After an excellent weather period where we saw evidence for particle nucleation and growth, and where we performed studies of some low level clouds, the fog moved into Resolute on July 13 for
four days. All flights were cancelled and we prepared ourselves for the arrival of the Amundsen. The goals of the Amundsen overlap flights are to extend the measurements being made on
the ship into the vertical, and to characterize the nature of the Amundsen pollution plume.
The fog lifted, allowing a flight on July 17th, but the conditions were not conducive to a flight with re-fueling close to the Amundsen at Pond Inlet – at the mouth of Lancaster Sound.
Instead, the flight stayed closer to Resolute over the Sound. It was very interesting to see how the atmosphere had changed from its character during the earlier, sunny period.
As well, clouds were sampled.
Yesterday, July 19th, the first overlap with the ship occurred while it was in the Sound, heading to the west and with winds behind it. The ship plume was sampled at a number of locations ahead of the ship (carried by the wind), providing a first glimpse of its impact on the background atmosphere.
For the final 3 days of the campaign (July 20 to July 22) , the ship will be close to Resolute in the ice. This will allow for both more ship overflights as well for more studies of the background atmosphere out over the open water over the Sound. The ship’s Captain is willing to change the number of engines and to work under different load, allowing for more detailed ship emissions characterization.
-Jon Abbatt, NETCARE Principle Investigator