GEOG 203 Lecture Notes - Lecture 2: Evapotranspiration, Positive Feedback, Climatology

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September 6th earth surface climatology and drainage basin hydrology. Attributes: function, a system can be open (river system, earth is an closed system, can have an input and water can enter the system, clear system boundary (something goes in and out) Increase system boundary water becomes close no more input or output of water: an environmental system budget. Initial forcing leads to an initial response: response is amplified by an environmental system, example. Initial forcing: increased concentration of co2 will lead to a warming climate which will lead to increased evapotraspiration and atmospheric moisture: example. Increased erosion soil flow removed more overland flow, less vegetation accelerated erosion {effect just gets stronger: example, changes in vegetation (tundra replaced by boreal forest) Warmer temperatures in winter more trees less albedo so more forests: negative feedback response is reduced. Initial forcing leads to an initial response: response is reduced by an environmental system, example.

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