More ice stations and back to the open water
This article is part of the series “2026-10: Fram Strait cruise KPH”.
22 October
After a day with drizzle and bad visibility, there is another ice station, starting around 78° 50′ N, 6° 15′ W. The first part is interrupted soon, because a polar bear shows up, forcing the sea ice team to go back on board and wait until this specimen of Ursus Maritimus has walked away far enough for the team to go back onto the ice.
After lunch I can go onto the ice for another drone flight. It is this flight that will teach me something about drone flying on the ice. It is cold, but everything goes fine. After flying I take a selfie and go back on board the icebreaker Kronprins Haakon. I enjoy the sun and take some photos from the helicopter deck.
When I get the first result of the orthomosaic – stitched together from more than 200 photos – I experience a surprise. The photo is – well – chaos. Perhaps because I added a wrong image? But the second and third attempts are not better.
Was it the GPS? Other sensors? What happened? To make it short: It was the drift of the sea ice. It was 0.4 knots this day, which does not sound extreme. Nevertheless, it is a drift of about 12 metres per minute and that adds up, when drone flying takes half an hour. Over the next two days I use some of my time to write a script to compensate for the drift by reading the position of the ship (which drifts together with the ice). And with this drift compensation, the orthomosaic creation finally works well:
23 October
Another day with an ice station. The ice team has it tough today with temperatures around -17 °C and a wind speed of more than 10 m/s. At the same time, it gets darker each day. Yesterday there were around three hours of daylight; today it is less than two and a half. Tomorrow it will be eighty minutes and then there will be polar night for almost four months.
In the afternoon I take another drone flight from the ice. Brrr! That’s cold. The second photo shows my caps and balaclavas drying – I wore them all, one above the other.
24 October
For all those interested, we got a tour through the machinery spaces by maskinsjef B. I have a deep respect for the crew members working with these complex systems and who know so much about every technical facet of this icebreaker. I do not even try to tell you anything about it because I do not have the slightest clue about any of these components. Thanks for the great tour, B.!
At 3 o’clock in the afternoon, something strange happens – we are leaving the ice behind. The boundary between the marginal ice zone and the open water is like being cut with a knife. When I am on deck, it is already too late to see this cut. We have been in the sea ice for more than a week and I have grown accustomed (and fond) to it.
But it’s not for long; we return into the ice only hours later.
25 October
Some shots taken in the evening.
26 October (today)
Today we have the last ice station. It is pretty dark, the visibility is far from brilliant and it is drizzling. I get a message from A., who has discovered a rare guest in this region – a snowy owl sitting on an ice floe nearby. This is the best shot I get of it from deck 3.
To my delight it clears up after a while and the drizzle has stopped. My last chance to go out on the ice again to take a series of drone photos for the sixth orthomosaic of this cruise. Despite the damp weather, the results turn out to be surprisingly good. (And yes – I used drift compensation again, because here we had a drift of 0.6 knots, which is 30 cm a second.)
In the afternoon, while I am playing table tennis with two researchers, we leave the ice again, this time for good. The rest of this week we will spend in open water (it’s fun to play table tennis in a ship that is slightly rolling) and continue with one of the main fields of this cruise that I haven’t mentioned yet: conducting CTD casts to measure Conductivity (and so salinity) and Temperature at different Depths. The oceanographers have already conducted 49 CTDs over the last two weeks and there will be many more. But that’s another story to tell.
