This is an example of recent ice drift: observe the divergence of drift vectors at Beaufort (which causes coast water opening, stretching of ice and opening of leads). This does not contribute to ice volume increase given the overall expansion in that given closed area (rather decrease and export out of the Beaufort, even when the leads and openings refreeze). However note the converging of ice drift vectors at CAB side of ESS. That causes ice compression and subsequent pressure ridges. For that given closed area, volume increases just by drift ice compression.
The question that is not clear to me is that if CryoSat can resolve that ice accumulation that goes to pressure ridges, since, given the small area that pressure ridges occupy with respect to the rest of the ice cap, the radar signal of these ridges (reaching back the satellite slightly before the main signal) will be extremely weak.
However, it is known that pressure ridges can accumulate a vast amount of ice volume (reference missing)*.
I should look for a map of overall drift of the past months, but just this as an illustrative example.
* Wikipedia Entry gives this reference:
Leppäranta, M. (2005). The Drift of Sea Ice. Springer-Verlag, New York, 266 p.
that claims that half the volume of ice could be stored in ridges, but I have not read it, and is a bit old given the evolution of the Arctic