Joughin and others, 2008 observed that seasonal drainage of meltwater to the glacier bed induces a uniform acceleration of 50 — 150 meters / year over a ~ 300 km long section of the West Greenland margin that is not drained by outlet glaciers, causing a large fractional acceleration of the interior ice sheet but a small
fractional change in the speed of fast - moving outlet glaciers.
He goes on to conclude that the small
fractional change in station wind -
speed values relative to reanalysis values are unlikely to have caused a global bias
in trends of Tmin
in calm conditions approaching -0.1-C over the 50 - year period, equivalent to -0.02-C / decade, 1 / 10 - th of the observed warming signal.