cycles describe the transfer and changes from one storage reservoir to another examples: rock cycle,...
Post on 21-Dec-2015
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Cycles
• Describe the transfer and changes from one storage reservoir to another
• Examples: rock cycle, water cycle, carbon cycle
Rock cycle
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Rock cycle
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Water cycle
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• Average amount of time spent in a reservoir
• Residence time =
amount in reservoir/amount added (removed) per unit time
Residence time
Amount out/time
Amount in/timeAmount in reservoir
Residence time at Berkeley
• 20,000 students
• 5,000 enter (leave)/year
• Residence time?
Residence time = 20,000 students/5,000 students/year
= 4 years
Residence time of water in the ocean
• Volume in ocean: 1.3x109 km3
• Discharge from rivers: 3.5x104 km3/yr
• Residence time: volume/discharge= 1.3x109 km3/ 3.5x104 km3/yr
= 30 ka
Carbon cycle
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Long term Carbon cycle
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Carbon cycle: volumes
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Last 400,000 years
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