FEATURED DATA ARCHIVE
7 February 2008
SOFIE measurements are being used to examine
hemispheric differences in PMCs and their environment. The
figure shows SOFIE results for the northern summer of 2007,
and the southern sumer of 2007/08. Ice is more frequent and
appears about 10 days earlier in the north compared to the
south. The altitude of peak extinction (Zmax) for southern
PMCs is about 3 km higher, consistent with the southern mesopause
being about 3 km higher than in the north. Northern PMCs have
greater ice mass densities, and are characterized by slightly
more aspherical particles, than in the south. Water vapor
measurements at Zmax are similar in the north and south.
Credit: Solar Occultation For Ice Experiment
data processing team at GATS, Inc.