GL102 Lecture Notes - Lecture 11: Ice Shelf
Document Summary
Lecture 11 - continuation chapter 16 and starting chapter 17. Landscapes that have been shaped by the dissolution by groundwater. Glacier: thick mass of ice, originates on land from the accumulation, compaction and recrystallization of snow. May form where precipitation falls at high elevations or high latitudes. Ice can be stored for 1000"s-10,000"s of years (or more) Currently two major ice sheets: greenland and antarctica. Ice flows out in all directions from snow accumulation areas. Exist in mountain areas, usually following valleys originally occupied by streams. Ice caps - smaller than continental glaciers. Outlet glaciers - flowing down valleys from a larger ice mass. Ice streams - may extend from outlet glaciers. Piedmont glaciers - one or more alpine glaciers emerge from a mountain valley - broadsheet. Glaciers from where more snow falls than melts. When temp drops h20 at edge of snowflake vaporized and condensed at centre of snowflake.
