ESCI 1001 Lecture Notes - Lecture 8: Thermohaline Circulation, Valley, Ocean Current
Document Summary
Troposphere about 10 km; weather layer. Stratosphere up to 50 km; drier layer. Thermohaline circulation ocean circulation driven by temp & salinity. Ablatim transformation of ice into water vapor. Valley glaciers rivers of ice that form in cold mountain ranges & flow down valleys: calving - Continental glaciers ice sheet: thick, slow-moving, cover large parts of continents, antarctica & greenland; 75% of freshwater. Ice shelf thinner sheets of ice along the edge of continental glaciers. Sea ice floating ice in the open ocean. Striations grooves in rock surface from debris (rock) dragged along base of glacier (can tell glacier movement direction) Cirque inverted cone, steep walls, flat valley, head of valley. U-shaped valley steep walls, broad, rounded valleys. Hanging valley narrow ridge between two cirques; sharp, jagged crests where 2 cirques meet. Fjord flooded, glacial valley; usually along coastline. Tills unconsolidated sediment; poorly sorted (clay boulders) Moraine accumulations of rocky sand at the edges or ends of glaciers.
