The third science flight took off this morning, heading first to do some low level cloud sampling and then to the north over large polynas located between Bathurst Island and the Grinnell Peninsula. As well, they will do vertical profiles to and from 9500 feet. Heading north, they will fly low (200 feet off the surface), looking to see if aerosol properties change over melting ice, open water, and solid ice. The figure below shows a map of the region (Resolute is at the red asterisk). The other image shows the real-time state of the ice (obtained from http://www.iup.uni-bremen.de:8084/amsr2/), with purple colours indicating solid ice.
On the two previous science flights, large numbers of very small particles were observed at low altitudes, transitioning to fewer, larger particles away from the surface. A question is whether the levels of small particles are related to the nature of the terrain below.
-Jon Abbatt, NETCARE Priciple Investigator