assign1 - Introduction to Atmospheric Sciences(ATOC-210...

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Introduction to Atmospheric Sciences (ATOC-210) Assignment # 1 Due date February 5/09 1. What is the "ozone hole", and what are its potential causes? At what latitude or what regions is this phenomenon observed? Is it more localized around the poles, explain your reasoning? It is the reduction of ozone column (integrated ozone concentration x distance) in stratosphere. It can be caused by release of active halogens (e.g., Cl radicals) upon the photolysis of CFCs from anthropogenic activities that are transported to stratosphere. CFCS are generally long-lived in troposphere, and it takes time to be transported into stratosphere (decades to centuries). Although the decrease in stratospheric ozone layer is observed all through the globe, but it has been observed to be more localized over poles, particularly over Antarctica. It is contributed to several factors including the cold temperature (affecting chemical reactions), polar vortex and isolation of air mass. 2. A standard pressure of 1013 mb is also known as "one atmosphere" (1 ATM).
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This note was uploaded on 12/25/2011 for the course ATOC 210 taught by Professor Ariya during the Winter '09 term at McGill.

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assign1 - Introduction to Atmospheric Sciences(ATOC-210...

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