POLAR6 - The final campaign days

As we had to cancel several flights due to bad weather, so we planned quite ambitiously for the remaining two days of the campaign. On July 20 we could sample ship plume while the Amundsen was almost stationary conducting oceanographic work in the Sound close to Resolute. Engine loads were low and, adding to this, the foggy conditions made it challenging for us to actually find the plume. By eye it turned out to be indistinguishable from the fog and while circling around we had a hard time to avoid catching our own exhaust instead!

The Amundsen from the POLAR6
The Amundsen from the POLAR6
Polar bears in view of the POLAR6
Polar bears in view of the POLAR6

On our last campaign day, July 21, we had scheduled two flights. The first flight was again entirely dedicated to ship plume sampling. Having learned from yesterday’s experience we did a lot better and could characterize the ship plume at several distances from the Amundsen. This time even without crossing our own exhaust. Also, we had asked for high engine loads and the captain kindly followed our request to break through ice the night before and during our plume sampling. After sampling was completed the Amundsen crew invited us to do some photo shooting. See the picture above and watch carefully to find the POLAR6 just right beside the Amundsen!

For the very last flight we decided to go as far east in Lancaster Sound as weather conditions would permit. On an earlier and sunny flight we had evidenced an event of possibly nucleated and grown particles and now we were curious to see whether this event was reproduced under changed meteorological conditions. We couldn’t observe such an event low down again but instead we came along an accumulation of tiny particles aloft when we did two profiles up to 9500ft. 

 

We were very happy about these successful final campaign flights and got even more excited as we could spot a group of polar bears during one of our low altitude flights! What a nice add-on to an already exciting campaign!

 
-Julia Burkart, NETCARE Post-doc
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