EAS201 Lecture Notes - Lecture 16: Ocean Current, Basalt, Plate Tectonics
20 Sep 2016
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Largest atmospheric factor: greenhouse gases (h2o) > co2 > ch4 > cfcs > n2o [we ignore h2o] On differing time scales and interdependent secondary (8) ocean circulation patterns (rapidly distributing heat) Distribute heat, water is a medium that absorbs heat very well. Another ocean circulation pattern (9) wind and weather circulation patterns (rapidly distributing heat) Happening all the time, think about it like circulatory system. Sand that gets blown across the ocean (from sahara to carribean) 9b: weather patterns (10) plate tectonics (changing global albedo and ocean currents) Climate depends on plate tectonics (11) superplumes (episodic huge co2 input) At those times there were humungous amounts of co2 expelled into the atmosphere (12) meteorite impacts (episodic catastrophic dust shields) Vale of dust (umbrella) distributed around the world. For at least a few thousand yeasrs the earth would"ve been colder until the dust settled out and the sun came through again (13) human activities ( episodic catastrophic ? event)
