Polar expedition AeN JC3 – maps and numbers

This article is part of the series “2022-02: Winter cruise KPH”.

Just some short info for the people who like maps and numbers.

This is the route of the icebreaker Kronprins Haakon on the polar expedition Arven etter Nansen JC3:

The northernmost point 82.0474°N
The southernmost point 69.5245°N
The westernmost point 07.6551°E
The easternmost point 34.1262°E


And some weather records (when my python script is right):

minimum maximum
Temperature -30.5 °C +2.0 °C
Wind speed 0.1 m/s 32.7 m/s
Wind speed on ship 0.1 m/s 30.9 m/s
Wind chill -48.0 °C +1.0 °C
Wind chill on ship -49.0 °C +1.0 °C


And some personal numbers:

Been on the sea ice 7 times
Photos taken 4084
Cakes eaten countless

Polar expedition AeN JC3 – day 17 and 18: An incredibly beautiful day on the ice

This article is part of the series “2022-02: Winter cruise KPH”.

Day 17 and a bit of 18 · 7 and 8 March 2022

7 March

We have arrived at a place somewhere between Svalbard’s second largest island Nordaustlandet (14.443 km²) and the easternmost island Kvitøya (682 km²). No one lives permanently on these islands.

The ice experts have found an ice flow and examined it. The ice near the ship has some holes so the dress code is survival suits for the first time. In opposite to the formerly used Regatta suits they have attached boots and neoprene arm and neck cuffs. They shall keep you warm and dry in case you fall into cold water – or in our case break through the ice.

I am very interested to join and observe ice coring, a missing link on this expedition. I wasamhowever quite doubtful whether I will be allowed to enter the unreliable ice on this station. But I am lucky again, I may follow M. and L. onto the ice.

Earlier I was told that I may join the scientists taking ice cores but won’t get the opportunity to take ice cores by myself. That’s understandable. To my huge surprise – and delight! – plans were changed: L. shows me how to do it once and then it’s up to me to take five more ice cores. Give me snow or ice and something to play with and I’m happy ;-).

No, I’m no experiences ice corer after five cores. But at least I get an idea and a bit of a routine. In measuring snow depths, ice depths, the freeboard and writing down the values with a pencil. In mounting the large ice core attachment onto the electric drill and removing it after coring. In putting the ice core onto the gutter-shaped cutting board without flooding the electric drill or touching the snow (happened once – sorry!). While M. is cutting the core into slices and putting them into wide-necked plastic bottles I continue with my work. And I have to continue, because I’m still slow and M. shall not wait too long. I think, I could do that for weeks. Standing on the ice and drill cores out of the sea ice.

I have asked Pernille to take some photos from me while coring. These are probably the only photos that prove that I actually did something on the expedition beside of taking photos.

Photo credit: Pernille Amdahl, Nansen Legacy –tusen takk!

And the afternoon? I am allowed just to go onto the ice once more as long as I find some team lead to join. I find one and so get my 7th opportunity on this cruise. Two and a half more hours on the ice. I overhear a radio message. No polar bear warning but the information that our ice flow drifts with more than 2 km/h and the water depth is decreasing. This could damage instruments when they are too deep in the water.

Just some more photos:

And later, when we are on the ship again another polar bear approaches. This time it is a curious one that is very interested in the scientist’s equipment. And since it could harm the bear when it eats cables or plastic it is shooed away with a flare gun. **BANG**. It gallops some metres and then walks away. No polar bears were harmed and as far as I know no cables.

By the way – it was a good decision to use the survival suits. One of the scientists went through the ice today. All of a sudden and quite near the ship. It did not take long to pull the scientist out of the water but without the survival suit this would have been a very wet, cold and unpleasant experience.

8 March

The next day some additional measurements are done on the ice and then we leave last ice station of Arven etter Nansen JC3.

Ha det bra, Arctic sea ice. Farewell! It was a great pleasure to meet you and I definitely will miss you!

Polar expedition AeN JC3 – day 14 – 17: Travelling south

This article is part of the series “2022-02: Winter cruise KPH”.

Day 14 – 17 · 4 – 7 March 2022

4 March: after our second polar bear encounter we leave the ice station P7 at the 82th degree of latitude behind and slowly head south.

