The bottom air layer temp did change and became equal to the ground temp, and the temp profile changed, but the top layer temp also remained constant. (scienceofdoom.com)
Using the Saharan Air Layer as a proxy for volcanic ash, the test aircraft will now fly over the Atlantic Ocean west of Morocco to prove the equipment can detect the fine particles of sand at altitudes of up to 20,000 feet and a distance of around 100 km. (sciencenordic.com)
As a matter of fact skinnies have no insulating air layer between the body and the fabric which would be very helpful to stay warm at temperatures in the double negative digits. (highlatitudestyle.com)