2:30 PM - 2:45 PM
[ACC28-14] Spatial and temporal variability of surface snow chemistry and snow deposited condition at East Antarctic ice sheet
Keywords:Antarctic ice sheet, depositional condition, surface snow, snow chemistry
Surface snow samplings were conducted every 10km along the traverse route. Generally, the snow surface features are classified into three regions.
(1) coastal region: smooth surface, high snow accumulation
(2) katabatic slope region: rough sastrugi surface and smooth glazed surface
(3) high plateau region: smooth surface, little snow accumulation
We will show the spatial and temporal variability of surface snow accumulation and snow chemistry at East Antarctic ice sheet.
The chemistry of surface snow changes from the coast to inland. Furthermore, the chemical properties of snow are different for each surface at the same area. We can classify the surface snow with fresh drifting snow, deposited drift snow, soft and hard surface snow, sastrugi, surface hoar and so on. The value of each isotope ration and ion concentration greatly varied. Sometimes, snow might deposit thick equally. But the deposited snow was redistributed by the wind. When the snowstorm occurred, the blowing snow started to deposit in a certain opportunity. As for it, the area was not the uniform. It is necessary to discuss inhomogeneity of the depositional condition quantitatively.