This journey will take more than two days although its only 250 km to sail. That’s because many scientific activities go on. Not from the ice but from the ship. Just an excerpt from the activity log:

  • CTD with water sample (19×)
  • Box core (4×)
  • Håv-trekk stasjon (2×)
  • Multinet (2×)

I help the benthos people in the lab and learn a lot, I discuss data matters with scientists, I edit photos. At the same time the character of this polar expedition has started to become a bit more leisure-like. A “no-talent show” is organised as well as a table tennis tournament. A quiz evening takes place and J. shows some of his favourite movies. And from time to time I stand on the helicopter deck and take new photos.

7 March: In the morning we arrive at a place between Svalbard’s second largest island Nordaustlandet and the island Kvitøya, that we already passed a week ago. Here we will have a last 24-hour ice station with the adhoc name SIce Kvitøyrenna.



Polar expedition AeN JC3 – day 11 · transit to P7

This article is part of the series “2022-02: Winter cruise KPH”.

Day 11 · 1 March 2022

Today is travel day. Our destination is station P7 (82° N, 30 °E), further north than Svalbard and even Franz Josef Land.

From the documentation of Nansen Legacy (Arven etter Nansen):

P7 – Located in the deeper Arctic Ocean. P7 is suitable for comparing the shallow Barents Sea with the deeper Arctic Ocean. P7 will have extensive sea ice coverage during winter, and varying sea ice cover during summer. P7 might be suitable for geological coring.

When we arrive there the sea ice is a bit thin. Therefore we continue a bit further north where we find a suitable ice floe. So, tomorrow: the second ice station of this cruise.

Some ice photos from this day:

(Photo 5 and 6 are switched for layout reasons)



Polar expedition AeN JC3 – day 10: twice on the ice and a sudden end

This article is part of the series “2022-02: Winter cruise KPH”.

Day 10 · 28 February 2022

Today we continue with ice station at P5 – short for “Process study station” at approx. 80.5° N 34° E.

To my delight I can join the scientists A. and B. on the ice this morning. Great! First they will do a transect measuring ice and snow depths along a path, then A. will examine snow. I will join them but without a specific task.

Right after breakfast the preparations start. We all have to dress up and equipment as well as snowmobiles have to be lifted from deck onto the ice. And then I stand on the Arctic sea ice a second time.

It’s -12½ °C, wind 8 m/s– good conditions for taking a walk. But before we start instruments have to be set up and activated.

While B. sets up the GEM-2 device, a multi-frequency broadband electromagnetic sensor to measure ice thickness, something happens. Our polar bear guard J. breaks through the ice. First up to the thighs, a second later to the hips. Exactly on the very snow mobile track that all use to walk to the different places. It could have happened to any of us. J. is lucky, he pushes himself out of the hole way within seconds. After this incident the ice hole is examined and the weak parts are removed. Now it is 2 m long but hardly 50 cm wide. Later it will be marked with flags to prevent others falling in.

J. stays almost completely dry and does not need to change clothes. So our small transect caravan is ready to depart.

  • A. comes first. With each steps he pushes the long staff of the Magnaprobe into the snow to measure and track the snow depths.
  • B. comes second. She pulls the pulka with the GEM-2 that continuously measures ice thickness as well as position and time.
  • J. comes third. As our bear guard he has a rifle on his pulka and safety equipment. He has to keep two metres distance to B’s pulka, the GEM-2 is sensitive.
  • I come fourth. I just follow in the same slow pace – slow enough to take some photos. I do not dare to leave the track after J’s involuntary “bath”.

Our destination is that black flag tied to the bamboo pole over there. How far it is? On the sea ice I do not have any clue. It could be 100 metres, it could be a kilometre. Distances are hard to guess.

Our walk takes only 45 minutes but is extremely impressive. We leave the ship behind, therefore I only see the others, the sea ice, clouds and the low hanging sun that illuminated this Arctic scenery in the warmest colours. The next image is one of my favourites, but it cannot reproduce the „North Pole“ feeling I experienced on our triangle formed walk.

When I wrote „North Pole“ I started to smile. Yes, I would love to visit the North Pole someday. I doubt however that it looks different there than here. Being part of this quite inaccessible Arctic landscape  touches me deeply and I’ll never forget this impression. I envy A. and B. who will walk a lot on this expedition, mostly by foot, sometimes by skis. I cannot imagine a better job than doing this.

Are we on the ice the whole day? No. There’s breakfast 7:30–8:00, lunch 11:30–12:30 and dinner 17:30–18:30. At meal times there is no polar bear watches and so no people on the ice neither.

