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TeachMeFinance.com - explain planetary boundary layer planetary boundary layer The term 'planetary boundary layer' as it applies to the area of carbon dioxide can be defined as ' The transition region between the turbulent surface layer and the normally nonturbulent free atmosphere. This region is about 1 km in thickness and is characterized by a well-developed mixing generated by frictional drag as the air masses move over the Earth's surface. This layer contains approximately 10% of the mass of the atmosphere. Also called the 'atmospheric boundary layer' or 'frictional layer''. The term 'planetary boundary layer' as it applies to the area of the weather can be defined as ' The layer within the atmosphere between 1 km and the earth's surface where friction affects wind speed and wind direction'. The term 'planetary boundary layer' as it applies to the area of Earth observation can be defined as ' the turbulent layer of atmosphere occupying the lowest few hundred meters of the atmosphere'. Previous 5 Terms: plane plane plane figure planet Planetary albedo Next 5 Terms: planetesimal planetesimals planetogeny planetology planform 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.