Report
no.10: The SEBs in 2014/15.
(by
G. Adamoli & J. Rogers)
On the SEBs edge,
hi-res images revealed a wealth of small-scale detail, and JUPOS
measurements revealed a wide range of speeds.
Most features had speeds close to the ZWP, although their appearance
varied between different sectors. They included rings (vortices) with full
jet speed, up to DL2 = +121 deg/month, i.e. typical jetstream spots.
However there were also wave-like features at the same latitude as
the jet peak with much slower retrograding speed, similar to what we
observed in 2011, but more extensive.
They appeared
to be waves whose phase speed was much less than the wind speed.
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