After lunch I am allowed to be on the ice a 3rd time, helping. I am in doubt if we are actually able to step on it because it became windier and the visibility was mediocre. And visibility is needed by the polar bear watches.

Visibility doesn’t seem an issue and soon I stand on the sea ice again. I am sent to another scientist that may need my help. Well, not yet– so let’s take a few short snapshots.

While I try to figure out how I can help someone is coming to us and says: „Grab your stuff and leave the ice immediately!“. I want to fetch my backpack but cannot find it. Probably someone else already took it. So I head back to the icebreaker – it’s near – where equipment is already loaded back to the ship. And there’s the backpack.

Soon I am on board again and learn what happened. It was not a polar bear as I suspected but a crack in the ice. It came from the distance and started to split our ice floe fast. The crack was not threatening us directly but a clear signal, that the ice is not safe anymore. Here a photo from one of the upper decks:

Later this day a small team in survival suits takes down the tents and fetches the rest of the equipment.

For me that feels like an extraordinary incident but the affected scientists take it easy. Seems to happen frequently. Some admit that they were surprised that this ice floe held so long. I do not say it loud but think for myself that I would have preferred wearing a survival suit to the Regatta suit to keep dry in the case of breaking through, but that’s not up to me to decide. And still – I do not have any experience on Arctic sea ice.

What shall I say. Two days ago I was afraid that I was not let on the sea ice and now I already have been there three times. I am very grateful to the cruise leader that gave me these opportunities while handling a zillion other things – many of them really important – at the same time! Thank you, G.!

Polar expedition AeN JC3 – day 9: P5, the first ice station

This article is part of the series “2022-02: Winter cruise KPH”.

Day 9 · 27 February 2022

Yesterday we have arrived at P5, our first ice station. In the night the ship left the ice for some plankton nets and trawl. Today morning it carefully moves back to the chosen ice floe. After breakfast the activities on the ice will start. A station with a tent quite near the ship, another one some hundred metres away and A. and B. who do transects of ice and snow depths will wander around somewhere. (A transect is a path along which a series of measurements of the same type is performed.)

A lot of people will be on the ice but not me. The meeting of the previous evening revealed that I will not the enter it today and my status for the next day (tomorrow) is “additional”. Although I understood that the cruise leader did not want to send all people directly onto the ice – especially since it is not very thick – I was disappointed.

After the meeting I tried to ask the cruise leader for the reasons but I communicated quite demanding and stressed her unnecessarily. Today I apologised to her. Even while I write this article I am ashamed for my behaviour. That was not my best hour.

Today I will be involved in the ice station anyhow, but from the ship.

Polar bear watch

Here in the northern part of the Barents Sea we are in the habitat of ursus maritimus – the polar bear. These animal are threatened and need our protection. At the same time they are dangerous and we have to protect ourselves. So the most important thing – both for humans and polar bears – is to avoid encounters on the ice.

That’s where the polar bear watches come in.

Before anyone may enter the ice already three polar bear watches stand on the bridge on deck 8. Each watch has a segment of ca. 150° to watch so that the segments overlap. Than the polar bear watch will have a single task for one hour: constantly watching the segment – with and without binoculars. As soon as a polar bear watch discovers a polar bear on the ice he/she uses the handheld VHF, a two way radio to make a radio call, for example “Polar bear at 10 o’clock, 1000 metres, moving to the ship”. All team leaders and ice bear guards and the cruise leader have a VHF as well and can discuss plans that mostly will result in leaving the ice.

Today I will have three polar watches. 9:30, 12:30, 14:30 +2h. Since I know that this task is very important I am quite nervous while I walk up the staircase to the bridge.

At least the windows that still were salt-encrusted from the storm two nights ago are cleaned. Good for the visibility.

The VHFs are also used to sign in and out people on the ice. As soon as someone enters it a call is emitted: “Bridge, bridge, this is A. B and C on the ice”. The same procedure when people are back on the ship. The person in charge is also on the bridge and will move magnets on a chart to keep track. A bit like a non-magic version of the Weasley Clock in Harry Potter. (Thanks Annika for this metaphor!)

At 9:30 I start my first watch at the port side of the ship. It is a good beginner place because it is farthest away from the ice stations. For one hour I constantly scan the ice from the open water at the stern to the ice at the bow. Sometimes I use the binocular and scan the horizon, sometimes I use my naked eyes to get a better overview. Sometimes I look down to the ship. Some of the ice floes look like polar bears but first they do not move (and soon I know them by heart) and then polar bears are not of this cold blueish white but more a yellowish, creamy colour.

