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TeachMeFinance.com - explain Suess effect Suess effect The term 'Suess effect' as it applies to the area of carbon dioxide can be defined as ' The relative change in the 14C/C or 13C/C ratio of any carbon pool or reservoir caused by the addition of fossil-fuel CO2 to the atmosphere. Fossil fuels are devoid of 14C because of the radioactive decay of 14C to 14N during long underground storage and are depleted in 13C because of isotopic fractionation eons ago during photosynthesis by the plants that were the precursors of the fossil fuels. Carbon dioxide produced by the combustion of fossil fuels is thus virtually free of 14C and depleted in 13C. The term Suess effect originally referred to the dilution of the 14C/C ratio in atmospheric CO2 by the admixture of fossil-fuel produced CO2, but the definition has been extended to both the 14C and 13C ratios in any pool or reservoir of the carbon cycle resulting from human disturbances'. Previous 5 Terms: Sudden Impulse (SI+ or SI-) Sudden Ionospheric Disturbance (SID) sudiform sudoriferous suede Next 5 Terms: SUF Sugar price support program Sugar re-export programs suicidology suidian 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.