This is Johan Nilsson's log
Water Column Imaging/Physical Oceanography

Johan Nilsson is a Professor at the Department of Meteorology at Stockholm University (SU) and he will lead the work package of Water Column Imaging/Physical Oceanography during the Ryder expedition.
(All photos are taken by Johan.)
August 6

Yesterday in the afternoon, we embarked on Oden that was anchored off Thule airbase on northwest Greenland. The sun was warming and it was completely calm, as warm and nice as summers can get in the high arctic. After dinner time, Oden began to steam towards the Ryder Glacier on the very northern part of Greenland. As Oden exited the Thule fjord system, we could enjoy the sight of many large ice bergs in the midnight sun.

This morning comes with a layer of high thins clouds, which keeps the temperature to just a few degrees above freezing. Oden is moving into Nares Strait with Greenland to the east and Ellesmere Island to the west. The landscape is spectacular by harsh. Mountains of old eroded sedimentary rocks, glaciers, and sea ice make up the scenery. On the Greenland side, there are ice streams flowing towards the sea from the huge continental ice sheet, which can be seen in the distance. Sea birds are the only wildlife so far. Calm weather and so far favourable sea ice conditions makes the journey polewards swift and enjoyable. Within days, we will enter the Ryder Fjord area where no ships have been before.



August 9

We have settled into life and routines onboard Oden and many of us have also started to collect interesting data. Yesterday it was Ärtsoppa, pannkakor and punsch on the menu (pea soup, pancakes, and a sweet snaps). My American and Scottish company at the table asked me why this meal is always served on Thursdays. Since we have no internet connection I could not cheat and do a google search, but had to confess that this is also a mystery to me. Knowledge you don't have in your memory or in bought books is not accessible here.
The temperatures have dropped to a few degrees above freezing but thanks to fair winds it is pleasant to work and spend time on deck. We are all very excited to reach Ryder fjord and unexplored waters. In clear conditions, we can see the fjord entrance but fairly compact sea ice with ridges and thick floes will make to final approach slow. Hopefully, we are there within a few days.




August 14

Oden is now in the Sherard Osborn Fjord which is truly spectacular and filled with ice bergs some of which are nearly 10 kilometers long and over 200 m thick. Tidal currents move these islands of ice erratically around in the fjord and they could potentially trap Oden inside the fjord. It has been an unusually warm summer on Greenland, which has resulted in exceptionally warm surface water temperatures in the ice filled fjord. We have measured water temperaturs up to 4 C in the upper 10 meters of the fjord. Warm ocean and air temperatures drive strong melting of the ice, causing smaller ice bergs to disintegrate and roll over, sending waves across the fjord.



Senast uppdaterad: 19 maj 2022
Sidansvarig: Department of Geological Sciences