These photos I made after my watch. My job is to watch the ice, not to take selfies for this blog or mobile photos through my binoculars. Yes, I use my own, because I love them more than those on the bridge. I realise that I own these binoculars for almost 40 years. The oldest piece of equipment I brought on this polar cruise.

The biggest challenge: Do not think! Don’t follow your thoughts. Because then you may still look through the binoculars but without paying attention. The 59th minute you do the same as in the 1st minute. Watch the ice. Watch the ice. And again, watch the ice!

So that’s my day. Watch the ice. Take a nap. Eat lunch. Watch the ice. Relax. Watch the ice. Fight tiredness. Eat dinner. Until …

MSS casts on the sea ice

… the cruise leader comes to my chair while I am eating fish, potato gratin and beetroot. She asks me if I was ready to go on the ice at seven. Tomorrow? No, today. What? I mean, of course! I shall follow Z. who will do three MSS casts to measure CTD (conductivity, temperature, depth) and turbulence in an ice hole. I shall dress very warmly. The first opportunity to be on the ice and see how this measuring works. Wow!

At 19:00 I stand outside on the deck waiting for the others. I have to stand outside because I’m dressed in two layers of wool and this non-breathing Regatta suit and I already started sweating while changing clothes.

Half an hour later the snowmobile has left me at the green tent. Officially I only got 30 seconds for taking photos – every extra minute will extend the observation time of the three polar watches – but since Z. has to do some preparations I have some minutes to take snapshots in the dark. And to feel very happy.

Then it’s my turn to help. While letting down the MSS needs some experience pulling up is just some mechanical work. Z. did the first one, I do the two others. Z. observes the computer display and signals me when I shall slow down. All I have to do is winding up. Easy work and time for a chat.

After the three measurements Z. is content and calls K. to fetch us with the snowmobile.

This activity from ship to sea ice and back to ship took less than an hour but I will never forget it. Standing in the dark on the ice of the Barents Sea on a place nearer to the North Pole than to my work town Tromsø is just impressive and I feel that I have a strong relation to it.

Next time however I will dress less warmly. It was only -15 °C outside and I had too much clothes on. Alone the Regatta suit is warm and the tent was heated to protect the sensitive electronics.

And you? If you had such an opportunity would you take it or do you prefer warmer locations?

And to those of you who have such an opportunity for me: contact me asap.

Polar expedition AeN JC3 – day 7 and 8: a stormy intermezzo

This article is part of the series “2022-02: Winter cruise KPH”.

Day 7 and 8 · 25 – 26 February 2022

25. Feb 07:00 – testing clothing concepts for extreme cold weather

Another Arctic morning. It has become slightly warmer with temperatures round -24 °C but at the same time a lot of windier. The average wind speeds of 20 m/s and above. So windchill is still -45 °C and I wonder how to dress just in case I will be on the sea ice the first time this night. No, I do not count on being allowed to enter it under such conditions but you never know. Be prepared and wait …

For safety reasons we always have to wear a special suit on the ice in case of someone breaks through. That’s either the Regatta suit, a floatation suit. This acts as a full body life vest giving you buoyancy in the water. However you will get wet instantly. No big issue because we will always be quite near the ship and conditions are ok. If the circumstances are more extreme or the ice is not trusted a survival suit with attached rubber boots is used. It will keep you completely dry as long as the arm and neck cuffs are tight. It is said however that it is uncomfortable to wear and you easily get very cold feet.

So, let’s get dressed. For the first time I put on the Regatta suit. It is as breathable as a rubber dinghy so you should not sweat too much. Over that, more for the fur hood than the warmth the Canada Goose parka. Yes, I can still move ;-)

Dressed like never before I open the thick door to the helicopter deck and stagger outside. Whoa! That’s some rough weather. I instantly feel every single square millimetre of skin that is still exposed to the wind and even that the zipper of the down pants are not completely closed at the bottom although I wear high rubber boots. In my opinion the hood of the Snow Mantra is ingenious but the gusty storm just pushes it aside in all directions and I can hardly see anything. So I do not check if the selfies taken with the Nikon and three pairs of gloves and mittens are in focus. They are not.

