GEG 10, Week 1 Notes
GEG 10, Week 1 Notes GEG 10
Kutztown University of Pennsylvania
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This 3 page Class Notes was uploaded by Chandler Nedimyer on Friday February 5, 2016. The Class Notes belongs to GEG 10 at Kutztown University of Pennsylvania taught by Dr. Richard Courtney in Spring 2016. Since its upload, it has received 57 views. For similar materials see Elements of Physical Geography in Geography at Kutztown University of Pennsylvania.
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Date Created: 02/05/16
Week 1 Systems A system is an assemblage of parts that comprise a definable whole. Earth has FOUR systems: 1. Gaseous – Atmosphere 2. Water – Hydrosphere 3. Rock – Lithosphere 4. Life – Biosphere Mass and Energy flow throughout The elements of a system must be linked by flows of something. Mass stuff/material flows through system Energy flows through system Boundaries of the system may be real or arbitrary The boundary between Earth’s system and space is arbitrary System Types 1. Open – mass and energy freely enter and exit the system 2. Closed – mass and energy do not freely enter and exit the system Earth Atmosphere System is open to flows of energy, but not naturally to mass. System States Δs = Change to store Input (I) Storage (s) Δs = average change ΔS Output (O) 1. I = O , Δs = Ø Steady State Equilibrium 2. I > O , Δs = + Positive Balance 3. I < O , Δs = - Negative Balance 4. I ≅ O, Δs = Ø Dynamic Equilibrium Planet Earth’s System System Sensitivity: how easy it is to make a system change state sensitivity is mass dependent Earth is sensitive to Carbon Dioxide Feedback Mechanisms 1. Positive: a system reaction that reinforces the direction of system change (reinforces Δ) 2. Negative: a system reaction that fights against the direction of system change (Fights Δ) Steps: 1) System upset Ex. More solar energy 2) Identify 1 Reaction - Warms up system 2a) Global Warming nd 3) Identify 2 Reactions - rising sea levels, melting ice caps, thermal expansion - evaporates, clouds (Negative, fights change Δ)
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