What are meant by the terms positive and negative feedback mechanisms?

1. Assume that you have 100 years of continuous temperature records from your local weather service office.  Discuss some of the difficulties you might have trying to determine whether average temperatures have increased during this period.2. What are meant by the terms positive and negative feedback mechanisms?  Give an example of a process that would be considered a positive feedback mechanism during a period of warming on the earth.  Can you think of a negative feedback mechanism?3. Discuss the significance of a predicted increase in global temperatures of 3 C, as opposed to a predicted increase of 1 C.4. The hottest places on earth are not found near the equator in tropical wet climates but rather in arid climate regions.  Why is this true? 5. What meteorological information is the primary basis for climate classification using the Köppen system?  Give Examples.  PLEASE USE ORIGINAL TEXT AS THIS WILL BE CHECKED THRU TURNITIN. 

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