Snow accumulation and surface topography in the katabatic zone of Eastern Wilkes Land, Antarctica

Ian D. Goodwin
1990 Antarctic Science  
Snow accumulation and surface microrelief distributions, together with the surface katabatic wind pattern and elevation profiles, are presented for the eastern Wilkes Land katabatic wind zone. The broadscale net accumulation distribution displays a strong negative correlation with elevation but on the mesoscale there are significant variations with respect to the elevation profile. The accumulation distribution was found to be dependent on slope aspect. Higher accumulation rates were observed
more » ... the north-east (windward) slope than those on the north-west (leeward) slope for the elevation range of 1870 m-2230 m. These higher accumulation rates are associated with the occurrence of longitudinal dunes deposited by precipitation, during synoptic events. The dependence of the accumulation distribution on aspect implies that synoptic and orographic processes are the major control on the depositional regime, and that maritime synoptic systems regularly penetrate eastern Wilkes Land to at least 2300 m elevation.
doi:10.1017/s0954102090000323 fatcat:oy7bzjeypras3j3vm42gxf6mw4