EESA06H3 Lecture Notes - Lecture 11: Oxygen-18, Lithosphere, Nunatak
Document Summary
Albedo- suns reflection from the snow to space. Water absorbs lights which warms the whole area. Snowflakes pile and makes layers and layers and become ice as the heavy from above layers push them down. Starts from snow to firn/neve then glacier ice (greatest density) Firn/neve is snow which has survived a summer melt season. Glacier can form: mountain/alpine: cover small areas, generally confined to mountain valleys, continental: cover extensive areas, are not confined by topography, nunatak is a rock that pops up through ice sheets. Snow is gained at the accumulation area (more snow than melting) Ablation area is when meting exceeds precipitation. Liquid water flows beneath the glacier (dirty water because it picks up depris) Ice can flow under gravity, slide along their bed, deformation of ice, deformation of the bed. Till are sediments that were deposited by the glacier, mixture of grains sizes and materials, no order. Advancing glacial is more gaining snow then melting.