Being in again I understand the first time, why the parka hood is not only fur-trimmed but have this thick fleece rim inside. It keeps away the ice dust that the storm blows in.

The combination of Regatta suit is too warm and too bulky. I test another combination with the shell jacket of the Norwegian Polar Institute and ski goggles. Insight 1: if the hood does not fit perfectly it is completely useless in the storm. Insight 2: my old ski goggles freeze over so fast that within a minute I am functionally blind. I have to remove them to find back to the helicopter hangar. While checking this the storm pushes me around on the deck slippery deck. I really doubt if anyone wants to work on the ice in these extreme conditions. On the other side I do not know anything about polar research. Neither about polar researchers. It’s me who is the newbie.

25. Feb 11:00 +2h – planning for the storm

Aside: The day before we changed the ship’s time to take better advantage of the daylight. When I write +2h it means our privately shifted time. Otherwise it means „normal“ CET time zone.  If you don’t care, just ignore it.

We have a meeting before lunch. A storm approaches. We will seek shelter between Nordaustlandet, Svalbard’s second-largest island and the island Kvitøya. Conditions are too rough for an ice station. Although all four ship engines are running we hardly make progress. There is no time schedule anymore. We just have to sit it out.

25. Feb 16:20 – the swell wracks the ice

At 15:20 I take a long afternoon nap while Kronprins Haakon struggles through the ice. I have on of the frontmost cabins on deck 3 –the noisiest ones. The icebreaker is rumbling, rattling, grinding, squeaking and doing many more noises that I do not have words for. I lie in my bed and feel the mattress vibrating, shaking, bouncing. And I love it. For me it is like an Arctic lullaby and as mostly I fall fast asleep.

z – z – z – z – z

After an hour I wake up all of a sudden. Something has changed. The ship is slowly and strongly pitching. At the same time noises and vibrations are absent. Are we in open water? What happened!?

I have to compensate the ship’s movements while I walk to the dayroom. I peek through the ice crusted windows. Yes, we are in open water. J. sitting there tells me that 10 minutes ago swell waves. They broke up the ice within minutes and now the ice has disappeared. Impressive and a bit frightening, too.

Now we are amidst the storm with an hourly average of 24.2 m/s, that’s round 87 km/h. The highest wind speed measured in this hour is 32.7 m/s, that’s the exactly beginning of Hurricane force or level 12 on the Beaufort scale.

Although the ship is stabilised it is pitching, rolling, yawing, heaving and a lot of people have started to get seasick. I feel quite ok, but a bit stressed and tired. After a while I decide to lie down for a quarter. Good idea! I feel better again after that.

I’m in the day room again, watching the dark waves through the ice encrusted windows . Sometimes the spray splashes up many metres. No, I won’t enter any outside deck today any longer!

25. Feb 19:24 – crossing the 80th degree of latitude

I wanted to see on the digital nautical chart how we cross the 80th degree of latitude but I miss it by some minutes in time. Soon I go to bed quite curious how the next day may look like.

26. Feb morning – Kvitøya

06:10 – The wind has calmed down and I stand on the helicopter deck (on level 6) again. Open water, a bit of ice and in the distance a pale scheme. The island Kvitøya. It looks like the spray has reached the deck because everything is coated in ice and the ice on the floor is slippery and feels like soap powder.

After the breakfast I try to catch Kvitøya on the Nikon sensor.

The last photos are crap from a technical view (taken at 600 mm ƒ/6.3 in twilight on a moving ship and a travel tripod). Anyhow they show the glacial coast of this Arctic island which I think is very impressive. A pity that the weather was so cloudy.

26. Feb morning – we reach ice again

While I take these photos another thing happens: we reach ice again. First fields of beautifully rounded pancake ice floes, then a few hours later we are in ¹⁰/₁₀ of thick ice again. There Kronprins Haakon can show again that it is an icebreaker.

We have another meeting at 09:00 +2h. We learn that it is more than unsure whether station P4 will have any reliable sea ice to work on. The cruise leader asks: shall we try P5 instead? Yes, all scientists agree. So today we will head to P5 at 80.5 °N 34 °E. That’s only an estimated position. First of all a suitable ice floe has to be found and then this floe will drift on the sea and so change position while ice work is ongoing.

