starting November 18, Kim and I need to sample everyday as the diurnal tide rolls in.
Due to some of our sampling destinations being outside the normal 2-mile boating limit this year, Kim and I were required to participate in additional boating training.
We have the boating limit here at Palmer Station because of the amount of time it takes for help to reach you in the event of an emergency. Inside the normal limits, the Ocean Search and Rescue (OSAR) team can reach you within 10 minutes. However that amount of time lengthens the farther out you are, and extended training allows you to know what to do until help arrives.
For training, Kim and I took turns putting on an immersion suit and jumping overboard into the water to await rescue. For the first jump, the person in the water is conscious and able to help you get them back into the boat. The second time, however, the person in the water pretends to be unconscious and the person rescuing them has to try to get their body as high up out of the water as possible and lash them to the boat with rope or bungee cord. Since it is only Kim and I boating together, we needed to feel prepared to rescue each other and know what to do in that situation.
I feel much more comfortable now driving the boat right up to the overboard victim and getting them onboard. We will both be very focused on staying safe and inside the boat!
After a week of work, we celebrated Halloween at Palmer Station last Saturday. It was really fun to have everyone together and to see just how creative everyone was with their costumes.
Luckily, there was a break in the high winds and sea ice, so Kim and I were able to accomplish several things this past week! We were able to go out sampling a few times, allowing me to learn more about our equipment and earn some boating experience.
So far we have seen several krill aggregations on the echo sounder, and yesterday we were lucky enough to see the krill themselves swimming around under the brash ice! At the moment there are only juvenile Antarctic krill (Euphausia superba) in the area, but later on in the season we expect to see more of the large adults. Antarctic krill can live for 6-8 years and can grow up to 60 millimeters in length.
A group of scientists from the University of San Francisco studying phytoplankton, led by Dr. Deneb Karentz, actually caught some krill in one of their net tows and much to our appreciation, brought them back for us! We measured the krill lengths, which we then use with the acoustic data to calculate krill biomass and abundance. All of the krill measured were smaller than 20 millimeters, which means they are most likely a year old. We have also seen a lot of foraging activity from the penguins and seabirds in the area, it looks like it might be a good year for krill!