ENVS 80b.2005.assignment.1

ENVS 80b.2005.assignment.1 - ENVS 80b Ecological Forecast...

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ENVS 80b: Ecological Forecast for Global Warming Fall 2005 Assignment #1 Boykoff PART I : answer the following questions within the 2-page limit see syllabus for more information 1. Which of the following are greenhouse gases (GHGs) (3 pts)? f. A and D 2. Briefly explain the distinction between climate change and global warming (this could be a good opportunity for a few citations) (6 pts): Climate change is a direct effect from global warming. Global warming is the increasing of greenhouse gases in the atmosphere which in turn causes rising temperatures, changing the climate at an unnaturally high rate. Climate change is expected over long periods of time, but due to global warming, it has drastically changed in a short amount of time. 3. A. According to the IPCC, up to how many degrees F may the temperature rise by 2100 (3 pts)? e. 10.4 o F B. Converting this CHANGE from o F to o C, how much of a temperature rise by 2100 is this (3 pts)? _5.8__ o C rise (note the different calculation procedures for temperature change and for actual temperature reading ) 4. Match the reservoir/physical system most closely associated with the descriptions (note that some reservoir/physical systems may be used more than once) (1 point each): a. atmosphere b. lithosphere c. hydrosphere d. biosphere _a___ associated with the greenhouse effect _c ___ comprises approximately 74% of the Earth’s surface _b___ consists of three layers: crust, mantle and core _d ___ the reservoir/physical system predominately inhabited by living organisms _a_ __ a mixture of gases, composed approximately 375-380 parts per million (ppm) of CO 2 _c___ associated with both the solubility and biological pumps 5. A. Provide the definition of feedbacks , as discussed in class (6 pts): Feedbacks are processes or mechanisms that amplify or diminish a change in the system. When dealing with global warming, positive feedbacks increase warming, while negative feedbacks decrease it.
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ENVS 80b: Ecological Forecast for Global Warming Fall 2005 Assignment #1 Boykoff B. Provide a brief and clear example of a positive feedback (3 pts): An example of a positive feedback includes the “reduction of growth… especially in forests because of the stress caused by climate change,” (Houghton 2004; p. 40). This feedback will only become larger as the increase in climate change continues to escalate. C. Provide a
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This note was uploaded on 04/15/2008 for the course ENVS 80B taught by Professor Boykoff during the Fall '05 term at UCSC.

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ENVS 80b.2005.assignment.1 - ENVS 80b Ecological Forecast...

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