26. Feb 16:00 – checking the ice

Eight hours later. Together with the cruise leader and the captain the ice experts had looked for a suitable ice floe. When they were satisfied the ship stopped and a derrick lowered the ice gangway. Now four people are on the ice. All equipped with survival suits. Two of them carry rifles. We are in the home of the polar bears.

Will I be allowed to enter the sea ice? Perhaps already tomorrow? I doubt it but I’m really longing. I don’t know where this strong relation for the Arctic comes from but it’s definitely there and it grew the last days. And I want to be part of it as much as possible.

Polar expedition AeN JC3 – day 6: sailing through the ice

This article is part of the series “2022-02: Winter cruise KPH”.

Day 6 · 24 February 2022

We are on our way to P4, our first ice station. P4 lies at 79.75 °N 34.00 °N, round 50 km southeast of the island Kvitøya (white island) that belongs to the Svalbard archipelago. This station is more north than Ny-Ålesund on Svalbard. The estimated time of arrival is tomorrow round lunch time.

However it is not granted that the ice will be safe enough to work on. In addition to that it will become stormy tonight and maybe the whole next day according to windy.com . So even when the ice is safe the weather conditions could be too harsh. So there are several uncertainties. We plan for the station but more we cannot do yet.

Today is a cold day with temperatures maximum of -25.0 °C and minimum of -30.5 °C. I’ve experienced colder temperatures many times in my live in different parts of Lapland, but then the wind was always calm. With the ongoing wind the resulting windchill lies between -36 °C and -49 °C. And windy is right: it starts getting windier in the evening.

temperate in °C | wind speed relative to the ship in m/s | resulting windchill in °C.

I take photos of marine animals, I learn the basics of ice observation but I stand outside quite often today. Watching the icebreaking polar research vessel Kronprins Haakon breaking through the ice. It is a great experience and I’m happy that I may participate.

But now, let the photos speak. The first I made at 3:50 in the night, the last ones at 19:10.



Polar expedition AeN JC3 – day 5: marine fauna · entering the ice · temperature drop

This article is part of the series “2022-02: Winter cruise KPH”.

Day 5 · 23 February 2022

12:30 – it gets colder

Over night it has become much colder and windier. Temperature has dropped to -17 °C and the relative wind speed has increased to 17 m/s (ca. 60 km/h). According to the wind chill formula that feels like -33 °C. The taut nets around the deck are covered with ice structures and ice fog hovers over the still open sea.

14:00 – marine fauna

A large trawl net is being pulled up. Scientist are waiting on deck, they look eager. What will the trawl reveal?

The net is up and the haul is emptied onto the deck.

At once the marine biologists gather round the catch and start browsing, identifying, sorting. I know some of the animals, but neither taxonomy nor latin name. It’s a childhood’s memory – me walking along the shore, my eyes glued to the soil to search for shells, jellyfish, worms, starfish. As a child I wanted to become a researcher but live has changed many times. Anyhow it finally brought me here on this polar expedition on Kronprins Haakon. But I digress, back to some photos of marine fauna and scientists:

I would love to know a bit more about the taxonomy of all these species but this will take some time and efforts, nothing you will get for free.

14:37 – the first sea ice

And there it is. The first sea ice is ahead.

The photo is awful. Noisy, underexposed two levels but I want it here in the blog. Not only for you but also for me because it’s the very first photo of sea ice on this cruise.

But there is more. While we continue north, soon the Barents Sea gets covered with pancake ice – called because of the rounded shapes of the ice floes – that soon make place for larger ice floes. That takes only 20 minutes.

(The images are not in chronological order for layout reasons)

For more than an hour I stand at the bow of the heli deck and watch the changes of the ice coverage. I love ice, I love the sea, I love cold winter and here I can get it all together. I feel happy! And cold it has become. Temperature -22 °C, relative wind speed 16 m/s resulting in a wind chill of -39 °C. The Canada Goose Snow Mantra parka starts to make sense. It shows what it can: keeping me warm under these conditions.

I use a pair of gloves and two pairs of mittens to keep hands and fingers warm. With one exception: Smartphone selfies. These I take bare-handed. While doing that the pinky of my right hand gets really cold and I will feel this for many hours. I’m lucky, the fingertip has no frostbite but I decide to stop making selfies in such harsh conditions. I love the arctic, but I play piano, too. I need my fingers. All of them.

15:59 – dinner pleasures

The haul caught a lot of animals, amongst others a lot of shrimps. Only some of them are needed for research. I help cleaning them, plucking away starfish and other species while a huge pot with salt water starts boiling. And at dinner we all get shrimps. Freshly caught in the Arctic. Delicious!

