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TeachMeFinance.com - explain Atmospheric Lifetime Atmospheric Lifetime The term 'Atmospheric Lifetime' as it applies to the area of the environment can be defined as 'The lifetime of a greenhouse gas refers to the approximate amount of time it would take for the anthropogenic increment to an atmospheric pollutant concentration to return to its natural level (assuming emissions cease) as a result of either being converted to another chemical compound or being taken out of the atmosphere via a sink. This time depends on the pollutant's sources and sinks as well as its reactivity. The lifetime of a pollutant is often considered in conjunction with the mixing of pollutants in the atmosphere; a long lifetime will allow the pollutant to mix throughout the atmosphere. Average lifetimes can vary from about a week (sulfate aerosols) to more than a century (chlorofluorocarbons (CFCs), carbon dioxide). '. Previous 5 Terms: atmosphere (The) Atmospheric Boundary Layer Atmospheric Circulation Model Atmospheric crude oil distillation Atmospheric Infrared Sounder Next 5 Terms: Atmospheric pressure Atmospheric Radiation Atmospheric Radiation Measurements Program (ARM) atmospheric response variables Atmospheric shock wave About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.