From the Bamber paper referenced by Mr. Hunt:
"we compare thinning rates derived from ICESat-1 for 2003–2009 with swath-processed CryoSat-2 data from 2010 to 2018."
"Changes in driving stress, due to a steeper slope at the glacier margin, could be responsible for the ice drawdown on the northern flank ... probably too small to explain the change "
"Subshelf melt rates increased from 2013 to values similar to those from 1998–2010"
"the maximum thinning rates during the CryoSat-2 epoch, exceeding 3 m yr–1 (Figs. 1g and 2a), are occurring not in the fast-flowing main trunk or tributaries, as previously reported, but beyond the shear margins, in areas of relatively slow flow (50–100 m yr–1) where motion is controlled by ice deformation not basal sliding. By contrast, the fast-flowing main trunk has mean thinning rates of about a factor three lower than the interstream region (Fig. 2a). The peak thinning rate in the interstream region is also associated with an acceleration in flow (Fig. 1c,f) and a modest increase in gravitational driving stress (Fig. 1f ). Thus, mass loss is now propagating into areas of slow, deformation-dominated flow "
"from 2013, ice shelf thinning recommences with a rate comparable to that in the first decade of the 2000s (Fig. 3). We detect a modest increase in the thinning rate close to the grounding line coincident with the resumption of oceanic melting (Figs. 2, 4c and 3), but in general, the highest thinning rates have shown a decline between 2012 and 2017"
"therefore, in the absence of anomalously high subshelf ocean melting, grounding line retreat and accelerated mass loss of PIG will be limited and at the lower end of model estimates leading to about 3 mm sea level equivalent above the present-day imbalance (of ~0.4 mm yr–1) over the next five decades[6]. We note, however, that subshelf melt rates are sensitive to decadal ocean variability[27,28] and have a complex relationship with climate variability[29,30], the geometry of the cavity[31] and tidal pumping close to the grounding line[32]"
sidd