19:00 – photo shooting

A. a marine taxonomy expert asks me if he can borrow a tripod, he wants to take photos of some of the animals. Oops – I forgot the mount for attaching other cameras. I make another proposal: I’ll drop by and take pictures by myself. From this day I’m the “official court photographer” of non-microscopic animals. That’s work I really like. The first results are not the best, but I’ll share them anyhow:

Species identification taken from the cruise report of Andreas Altenburger. Thanks a lot!

21:30 – Sailing through the night

It’s dark. Ice has become thicker and you can hear the cracking and feel the vibrations from Kronprins Haakon breaking the ice. Again I stand on the heli deck looking ahead. Two strong spotlights illuminate the ice.

And for some minutes there is even a Northern light palely glowing in the sky.

While I stand there, happily watching the ice and the sky, muffled up warmly in my down parka and pants, temperature has dropped even more. -28 °C, windchill -44 °C.

temperate in °C | wind speed relative to the ship in m/s | resulting windchill in °C.


Polar expedition AeN JC3 – day 4: let the science begin!

This article is part of the series “2022-02: Winter cruise KPH”.

Day 4 · 22 February 2022 (part II)

18:14 on the bridge on deck 8. Some metres south of the 76th degree of latitude. People stand by the window, they are staring outside. Outside it’s dark. What are they looking for? What’s happening?

The activities for which we are doing this expedition have finally started. What activities do you realise on a scientific cruise? Collecting samples and data. For yourself and for others.

1 – Seaglider recovery

The very first activity is the recovery of a seaglider, an Autonomous Underwater Vehicle (AUV). It sends its position but still you have to locate it with your own eyes so that the icebreaker Kronprins Haakon can approach it. The recovery is much faster than excepted, already 15 minutes later the glider is on board. Anyhow it takes much more time to deactivate it, clean it thoroughly and most of all to dismantle it so that it fits into its huge plastic boxing that looks like an alien coffin.

To be honest, I don’t know for how long the glider drifted through the Barents Sea until we pulled it up. I don’t know neither what it measured and who will process this data. There is so much happening on this cruise that I do not manage to keep track of everything.

2 – CTD and water samples

There are a lot of abbreviations used on this cruise. One of them you hear frequently is “CTD”, which stands for conductivity, temperature, depth. A CTD is an electronic device that measures these three parameters constantly while it is winched down and up again. The conductivity is used to calculate the salinity, the relative amount of dissolved salt in the water. I will not go into details in this article because I’m not a scientist and I don’t want to write nonsense.

We have to talk about two more terms: “Moon pool” and “Niskin bottles”.

A moon pool is an opening in the floor of a ship deck to have access to water from inside the ship. Where this name comes from no one could explain.

When the moonpool is opened and the winch is ready the CTD is lowered into the water of the moon pool. And then it’s time for waiting – a quite common activity on the cruise. Time for discussions or just watching.

You see this “rosette” of dark, numbered cylinders? That’s Niskin bottles, used for sampling water. They can be opened and closed remotely so that it is possible to fetch water samples from different depths. These samples are used by chemists and marine biologists for different purposes. Since the chemists do the most delicate analysis they come first. The CTD rosette of Kronprins Haakon has 24 bottles. Today 22 of this bottles are filled, each one with water from a particular depth.

3 – plankton nets

It’s half past eight, when parts of the ship’s starboard hull is moved aside. Now it’s time for the first plankton nets. Marine biologists will work till long after midnight to bring down different nets for collecting zooplankton and phytoplankton. And there are many net types with different net sizes for different purposes. I have already worked with marine biological data so I know the names as bongonet or multinet. But now I see them first time in real life and learn about the different purposes and methods. Each net has not only its own construction but needs a distinct speed for being lowered and another one for being pulled up again.

Not all plankton nets are taken from the starboard. Some are so heavy, they need the more powerful winch at the stern of the ship. One of these is the multinet, a combination of five nets for collecting plankton from different depth intervals.

The activities continued the whole night. According to the data the last one was finished at 6:31, one hour before breakfast. I however decided to go to sleep at half past twelve. It was not relevant for my work to watch every activity and I was really tired. I’m a morning lark, not a night owl.

And since this blog article is already quite long I make it optically even longer by finishing it with another photo featuring the multinet.